TY  - JOUR
AU  - Smiljanić, Danijela
AU  - Daković, Aleksandra
AU  - Obradović, Milena
AU  - Ožegović, Milica
AU  - Marković, Marija
AU  - Rottinghaus, George E.
AU  - de Gennaro, Bruno
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/648
AB  - Modified phillipsite samples were prepared with two different amounts (monolayer and bilayer coverage) of surfactants octadecyldimethylbenzylammonium chloride (O) and dodecylamine (D). Composites were characterized by Fourier transform infrared spectroscopy with attenuated total reflectance (FTIR-ATR), thermal analysis and determination of zeta potential, and subsequently tested for removal of diclofenac sodium (DCF). Drug adsorption experiments were performed under different initial DCF concentrations and different contact times. In order to investigate the influence of the chemical structure of surfactants used for modification of phillipsite on the preparation and properties of composites and DCF adsorption, experimental data were compared with previously published results on DCF adsorption by composites containing phillipsite and the same amounts of surfactants cetylpyridinium chloride (C) and Arquad((R))2HT-75 (A). DCF adsorption isotherms for O and D composites showed a better fit with the Langmuir model with maximum adsorption capacities between 12.3 and 38.4 mg/g and are similar to those for C and A composites, while kinetics run followed a pseudo-second-order model. Composites containing either benzyl or pyridine functional groups showed higher adsorption of DCF, implying that surfactant structure has a significant impact on drug adsorption. Drug adsorption onto O, D, C and A composites was also confirmed by FTIR-ATR spectroscopy and zeta potential measurements.
PB  - Basel : MDPI
T2  - Catalysts
T1  - Influence of the Type and the Amount of Surfactant in Phillipsite on Adsorption of Diclofenac Sodium
IS  - 1
VL  - 13
DO  - 10.3390/catal13010071
UR  - conv_963
ER  - 

@article{
author = "Smiljanić, Danijela and Daković, Aleksandra and Obradović, Milena and Ožegović, Milica and Marković, Marija and Rottinghaus, George E. and de Gennaro, Bruno",
year = "2023",
abstract = "Modified phillipsite samples were prepared with two different amounts (monolayer and bilayer coverage) of surfactants octadecyldimethylbenzylammonium chloride (O) and dodecylamine (D). Composites were characterized by Fourier transform infrared spectroscopy with attenuated total reflectance (FTIR-ATR), thermal analysis and determination of zeta potential, and subsequently tested for removal of diclofenac sodium (DCF). Drug adsorption experiments were performed under different initial DCF concentrations and different contact times. In order to investigate the influence of the chemical structure of surfactants used for modification of phillipsite on the preparation and properties of composites and DCF adsorption, experimental data were compared with previously published results on DCF adsorption by composites containing phillipsite and the same amounts of surfactants cetylpyridinium chloride (C) and Arquad((R))2HT-75 (A). DCF adsorption isotherms for O and D composites showed a better fit with the Langmuir model with maximum adsorption capacities between 12.3 and 38.4 mg/g and are similar to those for C and A composites, while kinetics run followed a pseudo-second-order model. Composites containing either benzyl or pyridine functional groups showed higher adsorption of DCF, implying that surfactant structure has a significant impact on drug adsorption. Drug adsorption onto O, D, C and A composites was also confirmed by FTIR-ATR spectroscopy and zeta potential measurements.",
publisher = "Basel : MDPI",
journal = "Catalysts",
title = "Influence of the Type and the Amount of Surfactant in Phillipsite on Adsorption of Diclofenac Sodium",
number = "1",
volume = "13",
doi = "10.3390/catal13010071",
url = "conv_963"
}

Smiljanić, D., Daković, A., Obradović, M., Ožegović, M., Marković, M., Rottinghaus, G. E.,& de Gennaro, B.. (2023). Influence of the Type and the Amount of Surfactant in Phillipsite on Adsorption of Diclofenac Sodium. in Catalysts
Basel : MDPI., 13(1).
https://doi.org/10.3390/catal13010071
conv_963

Smiljanić D, Daković A, Obradović M, Ožegović M, Marković M, Rottinghaus GE, de Gennaro B. Influence of the Type and the Amount of Surfactant in Phillipsite on Adsorption of Diclofenac Sodium. in Catalysts. 2023;13(1).
doi:10.3390/catal13010071
conv_963 .

Smiljanić, Danijela, Daković, Aleksandra, Obradović, Milena, Ožegović, Milica, Marković, Marija, Rottinghaus, George E., de Gennaro, Bruno, "Influence of the Type and the Amount of Surfactant in Phillipsite on Adsorption of Diclofenac Sodium" in Catalysts, 13, no. 1 (2023),
https://doi.org/10.3390/catal13010071 .,
conv_963 .

TY  - JOUR
AU  - Obradović, Milena
AU  - Daković, Aleksandra
AU  - Smiljanić, Danijela
AU  - Ožegović, Milica
AU  - Marković, Marija
AU  - Rottinghaus, George E.
AU  - Krstić, Jugoslav
PY  - 2022
UR  - https://ritnms.itnms.ac.rs/handle/123456789/643
AB  - Cationic surfactant - octadecyldimethylbenzyl ammonium chloride (ODMBA) was used for modification of the three natural raw materials - bentonite, kaolin and zeolite. Adsorption of ODMBA by minerals occurred via ion exchange of inorganic cations on minerals with surfactant. Organomodified minerals - organobentonite (OB), organokaolin (OK) and organozeolite (OZ) were studied as adsorbents for removal of two non-steroidal anti-inflammatory drugs - ibuprofen (IBU) and diclofenac sodium (DS) at pH 7. For all systems, the pseudo-second order model showed the best correlation to kinetic experimental data. In all cases, the positive values of Delta H degrees indicated that the adsorption of both IBU and DS by organomodified minerals was endothermic in nature. Equilibrium data were better described by the Freundlich isotherm model, pointing to adsorbent heterogeneous active sites for adsorption. Under applied experimental conditions, the highest adsorption of both drugs was achieved by OB, while much lower capacities were observed for OK and OZ. Nonlinear isotherms and physicochemical characterization of organomodified minerals after drugs adsorption suggested complex mechanism consisting of hydrophobic interactions between hydrophobic part of the drugs and surfactants alkyl chains, electrostatic interactions of anionic forms of IBU and DS with the cationic "head" of ODMBA, as well as anion exchange of counterion ions from ODMBA micelle and anionic forms of both drugs. Adsorption of both IBU and DS was strongly dependent on the amount of ODMBA ions in the minerals.
PB  - Elsevier, Amsterdam
T2  - Microporous and Mesoporous Materials
T1  - Ibuprofen and diclofenac sodium adsorption onto functionalized minerals: Equilibrium, kinetic and thermodynamic studies
VL  - 335
DO  - 10.1016/j.micromeso.2022.111795
UR  - conv_945
ER  - 

@article{
author = "Obradović, Milena and Daković, Aleksandra and Smiljanić, Danijela and Ožegović, Milica and Marković, Marija and Rottinghaus, George E. and Krstić, Jugoslav",
year = "2022",
abstract = "Cationic surfactant - octadecyldimethylbenzyl ammonium chloride (ODMBA) was used for modification of the three natural raw materials - bentonite, kaolin and zeolite. Adsorption of ODMBA by minerals occurred via ion exchange of inorganic cations on minerals with surfactant. Organomodified minerals - organobentonite (OB), organokaolin (OK) and organozeolite (OZ) were studied as adsorbents for removal of two non-steroidal anti-inflammatory drugs - ibuprofen (IBU) and diclofenac sodium (DS) at pH 7. For all systems, the pseudo-second order model showed the best correlation to kinetic experimental data. In all cases, the positive values of Delta H degrees indicated that the adsorption of both IBU and DS by organomodified minerals was endothermic in nature. Equilibrium data were better described by the Freundlich isotherm model, pointing to adsorbent heterogeneous active sites for adsorption. Under applied experimental conditions, the highest adsorption of both drugs was achieved by OB, while much lower capacities were observed for OK and OZ. Nonlinear isotherms and physicochemical characterization of organomodified minerals after drugs adsorption suggested complex mechanism consisting of hydrophobic interactions between hydrophobic part of the drugs and surfactants alkyl chains, electrostatic interactions of anionic forms of IBU and DS with the cationic "head" of ODMBA, as well as anion exchange of counterion ions from ODMBA micelle and anionic forms of both drugs. Adsorption of both IBU and DS was strongly dependent on the amount of ODMBA ions in the minerals.",
publisher = "Elsevier, Amsterdam",
journal = "Microporous and Mesoporous Materials",
title = "Ibuprofen and diclofenac sodium adsorption onto functionalized minerals: Equilibrium, kinetic and thermodynamic studies",
volume = "335",
doi = "10.1016/j.micromeso.2022.111795",
url = "conv_945"
}

Obradović, M., Daković, A., Smiljanić, D., Ožegović, M., Marković, M., Rottinghaus, G. E.,& Krstić, J.. (2022). Ibuprofen and diclofenac sodium adsorption onto functionalized minerals: Equilibrium, kinetic and thermodynamic studies. in Microporous and Mesoporous Materials
Elsevier, Amsterdam., 335.
https://doi.org/10.1016/j.micromeso.2022.111795
conv_945

Obradović M, Daković A, Smiljanić D, Ožegović M, Marković M, Rottinghaus GE, Krstić J. Ibuprofen and diclofenac sodium adsorption onto functionalized minerals: Equilibrium, kinetic and thermodynamic studies. in Microporous and Mesoporous Materials. 2022;335.
doi:10.1016/j.micromeso.2022.111795
conv_945 .

Obradović, Milena, Daković, Aleksandra, Smiljanić, Danijela, Ožegović, Milica, Marković, Marija, Rottinghaus, George E., Krstić, Jugoslav, "Ibuprofen and diclofenac sodium adsorption onto functionalized minerals: Equilibrium, kinetic and thermodynamic studies" in Microporous and Mesoporous Materials, 335 (2022),
https://doi.org/10.1016/j.micromeso.2022.111795 .,
conv_945 .

TY  - CONF
AU  - Obradović, Milena
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Spasojević, Milica
AU  - Marković, Marija
AU  - Smiljanić, Danijela
AU  - Krajišnik, Danina
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/729
AB  - In this paper, results of ibuprofen (IBU) adsorption by organokaolins obtained by modification of the natural kaolin (KR) with surfactant - hexadecyltrimethyl ammonium bromide (H) are presented. Two different amounts of surfactant were used for modification of KR (50 and 90% of kaolin’s cation exchange capacity). Samples are denoted as HKR-50 and HKR-90. Adsorption of IBU on organokaolins was investigated with different initial drug concentrations (2 – 20 mg/L) in phosphate buffer at pH 7. Compared with KR which has no affinity to adsorb IBU, modification of KR with H improved adsorption of this drug. Results showed that adsorption of IBU increased with increasing of the amount of surfactant in organokaolins as well as with increasing of the initial concentration of the drug in solution. Adsorption of IBU by both adsorbents followed nonlinear isotherms and from the Langmuir model, the maximum adsorption capacities were 2.05 mg/g for HKR-50 and 3.12 mg/g for HKR-90.
PB  - Belgrade : Society of Physical Chemists of Serbia
C3  - 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry
T1  - Adsorption of ibuprofen by surfactant modified kaolin
EP  - 528
SP  - 525
ER  - 

@conference{
author = "Obradović, Milena and Daković, Aleksandra and Rottinghaus, George E. and Spasojević, Milica and Marković, Marija and Smiljanić, Danijela and Krajišnik, Danina",
year = "2021",
abstract = "In this paper, results of ibuprofen (IBU) adsorption by organokaolins obtained by modification of the natural kaolin (KR) with surfactant - hexadecyltrimethyl ammonium bromide (H) are presented. Two different amounts of surfactant were used for modification of KR (50 and 90% of kaolin’s cation exchange capacity). Samples are denoted as HKR-50 and HKR-90. Adsorption of IBU on organokaolins was investigated with different initial drug concentrations (2 – 20 mg/L) in phosphate buffer at pH 7. Compared with KR which has no affinity to adsorb IBU, modification of KR with H improved adsorption of this drug. Results showed that adsorption of IBU increased with increasing of the amount of surfactant in organokaolins as well as with increasing of the initial concentration of the drug in solution. Adsorption of IBU by both adsorbents followed nonlinear isotherms and from the Langmuir model, the maximum adsorption capacities were 2.05 mg/g for HKR-50 and 3.12 mg/g for HKR-90.",
publisher = "Belgrade : Society of Physical Chemists of Serbia",
journal = "15th International Conference on Fundamental and Applied Aspects of Physical Chemistry",
title = "Adsorption of ibuprofen by surfactant modified kaolin",
pages = "528-525"
}

Obradović, M., Daković, A., Rottinghaus, G. E., Spasojević, M., Marković, M., Smiljanić, D.,& Krajišnik, D.. (2021). Adsorption of ibuprofen by surfactant modified kaolin. in 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry
Belgrade : Society of Physical Chemists of Serbia., 525-528.

Obradović M, Daković A, Rottinghaus GE, Spasojević M, Marković M, Smiljanić D, Krajišnik D. Adsorption of ibuprofen by surfactant modified kaolin. in 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry. 2021;:525-528..

Obradović, Milena, Daković, Aleksandra, Rottinghaus, George E., Spasojević, Milica, Marković, Marija, Smiljanić, Danijela, Krajišnik, Danina, "Adsorption of ibuprofen by surfactant modified kaolin" in 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry (2021):525-528.

TY  - CONF
AU  - Marković, Marija
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Spasojević, Milica
AU  - Obradović, Milena
AU  - Smiljanić, Danijela
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/727
AB  - Cetylpyridinium chloride (CP) was used to modify the surface of the natural zeolite and adsorption
of two mycotoxins, ochratoxin A (OCHRA) and zearalenone (ZEN) was investigated. The
organozeolites were prepared with three different levels of CP (20, 50 and 100% of zeolite’s external
cation exchange capacity) and mycotoxin adsorption experiments were done at pH 3 and 7. Results
showed that with increasing amounts of CP at the zeolitic surface, adsorption of OCHRA and ZEN
increased, as well as with increasing amounts of solid phase in suspension. Adsorption of OCHRA
was dependent of the form of OCHRA in solution while ZEN adsorption was pH independent.
Maximum adsorption was obtained with the highest level of CP present at the zeolitic surface for
both mycotoxins.
PB  - Belgrade : Society of Physical Chemists of Serbia
C3  - 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry
T1  - Ochratoxin A and zearalenone adsorption by surfactant modified zeolite
EP  - 383
SP  - 380
ER  - 

@conference{
author = "Marković, Marija and Daković, Aleksandra and Rottinghaus, George E. and Spasojević, Milica and Obradović, Milena and Smiljanić, Danijela",
year = "2021",
abstract = "Cetylpyridinium chloride (CP) was used to modify the surface of the natural zeolite and adsorption
of two mycotoxins, ochratoxin A (OCHRA) and zearalenone (ZEN) was investigated. The
organozeolites were prepared with three different levels of CP (20, 50 and 100% of zeolite’s external
cation exchange capacity) and mycotoxin adsorption experiments were done at pH 3 and 7. Results
showed that with increasing amounts of CP at the zeolitic surface, adsorption of OCHRA and ZEN
increased, as well as with increasing amounts of solid phase in suspension. Adsorption of OCHRA
was dependent of the form of OCHRA in solution while ZEN adsorption was pH independent.
Maximum adsorption was obtained with the highest level of CP present at the zeolitic surface for
both mycotoxins.",
publisher = "Belgrade : Society of Physical Chemists of Serbia",
journal = "15th International Conference on Fundamental and Applied Aspects of Physical Chemistry",
title = "Ochratoxin A and zearalenone adsorption by surfactant modified zeolite",
pages = "383-380"
}

Marković, M., Daković, A., Rottinghaus, G. E., Spasojević, M., Obradović, M.,& Smiljanić, D.. (2021). Ochratoxin A and zearalenone adsorption by surfactant modified zeolite. in 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry
Belgrade : Society of Physical Chemists of Serbia., 380-383.

Marković M, Daković A, Rottinghaus GE, Spasojević M, Obradović M, Smiljanić D. Ochratoxin A and zearalenone adsorption by surfactant modified zeolite. in 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry. 2021;:380-383..

Marković, Marija, Daković, Aleksandra, Rottinghaus, George E., Spasojević, Milica, Obradović, Milena, Smiljanić, Danijela, "Ochratoxin A and zearalenone adsorption by surfactant modified zeolite" in 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry (2021):380-383.

TY  - JOUR
AU  - Smiljanić, Danijela
AU  - de Gennaro, Bruno
AU  - Daković, Aleksandra
AU  - Galzerano, Barbara
AU  - Germinario, Chiara
AU  - Izzo, Francesco
AU  - Rottinghaus, George E.
AU  - Langella, Alessio
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/596
AB  - Composites of two natural zeolites ? clinoptilolite and phillipsite, and cationic surfactants (cetylpyridinium chloride and Arquad? 2HT-75) were tested for the removal of two emerging contaminants ? ibuprofen and naproxen. For each zeolite-rich rock, two different modifications of the zeolitic surfaces were prepared (monolayer and bilayer surfactant coverage). The influence of the initial drug concentrations and contact time on adsorption of these drugs was followed in buffer solution. The Langmuir model showed the highest adsorption capacity for the composite characterized by a bilayered surfactant at the clinoptilolite surface: 19.7 mg/g and 16.1 mg/g for ibuprofen and naproxen, respectively. Also, to simulate real systems, drug adsorption isotherms were conducted in natural water (Grindstone creek water ? Columbia, Missouri, USA) by using the best performing adsorbent; in this case, a slight decrease of drug adsorption was recorded. Kinetic runs were performed in distilled water as well as in the presence of ions such as sulfates and bicarbonates; also, in this case, the interfering agents defined an adsorption decrease for bilayer composites.
PB  - Academic Press Ltd- Elsevier Science Ltd, London
T2  - Journal of Environmental Management
T1  - Removal of non-steroidal anti-inflammatory drugs from water by zeolite-rich composites: The interference of inorganic anions on the ibuprofen and naproxen adsorption
VL  - 286
DO  - 10.1016/j.jenvman.2021.112168
UR  - conv_905
ER  - 

@article{
author = "Smiljanić, Danijela and de Gennaro, Bruno and Daković, Aleksandra and Galzerano, Barbara and Germinario, Chiara and Izzo, Francesco and Rottinghaus, George E. and Langella, Alessio",
year = "2021",
abstract = "Composites of two natural zeolites ? clinoptilolite and phillipsite, and cationic surfactants (cetylpyridinium chloride and Arquad? 2HT-75) were tested for the removal of two emerging contaminants ? ibuprofen and naproxen. For each zeolite-rich rock, two different modifications of the zeolitic surfaces were prepared (monolayer and bilayer surfactant coverage). The influence of the initial drug concentrations and contact time on adsorption of these drugs was followed in buffer solution. The Langmuir model showed the highest adsorption capacity for the composite characterized by a bilayered surfactant at the clinoptilolite surface: 19.7 mg/g and 16.1 mg/g for ibuprofen and naproxen, respectively. Also, to simulate real systems, drug adsorption isotherms were conducted in natural water (Grindstone creek water ? Columbia, Missouri, USA) by using the best performing adsorbent; in this case, a slight decrease of drug adsorption was recorded. Kinetic runs were performed in distilled water as well as in the presence of ions such as sulfates and bicarbonates; also, in this case, the interfering agents defined an adsorption decrease for bilayer composites.",
publisher = "Academic Press Ltd- Elsevier Science Ltd, London",
journal = "Journal of Environmental Management",
title = "Removal of non-steroidal anti-inflammatory drugs from water by zeolite-rich composites: The interference of inorganic anions on the ibuprofen and naproxen adsorption",
volume = "286",
doi = "10.1016/j.jenvman.2021.112168",
url = "conv_905"
}

Smiljanić, D., de Gennaro, B., Daković, A., Galzerano, B., Germinario, C., Izzo, F., Rottinghaus, G. E.,& Langella, A.. (2021). Removal of non-steroidal anti-inflammatory drugs from water by zeolite-rich composites: The interference of inorganic anions on the ibuprofen and naproxen adsorption. in Journal of Environmental Management
Academic Press Ltd- Elsevier Science Ltd, London., 286.
https://doi.org/10.1016/j.jenvman.2021.112168
conv_905

Smiljanić D, de Gennaro B, Daković A, Galzerano B, Germinario C, Izzo F, Rottinghaus GE, Langella A. Removal of non-steroidal anti-inflammatory drugs from water by zeolite-rich composites: The interference of inorganic anions on the ibuprofen and naproxen adsorption. in Journal of Environmental Management. 2021;286.
doi:10.1016/j.jenvman.2021.112168
conv_905 .

Smiljanić, Danijela, de Gennaro, Bruno, Daković, Aleksandra, Galzerano, Barbara, Germinario, Chiara, Izzo, Francesco, Rottinghaus, George E., Langella, Alessio, "Removal of non-steroidal anti-inflammatory drugs from water by zeolite-rich composites: The interference of inorganic anions on the ibuprofen and naproxen adsorption" in Journal of Environmental Management, 286 (2021),
https://doi.org/10.1016/j.jenvman.2021.112168 .,
conv_905 .

TY  - JOUR
AU  - Spasojević, Milica
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Obradović, Milena
AU  - Krajišnik, Danina
AU  - Marković, Marija
AU  - Krstić, Jugoslav
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/573
AB  - A natural kaolin from Serbia was modified with different amounts of octadecyldimethylbenzyl ammonium (ODMBA) - (25, 50 and 90% of kaolin cation exchange capacity). Samples were denoted as OKR-25, OKR-50 and OKR-90. Several methods (FTIR spectroscopy, thermal analysis, zeta potential measurements, and N2 physisorption) were used for characterization of the organokaolinites. Adsorption of the common mycotoxins ochratoxin A (OCHRA) and zearalenone (ZEN) by the organokaolinites was investigated at different levels of solid phase in suspension, different initial mycotoxin concentrations and different pH values. The natural kaolin was not effective in binding OCHRA or ZEN. Adsorption of both mycotoxins by organokaolinites increased with increasing amounts of solid phase as well as with increasing levels of surfactant on the kaolin surface. OCHRA and ZEN adsorption by all organokaolinites followed non-linear adsorption isotherms, at pH 3, 7 and 9. The maximum adsorption capacity for OCHRA adsorption was at pH 3 (4.8 mg/g for OKR-25, 26.7 mg/g for OKR-50 and 39.2 mg/g for OKR-90) that was calculated from the Langmuir model. Much lower OCHRA adsorption capacities were found at pH 7 and 9 (from 0.8 mg/g to 6.9 mg/g at pH 7 and from 1.1 mg/g to 4.6 mg/g at pH 9). The following adsorption capacities for ZEN were obtained from the Langmuir isotherms, at pH 3: 4.5 mg/g for OKR-25, 12.0 mg/g for OKR-50 and 13.5 mg/g for OKR-90. At pH 7, adsorption of ZEN was 5.7 mg/g for OKR25, 15.3 mg/g for OKR-90 and 14. 4 mg/g for OKR-90. At pH 9, ZEN adsorption capacities were 2.4, 14.1 and 8.1 mg/g for OKR-25, OKR-50 and OKR-90, respectively. Thus, at the lowest amount of ODMBA at the kaolin surface, adsorption of ZEN was similar at pH 3 and 7, while a slightly lower value was obtained for its adsorption at pH 9. With increasing amounts of organic phase at the kaolin surface, the adsorption of ZEN was practically independent of pH. Adsorption of both mycotoxins was dependent on the amount of ODMBA ions at the kaolin surface as well as on their forms in solution.
PB  - Elsevier, Amsterdam
T2  - Applied Clay Science
T1  - Influence of surface coverage of kaolin with surfactant ions on adsorption of ochratoxin A and zearalenone
VL  - 205
DO  - 10.1016/j.clay.2021.106040
UR  - conv_909
ER  - 

@article{
author = "Spasojević, Milica and Daković, Aleksandra and Rottinghaus, George E. and Obradović, Milena and Krajišnik, Danina and Marković, Marija and Krstić, Jugoslav",
year = "2021",
abstract = "A natural kaolin from Serbia was modified with different amounts of octadecyldimethylbenzyl ammonium (ODMBA) - (25, 50 and 90% of kaolin cation exchange capacity). Samples were denoted as OKR-25, OKR-50 and OKR-90. Several methods (FTIR spectroscopy, thermal analysis, zeta potential measurements, and N2 physisorption) were used for characterization of the organokaolinites. Adsorption of the common mycotoxins ochratoxin A (OCHRA) and zearalenone (ZEN) by the organokaolinites was investigated at different levels of solid phase in suspension, different initial mycotoxin concentrations and different pH values. The natural kaolin was not effective in binding OCHRA or ZEN. Adsorption of both mycotoxins by organokaolinites increased with increasing amounts of solid phase as well as with increasing levels of surfactant on the kaolin surface. OCHRA and ZEN adsorption by all organokaolinites followed non-linear adsorption isotherms, at pH 3, 7 and 9. The maximum adsorption capacity for OCHRA adsorption was at pH 3 (4.8 mg/g for OKR-25, 26.7 mg/g for OKR-50 and 39.2 mg/g for OKR-90) that was calculated from the Langmuir model. Much lower OCHRA adsorption capacities were found at pH 7 and 9 (from 0.8 mg/g to 6.9 mg/g at pH 7 and from 1.1 mg/g to 4.6 mg/g at pH 9). The following adsorption capacities for ZEN were obtained from the Langmuir isotherms, at pH 3: 4.5 mg/g for OKR-25, 12.0 mg/g for OKR-50 and 13.5 mg/g for OKR-90. At pH 7, adsorption of ZEN was 5.7 mg/g for OKR25, 15.3 mg/g for OKR-90 and 14. 4 mg/g for OKR-90. At pH 9, ZEN adsorption capacities were 2.4, 14.1 and 8.1 mg/g for OKR-25, OKR-50 and OKR-90, respectively. Thus, at the lowest amount of ODMBA at the kaolin surface, adsorption of ZEN was similar at pH 3 and 7, while a slightly lower value was obtained for its adsorption at pH 9. With increasing amounts of organic phase at the kaolin surface, the adsorption of ZEN was practically independent of pH. Adsorption of both mycotoxins was dependent on the amount of ODMBA ions at the kaolin surface as well as on their forms in solution.",
publisher = "Elsevier, Amsterdam",
journal = "Applied Clay Science",
title = "Influence of surface coverage of kaolin with surfactant ions on adsorption of ochratoxin A and zearalenone",
volume = "205",
doi = "10.1016/j.clay.2021.106040",
url = "conv_909"
}

Spasojević, M., Daković, A., Rottinghaus, G. E., Obradović, M., Krajišnik, D., Marković, M.,& Krstić, J.. (2021). Influence of surface coverage of kaolin with surfactant ions on adsorption of ochratoxin A and zearalenone. in Applied Clay Science
Elsevier, Amsterdam., 205.
https://doi.org/10.1016/j.clay.2021.106040
conv_909

Spasojević M, Daković A, Rottinghaus GE, Obradović M, Krajišnik D, Marković M, Krstić J. Influence of surface coverage of kaolin with surfactant ions on adsorption of ochratoxin A and zearalenone. in Applied Clay Science. 2021;205.
doi:10.1016/j.clay.2021.106040
conv_909 .

Spasojević, Milica, Daković, Aleksandra, Rottinghaus, George E., Obradović, Milena, Krajišnik, Danina, Marković, Marija, Krstić, Jugoslav, "Influence of surface coverage of kaolin with surfactant ions on adsorption of ochratoxin A and zearalenone" in Applied Clay Science, 205 (2021),
https://doi.org/10.1016/j.clay.2021.106040 .,
conv_909 .

TY  - JOUR
AU  - Smiljanić, Danijela
AU  - de Gennaro, Bruno
AU  - Izzo, Francesco
AU  - Langella, Alessio
AU  - Daković, Aleksandra
AU  - Germinario, Chiara
AU  - Rottinghaus, George E.
AU  - Spasojević, Milica
AU  - Mercurio, Mariano
PY  - 2020
UR  - https://ritnms.itnms.ac.rs/handle/123456789/556
AB  - In this study, composites of the natural zeolites and cationic surfactants cetylpyridinium chloride and Arquad (R) 2HT-75 were used for removal of two emerging contaminants - diclofenac sodium and ketopmfen. Modifying a clinoptilolite- and a phillipsite-rich tuff, with surfactants with one or two hydrophobic tails, resulted in composites in monolayer and bilayer forms. The intention was to better evaluate interactions of composites with selected molecules. Starting materials and composites were characterized by ATR-FTIR and STA coupled with EGA. The adsorption capacities of the prepared sorbents were estimated by determination of adsorption isotherms and kinetic runs. Maximum adsorption capacity, obtained from the Langmuir model, showed that the best results were for the bilayer form of the composites up to 35 mg/g. Between the two surfactants, composites with cetylpyridinium chloride gave better results. Zeta potential measurements showed that the surfactants turned out to be unstable on the zeolite surface, the only exception being bilayers prepared using the two-tailed surfactant Arquad (R) 2HT-75. These results suggested possible applications of these composites for water treatment purposes.
PB  - Elsevier, Amsterdam
T2  - Microporous and Mesoporous Materials
T1  - Removal of emerging contaminants from water by zeolite-rich composites: A first approach aiming at diclofenac and ketoprofen
VL  - 298
DO  - 10.1016/j.micromeso.2020.110057
UR  - conv_879
ER  - 

@article{
author = "Smiljanić, Danijela and de Gennaro, Bruno and Izzo, Francesco and Langella, Alessio and Daković, Aleksandra and Germinario, Chiara and Rottinghaus, George E. and Spasojević, Milica and Mercurio, Mariano",
year = "2020",
abstract = "In this study, composites of the natural zeolites and cationic surfactants cetylpyridinium chloride and Arquad (R) 2HT-75 were used for removal of two emerging contaminants - diclofenac sodium and ketopmfen. Modifying a clinoptilolite- and a phillipsite-rich tuff, with surfactants with one or two hydrophobic tails, resulted in composites in monolayer and bilayer forms. The intention was to better evaluate interactions of composites with selected molecules. Starting materials and composites were characterized by ATR-FTIR and STA coupled with EGA. The adsorption capacities of the prepared sorbents were estimated by determination of adsorption isotherms and kinetic runs. Maximum adsorption capacity, obtained from the Langmuir model, showed that the best results were for the bilayer form of the composites up to 35 mg/g. Between the two surfactants, composites with cetylpyridinium chloride gave better results. Zeta potential measurements showed that the surfactants turned out to be unstable on the zeolite surface, the only exception being bilayers prepared using the two-tailed surfactant Arquad (R) 2HT-75. These results suggested possible applications of these composites for water treatment purposes.",
publisher = "Elsevier, Amsterdam",
journal = "Microporous and Mesoporous Materials",
title = "Removal of emerging contaminants from water by zeolite-rich composites: A first approach aiming at diclofenac and ketoprofen",
volume = "298",
doi = "10.1016/j.micromeso.2020.110057",
url = "conv_879"
}

Smiljanić, D., de Gennaro, B., Izzo, F., Langella, A., Daković, A., Germinario, C., Rottinghaus, G. E., Spasojević, M.,& Mercurio, M.. (2020). Removal of emerging contaminants from water by zeolite-rich composites: A first approach aiming at diclofenac and ketoprofen. in Microporous and Mesoporous Materials
Elsevier, Amsterdam., 298.
https://doi.org/10.1016/j.micromeso.2020.110057
conv_879

Smiljanić D, de Gennaro B, Izzo F, Langella A, Daković A, Germinario C, Rottinghaus GE, Spasojević M, Mercurio M. Removal of emerging contaminants from water by zeolite-rich composites: A first approach aiming at diclofenac and ketoprofen. in Microporous and Mesoporous Materials. 2020;298.
doi:10.1016/j.micromeso.2020.110057
conv_879 .

Smiljanić, Danijela, de Gennaro, Bruno, Izzo, Francesco, Langella, Alessio, Daković, Aleksandra, Germinario, Chiara, Rottinghaus, George E., Spasojević, Milica, Mercurio, Mariano, "Removal of emerging contaminants from water by zeolite-rich composites: A first approach aiming at diclofenac and ketoprofen" in Microporous and Mesoporous Materials, 298 (2020),
https://doi.org/10.1016/j.micromeso.2020.110057 .,
conv_879 .

TY  - CONF
AU  - Spasojević, Milica
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Obradović, Milena
AU  - Krajišnik, Danina
AU  - Mercurio, Mariano
AU  - Smiljanić, Danijela
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/739
AB  - Zeolite – phillipsite was modified with long chain organic surfactant – hexadecyltrimethyl-ammonium bromide (HB). Two different amounts of HB were used to modify the zeolitic surface (150 % and 200% of phillisite external exchange capacity - ECEC). Adsorption of non-steroidal antiinflam matory drug – ibuprofen (IBU) was studied at pH 7, at different initial drug concentrations. Adsorption increased with increasing the initial drug concentrations as well as with increasing amounts of organic phase at the phillipsite surface. From the Langmuir model, the maximum IBU adsorption capacity for phillipsite modified with surfactant at 150 % of ECEC was 12.72 mg/g, while for organophillipsite containing surfactant in amount of 200 % of ECEC, the maximum adsorption capacity was 18.25 mg/g.
PB  - Serbian Zeolite Association
C3  - 8th Serbian-Croatian-Slovenian Symposium on Zeolites
T1  - Organophillipsite as potential low cost adsorbent for removal of ibuprofen
EP  - 125
SP  - 122
ER  - 

@conference{
author = "Spasojević, Milica and Daković, Aleksandra and Rottinghaus, George E. and Obradović, Milena and Krajišnik, Danina and Mercurio, Mariano and Smiljanić, Danijela",
year = "2019",
abstract = "Zeolite – phillipsite was modified with long chain organic surfactant – hexadecyltrimethyl-ammonium bromide (HB). Two different amounts of HB were used to modify the zeolitic surface (150 % and 200% of phillisite external exchange capacity - ECEC). Adsorption of non-steroidal antiinflam matory drug – ibuprofen (IBU) was studied at pH 7, at different initial drug concentrations. Adsorption increased with increasing the initial drug concentrations as well as with increasing amounts of organic phase at the phillipsite surface. From the Langmuir model, the maximum IBU adsorption capacity for phillipsite modified with surfactant at 150 % of ECEC was 12.72 mg/g, while for organophillipsite containing surfactant in amount of 200 % of ECEC, the maximum adsorption capacity was 18.25 mg/g.",
publisher = "Serbian Zeolite Association",
journal = "8th Serbian-Croatian-Slovenian Symposium on Zeolites",
title = "Organophillipsite as potential low cost adsorbent for removal of ibuprofen",
pages = "125-122"
}

Spasojević, M., Daković, A., Rottinghaus, G. E., Obradović, M., Krajišnik, D., Mercurio, M.,& Smiljanić, D.. (2019). Organophillipsite as potential low cost adsorbent for removal of ibuprofen. in 8th Serbian-Croatian-Slovenian Symposium on Zeolites
Serbian Zeolite Association., 122-125.

Spasojević M, Daković A, Rottinghaus GE, Obradović M, Krajišnik D, Mercurio M, Smiljanić D. Organophillipsite as potential low cost adsorbent for removal of ibuprofen. in 8th Serbian-Croatian-Slovenian Symposium on Zeolites. 2019;:122-125..

Spasojević, Milica, Daković, Aleksandra, Rottinghaus, George E., Obradović, Milena, Krajišnik, Danina, Mercurio, Mariano, Smiljanić, Danijela, "Organophillipsite as potential low cost adsorbent for removal of ibuprofen" in 8th Serbian-Croatian-Slovenian Symposium on Zeolites (2019):122-125.

TY  - CONF
AU  - Obradović, Milena
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Spasojević, Milica
AU  - Marković, Marija
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/737
AB  - The contamination of the natural aquatic environment by pharmaceuticals is a serious environmental problem due to their extensive use in human health and animal husbandry. One of the most efficient technique for removal of pharmaceuticals from water is their adsorption on activated carbons, clays and zeolites. In this study adsorption of ketoprofen (KETO), widely used non-steroidal anti-inflammatory drug, on modified kaolin was invesitgated. The natural kaolin (from Rgotina, Serbia) was modified with cationic surfactant hexadecyltrimethyl ammonium bromide in amounts equivalent to 50% and 90% of kaolin cationic exchange capacity. FTIR and DTA/TGA were used for characterisation of materials. The obtained data showed that adsorption of KETO by modified kaolin increased with increasing the amount of surfactant, as well as with increasing the amount of solid phase in the suspension (0.5 – 5.0 mg/ml). According to obtained results modified kaolin may be used as adsobent for removal of KETO from contaminated water.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Eighteenth Young Researchers’ Conference Materials Science and Engineering
T1  - Kaolin modified with cationic surfactant as a potential adsorbent for ketoprofen
EP  - 85
SP  - 85
ER  - 

@conference{
author = "Obradović, Milena and Daković, Aleksandra and Rottinghaus, George E. and Spasojević, Milica and Marković, Marija",
year = "2019",
abstract = "The contamination of the natural aquatic environment by pharmaceuticals is a serious environmental problem due to their extensive use in human health and animal husbandry. One of the most efficient technique for removal of pharmaceuticals from water is their adsorption on activated carbons, clays and zeolites. In this study adsorption of ketoprofen (KETO), widely used non-steroidal anti-inflammatory drug, on modified kaolin was invesitgated. The natural kaolin (from Rgotina, Serbia) was modified with cationic surfactant hexadecyltrimethyl ammonium bromide in amounts equivalent to 50% and 90% of kaolin cationic exchange capacity. FTIR and DTA/TGA were used for characterisation of materials. The obtained data showed that adsorption of KETO by modified kaolin increased with increasing the amount of surfactant, as well as with increasing the amount of solid phase in the suspension (0.5 – 5.0 mg/ml). According to obtained results modified kaolin may be used as adsobent for removal of KETO from contaminated water.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Eighteenth Young Researchers’ Conference Materials Science and Engineering",
title = "Kaolin modified with cationic surfactant as a potential adsorbent for ketoprofen",
pages = "85-85"
}

Obradović, M., Daković, A., Rottinghaus, G. E., Spasojević, M.,& Marković, M.. (2019). Kaolin modified with cationic surfactant as a potential adsorbent for ketoprofen. in Eighteenth Young Researchers’ Conference Materials Science and Engineering
Belgrade : Institute of Technical Sciences of SASA., 85-85.

Obradović M, Daković A, Rottinghaus GE, Spasojević M, Marković M. Kaolin modified with cationic surfactant as a potential adsorbent for ketoprofen. in Eighteenth Young Researchers’ Conference Materials Science and Engineering. 2019;:85-85..

Obradović, Milena, Daković, Aleksandra, Rottinghaus, George E., Spasojević, Milica, Marković, Marija, "Kaolin modified with cationic surfactant as a potential adsorbent for ketoprofen" in Eighteenth Young Researchers’ Conference Materials Science and Engineering (2019):85-85.

TY  - JOUR
AU  - Spasojević, Milica
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Radosavljević-Mihajlović, Ana
AU  - Marković, Marija
AU  - Krajišnik, Danina
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/527
AB  - Octadecyldimethylbenzyl ammonium chloride (OA) was used as a surfactant for the preparation of organokaolin. The natural kaolin (from a plant for production of quartz sand in Rgotina, Serbia) was modified with a surfactant in amount equal to 90% of the kaolin cation exchange capacity (CEC). FTIR spectroscopy was used for characterization of the new product. FTIR spectra confirmed the presence of OA ions at the kaolin surface. Adsorption of mycotoxins - zearalenone (ZEN) and ochratoxin A (OCHRA) was studied by organokaolin at different amounts of adsorbent and pHs. Results showed that the presence of organic cations in the kaolin structure increased adsorption of both ZEN and OCHRA. Adsorption of the mycotoxins by organokaolin increased with increasing amounts of adsorbent and, at the lowest amount of solids in suspension, adsorption of ZEN and OCHRA was slightly higher at pH 7 and 9.
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metallurgical & Materials Engineering
T1  - Zearalenone and ochratoxin a: adsorption by kaolin modified with surfactant
EP  - 45
IS  - 1
SP  - 39
VL  - 25
DO  - 10.30544/413
UR  - conv_848
ER  - 

@article{
author = "Spasojević, Milica and Daković, Aleksandra and Rottinghaus, George E. and Radosavljević-Mihajlović, Ana and Marković, Marija and Krajišnik, Danina",
year = "2019",
abstract = "Octadecyldimethylbenzyl ammonium chloride (OA) was used as a surfactant for the preparation of organokaolin. The natural kaolin (from a plant for production of quartz sand in Rgotina, Serbia) was modified with a surfactant in amount equal to 90% of the kaolin cation exchange capacity (CEC). FTIR spectroscopy was used for characterization of the new product. FTIR spectra confirmed the presence of OA ions at the kaolin surface. Adsorption of mycotoxins - zearalenone (ZEN) and ochratoxin A (OCHRA) was studied by organokaolin at different amounts of adsorbent and pHs. Results showed that the presence of organic cations in the kaolin structure increased adsorption of both ZEN and OCHRA. Adsorption of the mycotoxins by organokaolin increased with increasing amounts of adsorbent and, at the lowest amount of solids in suspension, adsorption of ZEN and OCHRA was slightly higher at pH 7 and 9.",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metallurgical & Materials Engineering",
title = "Zearalenone and ochratoxin a: adsorption by kaolin modified with surfactant",
pages = "45-39",
number = "1",
volume = "25",
doi = "10.30544/413",
url = "conv_848"
}

Spasojević, M., Daković, A., Rottinghaus, G. E., Radosavljević-Mihajlović, A., Marković, M.,& Krajišnik, D.. (2019). Zearalenone and ochratoxin a: adsorption by kaolin modified with surfactant. in Metallurgical & Materials Engineering
Savez inženjera metalurgije Srbije, Beograd., 25(1), 39-45.
https://doi.org/10.30544/413
conv_848

Spasojević M, Daković A, Rottinghaus GE, Radosavljević-Mihajlović A, Marković M, Krajišnik D. Zearalenone and ochratoxin a: adsorption by kaolin modified with surfactant. in Metallurgical & Materials Engineering. 2019;25(1):39-45.
doi:10.30544/413
conv_848 .

Spasojević, Milica, Daković, Aleksandra, Rottinghaus, George E., Radosavljević-Mihajlović, Ana, Marković, Marija, Krajišnik, Danina, "Zearalenone and ochratoxin a: adsorption by kaolin modified with surfactant" in Metallurgical & Materials Engineering, 25, no. 1 (2019):39-45,
https://doi.org/10.30544/413 .,
conv_848 .

TY  - CONF
AU  - Marković, Marija
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Krajišnik, Danina
AU  - Milić, Jela
AU  - Mercurio, Mariano
PY  - 2018
UR  - https://ritnms.itnms.ac.rs/handle/123456789/703
AB  - Introduction
Mycotoxins are secondary metabolites produced by various fungi, primarily belonging to Aspergillus, Fusarium, or Penicillium genera. The most common mycotoxins found in animal feed are the aflatoxins, ochratoxins, trichothecenes, fumonisins, zearalenone and ergot alkaloids. Consumption of mycotoxin-contaminated diet may induce acute and long-term chronic effects in animals and humans, resulting in teratogenic, carcinogenic and oestrogenic or immune-suppressive effects (Zhu et al., 2016).
One approach to reduce deleterious effects of mycotoxins is to use adsorbents in animal feed to bind mycotoxins efficiently in the gastrointestinal tract and prevent their adsorption in the digestive tract. The preferred adsorbents are aluminosilicates (natural zeolites and clay minerals). These adsorbents in their natural form are effective in binding aflatoxins but less effective in binding other mycotoxins. Chemical modification of these minerals with cationic surfactants results in an increased hydrophobicity of the surface and improved adsorption for the majority of the mycotoxins. Clinoptilolite, in its natural form, was effective in adsorbing aflatoxin B1 (AFB1), while clinoptilolite modified with cationic surfactants such as octadecyldimethylbenzyl ammonium chloride and benzalkonium chloride was effective in binding ochratoxin A (OCHRA) and zearalenone (ZEN) (Daković et al., 2005; Marković et al., 2017). Besides clinoptilolite, phillipsite modified with different levels of cetylpyridinium chloride was also shown to be an effective adsorbent for ZEN (Marković et al, 2017). Since adsorption of mycotoxins may be dependent on the type of surfactant, the aim of this research was to investigate how the modification of phillipsite with surfactant hexadecyltrimethyl ammonium bromide (HDTMA) would influence the adsorption of AFB1, OCHRA and ZEN.
Experimental Methods
A sample of Neapolitan Yellow Tuff (Campania, Italy) composed primarily of phillipsite (PHI), was used as starting material. The modified sample was prepared by treatment of a 10% aqueous suspension of starting material with the surfactant hexadecyltrimethyl ammonium bromide (HDTMA) in an amount equivalent to 100% of its external cation exchange capacity (ECEC) and denoted as PHB-100.
Mycotoxins, AFB1, OCHRA and ZEN were obtained from Sigma-Aldrich Co. Adsorption experiments were performed using the following procedure: duplicate aliquots of 0.1M phosphate buffer (pH 3 and 7) containing 2 ppm AFB1, 2 ppm OCHRA and 2 ppm ZEN in solution (10 mL) were added to 15 mL screw cap Falcon polypropylene tubes to which had been added 20, 10, 5 or 2 mg of PHI and PHB-100. In order to eliminate exogenous peaks, controls were prepared by adding 10 mL of 0.1 M phosphate buffer (pH 3 and 7) to Falcon tubes containing 10 mg of each adsorbent. All samples were placed on a rotating shaker for 30 min at room temperature, centrifuged for 5 min at 13000 rpm and 2 mL of the aqueous supernatant was removed for HPLC analysis.
Results and Discussion
Adsorption of AFB1, OCHRA and ZEN by PHI and PHB-100 at different pH values is presented in Figures 1 and 2. Adsorption of each mycotoxin increased with increasing amounts of PHI and PHB-100 in suspension. PHI showed a high adsorption for AFB1 at pH 3 and moderate adsorption at pH 7, while
adsorption of OCHRA and ZEN by PHI was low at both pH values (less than 10% for OCHRA and less than
20% for ZEN). Modified phillipsite showed increased adsorption for each mycotoxin at all investigated
amounts of adsorbents. Compared to the PHI, adsorption of AFB1 by PHB-100 was slightly increased at
pH 3 (from 80.0% for PHI to 85.2% for PHB-100), while a higher increase was observed at pH 7 (from
51.9% for PHI to 81.5% for PHB-100). A much higher increase in adsorption by PHB-100 was observed for
OCHRA and ZEN at both pH values. In conclusion both PHI and PHB-100 were efficient in the adsorption of AFB1 at pH 3, while the
presence of HDTMA at the zeolitic surface increased adsorption of AFB1 at pH 7. Unmodified PHI showed
low adsorption of OCHRA and ZEN at both pH values, while modification of phillipsite with HDTMA ions
significantly increased adsorption of both these mycotoxins.
PB  - Lublin : Lublin University of Technology
C3  - ZEOLITE 2018 - 10th International Conference on the Occurrence, Properties and Utilization of Natural Zeolites
T1  - Adsorption of mycotoxins by unmodified and modified phillipsite
EP  - 62
SP  - 61
ER  - 

@conference{
author = "Marković, Marija and Daković, Aleksandra and Rottinghaus, George E. and Krajišnik, Danina and Milić, Jela and Mercurio, Mariano",
year = "2018",
abstract = "Introduction
Mycotoxins are secondary metabolites produced by various fungi, primarily belonging to Aspergillus, Fusarium, or Penicillium genera. The most common mycotoxins found in animal feed are the aflatoxins, ochratoxins, trichothecenes, fumonisins, zearalenone and ergot alkaloids. Consumption of mycotoxin-contaminated diet may induce acute and long-term chronic effects in animals and humans, resulting in teratogenic, carcinogenic and oestrogenic or immune-suppressive effects (Zhu et al., 2016).
One approach to reduce deleterious effects of mycotoxins is to use adsorbents in animal feed to bind mycotoxins efficiently in the gastrointestinal tract and prevent their adsorption in the digestive tract. The preferred adsorbents are aluminosilicates (natural zeolites and clay minerals). These adsorbents in their natural form are effective in binding aflatoxins but less effective in binding other mycotoxins. Chemical modification of these minerals with cationic surfactants results in an increased hydrophobicity of the surface and improved adsorption for the majority of the mycotoxins. Clinoptilolite, in its natural form, was effective in adsorbing aflatoxin B1 (AFB1), while clinoptilolite modified with cationic surfactants such as octadecyldimethylbenzyl ammonium chloride and benzalkonium chloride was effective in binding ochratoxin A (OCHRA) and zearalenone (ZEN) (Daković et al., 2005; Marković et al., 2017). Besides clinoptilolite, phillipsite modified with different levels of cetylpyridinium chloride was also shown to be an effective adsorbent for ZEN (Marković et al, 2017). Since adsorption of mycotoxins may be dependent on the type of surfactant, the aim of this research was to investigate how the modification of phillipsite with surfactant hexadecyltrimethyl ammonium bromide (HDTMA) would influence the adsorption of AFB1, OCHRA and ZEN.
Experimental Methods
A sample of Neapolitan Yellow Tuff (Campania, Italy) composed primarily of phillipsite (PHI), was used as starting material. The modified sample was prepared by treatment of a 10% aqueous suspension of starting material with the surfactant hexadecyltrimethyl ammonium bromide (HDTMA) in an amount equivalent to 100% of its external cation exchange capacity (ECEC) and denoted as PHB-100.
Mycotoxins, AFB1, OCHRA and ZEN were obtained from Sigma-Aldrich Co. Adsorption experiments were performed using the following procedure: duplicate aliquots of 0.1M phosphate buffer (pH 3 and 7) containing 2 ppm AFB1, 2 ppm OCHRA and 2 ppm ZEN in solution (10 mL) were added to 15 mL screw cap Falcon polypropylene tubes to which had been added 20, 10, 5 or 2 mg of PHI and PHB-100. In order to eliminate exogenous peaks, controls were prepared by adding 10 mL of 0.1 M phosphate buffer (pH 3 and 7) to Falcon tubes containing 10 mg of each adsorbent. All samples were placed on a rotating shaker for 30 min at room temperature, centrifuged for 5 min at 13000 rpm and 2 mL of the aqueous supernatant was removed for HPLC analysis.
Results and Discussion
Adsorption of AFB1, OCHRA and ZEN by PHI and PHB-100 at different pH values is presented in Figures 1 and 2. Adsorption of each mycotoxin increased with increasing amounts of PHI and PHB-100 in suspension. PHI showed a high adsorption for AFB1 at pH 3 and moderate adsorption at pH 7, while
adsorption of OCHRA and ZEN by PHI was low at both pH values (less than 10% for OCHRA and less than
20% for ZEN). Modified phillipsite showed increased adsorption for each mycotoxin at all investigated
amounts of adsorbents. Compared to the PHI, adsorption of AFB1 by PHB-100 was slightly increased at
pH 3 (from 80.0% for PHI to 85.2% for PHB-100), while a higher increase was observed at pH 7 (from
51.9% for PHI to 81.5% for PHB-100). A much higher increase in adsorption by PHB-100 was observed for
OCHRA and ZEN at both pH values. In conclusion both PHI and PHB-100 were efficient in the adsorption of AFB1 at pH 3, while the
presence of HDTMA at the zeolitic surface increased adsorption of AFB1 at pH 7. Unmodified PHI showed
low adsorption of OCHRA and ZEN at both pH values, while modification of phillipsite with HDTMA ions
significantly increased adsorption of both these mycotoxins.",
publisher = "Lublin : Lublin University of Technology",
journal = "ZEOLITE 2018 - 10th International Conference on the Occurrence, Properties and Utilization of Natural Zeolites",
title = "Adsorption of mycotoxins by unmodified and modified phillipsite",
pages = "62-61"
}

Marković, M., Daković, A., Rottinghaus, G. E., Krajišnik, D., Milić, J.,& Mercurio, M.. (2018). Adsorption of mycotoxins by unmodified and modified phillipsite. in ZEOLITE 2018 - 10th International Conference on the Occurrence, Properties and Utilization of Natural Zeolites
Lublin : Lublin University of Technology., 61-62.

Marković M, Daković A, Rottinghaus GE, Krajišnik D, Milić J, Mercurio M. Adsorption of mycotoxins by unmodified and modified phillipsite. in ZEOLITE 2018 - 10th International Conference on the Occurrence, Properties and Utilization of Natural Zeolites. 2018;:61-62..

Marković, Marija, Daković, Aleksandra, Rottinghaus, George E., Krajišnik, Danina, Milić, Jela, Mercurio, Mariano, "Adsorption of mycotoxins by unmodified and modified phillipsite" in ZEOLITE 2018 - 10th International Conference on the Occurrence, Properties and Utilization of Natural Zeolites (2018):61-62.

TY  - CONF
AU  - Marković, Marija
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Petković, Anđela
AU  - Mercurio, Mariano
AU  - de Gennaro, Bruno
AU  - Langella, Alessio
PY  - 2017
UR  - https://ritnms.itnms.ac.rs/handle/123456789/692
AB  - Two different surfactants, cetylpyridinum chloride (CP) and
hexadecyltrimethylammonium bromide (HDTMA) were used to modify the surface of a natural
zeolite - phillipsite (PHI) and adsorption of ochratoxin A (OCHRA) was investigated.
Adsorption experiments were done with different amounts of adsorbents and with different
initial OCHRA concentrations at pH 3 and pH 7. Results showed that modification of phillipsite
surface with CP and HDTMA significantly improved adsorption of OCHRA in comparison to
unmodified phillipsite. CP modified phillipsite showed similar adsorption behavior as HDTMA
modified phillipsite. The highest adsorption capacity for OCHRA was obtained with CP
modified phillipsite at pH 3.
PB  - Croatian Zeolite Association
C3  - 7th Slovenian-Serbian-Croatian Symposium on Zeolites
T1  - Adsorption of ochratoxin A by surfactant modified phillipsite
EP  - 106
SP  - 103
ER  - 

@conference{
author = "Marković, Marija and Daković, Aleksandra and Rottinghaus, George E. and Petković, Anđela and Mercurio, Mariano and de Gennaro, Bruno and Langella, Alessio",
year = "2017",
abstract = "Two different surfactants, cetylpyridinum chloride (CP) and
hexadecyltrimethylammonium bromide (HDTMA) were used to modify the surface of a natural
zeolite - phillipsite (PHI) and adsorption of ochratoxin A (OCHRA) was investigated.
Adsorption experiments were done with different amounts of adsorbents and with different
initial OCHRA concentrations at pH 3 and pH 7. Results showed that modification of phillipsite
surface with CP and HDTMA significantly improved adsorption of OCHRA in comparison to
unmodified phillipsite. CP modified phillipsite showed similar adsorption behavior as HDTMA
modified phillipsite. The highest adsorption capacity for OCHRA was obtained with CP
modified phillipsite at pH 3.",
publisher = "Croatian Zeolite Association",
journal = "7th Slovenian-Serbian-Croatian Symposium on Zeolites",
title = "Adsorption of ochratoxin A by surfactant modified phillipsite",
pages = "106-103"
}

Marković, M., Daković, A., Rottinghaus, G. E., Petković, A., Mercurio, M., de Gennaro, B.,& Langella, A.. (2017). Adsorption of ochratoxin A by surfactant modified phillipsite. in 7th Slovenian-Serbian-Croatian Symposium on Zeolites
Croatian Zeolite Association., 103-106.

Marković M, Daković A, Rottinghaus GE, Petković A, Mercurio M, de Gennaro B, Langella A. Adsorption of ochratoxin A by surfactant modified phillipsite. in 7th Slovenian-Serbian-Croatian Symposium on Zeolites. 2017;:103-106..

Marković, Marija, Daković, Aleksandra, Rottinghaus, George E., Petković, Anđela, Mercurio, Mariano, de Gennaro, Bruno, Langella, Alessio, "Adsorption of ochratoxin A by surfactant modified phillipsite" in 7th Slovenian-Serbian-Croatian Symposium on Zeolites (2017):103-106.

TY  - JOUR
AU  - Marković, Marija
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Petković, Anđela
AU  - Kragović, Milan
AU  - Krajišnik, Danina
AU  - Milić, Jela
PY  - 2017
UR  - https://ritnms.itnms.ac.rs/handle/123456789/438
AB  - Benzalkonium chloride - BC (the mixture of alkylbenzyldimethylammonium chlorides containing the alkyl groups having chain lengths of C8 to C18 and benzyl functional group) was used as a surfactant for production of organozeolites (BZs). The natural zeolite - clinoptilolite was modified with three different levels (2, 5 and 10 mmol/100 g) of BC. FTIR spectroscopy, thermal analysis, zeta potential measurements, determination of the point of zero charge and BET were used to determine the quantity of the surfactant at the zeolitic surface. The main aim was to investigate adsorption properties of BZs towards ochratoxin A (OCHRA) and zearalenone (ZEN) under in vitro conditions. Results showed that adsorption of OCHRA and ZEN by BZs increased with increasing amounts of BC at the zeolitic surface but the adsorption mechanism was different. Adsorption of OCHRA by BZs followed nonlinear isotherms at pH 3 and 7, and higher adsorption capacity was observed at pH 3. This indicates that adsorption was dependent on the form of OCHRA in solution and that the sites at the uncovered zeolitic surface together with the surfactants contributed to OCHRA adsorption. Adsorption of ZEN by BZs showed linear isotherms at pH 3 and 7 and similar amounts were adsorbed at both pH values. This suggests that adsorption is practically independent of the form of ZEN in solution and that organic cations at the zeolitic surface are the active sites relevant for ZEN adsorption.
PB  - Elsevier, Amsterdam
T2  - Colloids and Surfaces A-Physicochemical and Engineering Aspects
T1  - Ochratoxin A and zearalenone adsorption by the natural zeolite treated with benzalkonium chloride
EP  - 17
SP  - 7
VL  - 529
DO  - 10.1016/j.colsurfa.2017.05.054
UR  - conv_802
ER  - 

@article{
author = "Marković, Marija and Daković, Aleksandra and Rottinghaus, George E. and Petković, Anđela and Kragović, Milan and Krajišnik, Danina and Milić, Jela",
year = "2017",
abstract = "Benzalkonium chloride - BC (the mixture of alkylbenzyldimethylammonium chlorides containing the alkyl groups having chain lengths of C8 to C18 and benzyl functional group) was used as a surfactant for production of organozeolites (BZs). The natural zeolite - clinoptilolite was modified with three different levels (2, 5 and 10 mmol/100 g) of BC. FTIR spectroscopy, thermal analysis, zeta potential measurements, determination of the point of zero charge and BET were used to determine the quantity of the surfactant at the zeolitic surface. The main aim was to investigate adsorption properties of BZs towards ochratoxin A (OCHRA) and zearalenone (ZEN) under in vitro conditions. Results showed that adsorption of OCHRA and ZEN by BZs increased with increasing amounts of BC at the zeolitic surface but the adsorption mechanism was different. Adsorption of OCHRA by BZs followed nonlinear isotherms at pH 3 and 7, and higher adsorption capacity was observed at pH 3. This indicates that adsorption was dependent on the form of OCHRA in solution and that the sites at the uncovered zeolitic surface together with the surfactants contributed to OCHRA adsorption. Adsorption of ZEN by BZs showed linear isotherms at pH 3 and 7 and similar amounts were adsorbed at both pH values. This suggests that adsorption is practically independent of the form of ZEN in solution and that organic cations at the zeolitic surface are the active sites relevant for ZEN adsorption.",
publisher = "Elsevier, Amsterdam",
journal = "Colloids and Surfaces A-Physicochemical and Engineering Aspects",
title = "Ochratoxin A and zearalenone adsorption by the natural zeolite treated with benzalkonium chloride",
pages = "17-7",
volume = "529",
doi = "10.1016/j.colsurfa.2017.05.054",
url = "conv_802"
}

Marković, M., Daković, A., Rottinghaus, G. E., Petković, A., Kragović, M., Krajišnik, D.,& Milić, J.. (2017). Ochratoxin A and zearalenone adsorption by the natural zeolite treated with benzalkonium chloride. in Colloids and Surfaces A-Physicochemical and Engineering Aspects
Elsevier, Amsterdam., 529, 7-17.
https://doi.org/10.1016/j.colsurfa.2017.05.054
conv_802

Marković M, Daković A, Rottinghaus GE, Petković A, Kragović M, Krajišnik D, Milić J. Ochratoxin A and zearalenone adsorption by the natural zeolite treated with benzalkonium chloride. in Colloids and Surfaces A-Physicochemical and Engineering Aspects. 2017;529:7-17.
doi:10.1016/j.colsurfa.2017.05.054
conv_802 .

Marković, Marija, Daković, Aleksandra, Rottinghaus, George E., Petković, Anđela, Kragović, Milan, Krajišnik, Danina, Milić, Jela, "Ochratoxin A and zearalenone adsorption by the natural zeolite treated with benzalkonium chloride" in Colloids and Surfaces A-Physicochemical and Engineering Aspects, 529 (2017):7-17,
https://doi.org/10.1016/j.colsurfa.2017.05.054 .,
conv_802 .

TY  - JOUR
AU  - Shannon, T. A.
AU  - Ledoux, David R.
AU  - Rottinghaus, George E.
AU  - Shaw, D. P.
AU  - Daković, Aleksandra
AU  - Marković, Marija
PY  - 2017
UR  - https://ritnms.itnms.ac.rs/handle/123456789/431
AB  - The objective of this study was to evaluate the efficacy of two adsorbents, a raw bentonite clay (RC) and a concentrated bentonite clay (CC), in ameliorating the toxic effects of aflatoxin B1 (AFB1). Results of the in vitro study (pH 3.0) indicated the CC adsorbed more AFB1 than RC (93.39 mg/g vs. 79.30 mg/g) suggesting that CC may be more effective than RC in reducing the toxic effects of AFB1. One hundred and eighty day-old straight run broiler chicks were assigned to 6 replicate pens of 5 chicks each and assigned to 6 dietary treatments from hatch to day 21. Dietary treatments included: 1) basal diet (BD) containing no AFB1 or adsorbents; 2) BD plus 0.50% RC; 3) BD plus 0.50% CC; 4) BD plus 2.0 mg AFB1/kg; 5) BD plus 2.0 mg AFB1/kg plus 0.50% RC; and 6) BD plus 2.0 mg AFB 1/kg plus 0.50% CC. Dietary AFB1 concentrations were confirmed by analysis and diets were screened for other mycotoxins prior to the start of the experiment. The addition of AFB1 to the feed reduced (P  LT  0.05) growth performance and increased (P  LT  0.05) relative liver weight (RLW) and kidney weight (RKW) of chicks fed AFB1 compared to control chicks on day 21. These changes were ameliorated (P  LT  0.05) by the addition of RC and CC to the AFB1 diet. Mild to moderate lesions of aflatoxicosis (2.25) were observed in chicks fed AFB1 alone on day 21. The addition of both RC and CC to the AFB1 diet decreased (P  LT  0.05) but did not prevent liver lesions (0.92 and 1.42, respectively). Results indicate that both RC and CC were effective in reducing the toxic effects of AFB1, however the cost of processing of CC would make the RC a more economical product for reducing the effects of AFB1 in young broiler chicks.
PB  - Oxford Univ Press, Oxford
T2  - Poultry Science
T1  - The efficacy of raw and concentrated bentonite clay in reducing the toxic effects of aflatoxin in broiler chicks
EP  - 1658
IS  - 6
SP  - 1651
VL  - 96
DO  - 10.3382/ps/pew408
UR  - conv_797
ER  - 

@article{
author = "Shannon, T. A. and Ledoux, David R. and Rottinghaus, George E. and Shaw, D. P. and Daković, Aleksandra and Marković, Marija",
year = "2017",
abstract = "The objective of this study was to evaluate the efficacy of two adsorbents, a raw bentonite clay (RC) and a concentrated bentonite clay (CC), in ameliorating the toxic effects of aflatoxin B1 (AFB1). Results of the in vitro study (pH 3.0) indicated the CC adsorbed more AFB1 than RC (93.39 mg/g vs. 79.30 mg/g) suggesting that CC may be more effective than RC in reducing the toxic effects of AFB1. One hundred and eighty day-old straight run broiler chicks were assigned to 6 replicate pens of 5 chicks each and assigned to 6 dietary treatments from hatch to day 21. Dietary treatments included: 1) basal diet (BD) containing no AFB1 or adsorbents; 2) BD plus 0.50% RC; 3) BD plus 0.50% CC; 4) BD plus 2.0 mg AFB1/kg; 5) BD plus 2.0 mg AFB1/kg plus 0.50% RC; and 6) BD plus 2.0 mg AFB 1/kg plus 0.50% CC. Dietary AFB1 concentrations were confirmed by analysis and diets were screened for other mycotoxins prior to the start of the experiment. The addition of AFB1 to the feed reduced (P  LT  0.05) growth performance and increased (P  LT  0.05) relative liver weight (RLW) and kidney weight (RKW) of chicks fed AFB1 compared to control chicks on day 21. These changes were ameliorated (P  LT  0.05) by the addition of RC and CC to the AFB1 diet. Mild to moderate lesions of aflatoxicosis (2.25) were observed in chicks fed AFB1 alone on day 21. The addition of both RC and CC to the AFB1 diet decreased (P  LT  0.05) but did not prevent liver lesions (0.92 and 1.42, respectively). Results indicate that both RC and CC were effective in reducing the toxic effects of AFB1, however the cost of processing of CC would make the RC a more economical product for reducing the effects of AFB1 in young broiler chicks.",
publisher = "Oxford Univ Press, Oxford",
journal = "Poultry Science",
title = "The efficacy of raw and concentrated bentonite clay in reducing the toxic effects of aflatoxin in broiler chicks",
pages = "1658-1651",
number = "6",
volume = "96",
doi = "10.3382/ps/pew408",
url = "conv_797"
}

Shannon, T. A., Ledoux, D. R., Rottinghaus, G. E., Shaw, D. P., Daković, A.,& Marković, M.. (2017). The efficacy of raw and concentrated bentonite clay in reducing the toxic effects of aflatoxin in broiler chicks. in Poultry Science
Oxford Univ Press, Oxford., 96(6), 1651-1658.
https://doi.org/10.3382/ps/pew408
conv_797

Shannon TA, Ledoux DR, Rottinghaus GE, Shaw DP, Daković A, Marković M. The efficacy of raw and concentrated bentonite clay in reducing the toxic effects of aflatoxin in broiler chicks. in Poultry Science. 2017;96(6):1651-1658.
doi:10.3382/ps/pew408
conv_797 .

Shannon, T. A., Ledoux, David R., Rottinghaus, George E., Shaw, D. P., Daković, Aleksandra, Marković, Marija, "The efficacy of raw and concentrated bentonite clay in reducing the toxic effects of aflatoxin in broiler chicks" in Poultry Science, 96, no. 6 (2017):1651-1658,
https://doi.org/10.3382/ps/pew408 .,
conv_797 .

TY  - JOUR
AU  - Marković, Marija
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Kragović, Milan
AU  - Petković, Anđela
AU  - Krajišnik, Danina
AU  - Milić, Jela
AU  - Mercurio, Mariano
AU  - de Gennaro, Bruno
PY  - 2017
UR  - https://ritnms.itnms.ac.rs/handle/123456789/430
AB  - In this study, organozeolites were prepared by treatment of the natural zeolites (clinoptilolite and phillipsite) with cetylpyridinium chloride (CP) equivalent to 50 and 100% of their external cation exchange capacities (ECEC). Organoclinoptilolites (ZCPs) and organophillipsites (PCPs) were characterized by FTIR spectroscopy, thermal analysis, determination of the point of zero charge and zeta potential. Adsorption of zearalenone (ZEN) by ZCPs and PCPs at pH 3 and 7 was investigated. Results showed that adsorption of ZEN increases with increasing amounts of CP at the zeolitic surfaces for both ZCPs and PCPs but the adsorption mechanism was different. Adsorption of ZEN by ZCPs followed a linear type of isotherm at pH 3 and 7 while ZEN adsorption by PCPs showed non linear (Langmuir and Freundlich) type of isotherm at both pH values. Different interactions between the ZEN molecule (or ion) and ZCPs and PCPs occurred: partition (linear isotherms) and adsorption in addition to partition (non linear isotherms), respectively. For the highest level of organic phase at the zeolitic surfaces, the maximum adsorbed amount of ZEN was 5.73 mg/g for organoclinoptilolite and 6.86 mg/g for organophillipsite at pH 3. Slightly higher adsorption: 6.98 mg/g for organoclinoptilolite and 7.54 mg/g for organophillipsite was achieved at pH 7. The results confirmed that CP ions at both zeolitic surfaces are responsible for ZEN adsorption and that organophillipsites are as effective in ZEN adsorption as organoclinoptilolites.
PB  - Elsevier, Amsterdam
T2  - Colloids and Surfaces B-Biointerfaces
T1  - Adsorption of the mycotoxin zearalenone by clinoptilolite and phillipsite zeolites treated with cetylpyridinium surfactant
EP  - 332
SP  - 324
VL  - 151
DO  - 10.1016/j.colsurfb.2016.12.033
UR  - conv_788
ER  - 

@article{
author = "Marković, Marija and Daković, Aleksandra and Rottinghaus, George E. and Kragović, Milan and Petković, Anđela and Krajišnik, Danina and Milić, Jela and Mercurio, Mariano and de Gennaro, Bruno",
year = "2017",
abstract = "In this study, organozeolites were prepared by treatment of the natural zeolites (clinoptilolite and phillipsite) with cetylpyridinium chloride (CP) equivalent to 50 and 100% of their external cation exchange capacities (ECEC). Organoclinoptilolites (ZCPs) and organophillipsites (PCPs) were characterized by FTIR spectroscopy, thermal analysis, determination of the point of zero charge and zeta potential. Adsorption of zearalenone (ZEN) by ZCPs and PCPs at pH 3 and 7 was investigated. Results showed that adsorption of ZEN increases with increasing amounts of CP at the zeolitic surfaces for both ZCPs and PCPs but the adsorption mechanism was different. Adsorption of ZEN by ZCPs followed a linear type of isotherm at pH 3 and 7 while ZEN adsorption by PCPs showed non linear (Langmuir and Freundlich) type of isotherm at both pH values. Different interactions between the ZEN molecule (or ion) and ZCPs and PCPs occurred: partition (linear isotherms) and adsorption in addition to partition (non linear isotherms), respectively. For the highest level of organic phase at the zeolitic surfaces, the maximum adsorbed amount of ZEN was 5.73 mg/g for organoclinoptilolite and 6.86 mg/g for organophillipsite at pH 3. Slightly higher adsorption: 6.98 mg/g for organoclinoptilolite and 7.54 mg/g for organophillipsite was achieved at pH 7. The results confirmed that CP ions at both zeolitic surfaces are responsible for ZEN adsorption and that organophillipsites are as effective in ZEN adsorption as organoclinoptilolites.",
publisher = "Elsevier, Amsterdam",
journal = "Colloids and Surfaces B-Biointerfaces",
title = "Adsorption of the mycotoxin zearalenone by clinoptilolite and phillipsite zeolites treated with cetylpyridinium surfactant",
pages = "332-324",
volume = "151",
doi = "10.1016/j.colsurfb.2016.12.033",
url = "conv_788"
}

Marković, M., Daković, A., Rottinghaus, G. E., Kragović, M., Petković, A., Krajišnik, D., Milić, J., Mercurio, M.,& de Gennaro, B.. (2017). Adsorption of the mycotoxin zearalenone by clinoptilolite and phillipsite zeolites treated with cetylpyridinium surfactant. in Colloids and Surfaces B-Biointerfaces
Elsevier, Amsterdam., 151, 324-332.
https://doi.org/10.1016/j.colsurfb.2016.12.033
conv_788

Marković M, Daković A, Rottinghaus GE, Kragović M, Petković A, Krajišnik D, Milić J, Mercurio M, de Gennaro B. Adsorption of the mycotoxin zearalenone by clinoptilolite and phillipsite zeolites treated with cetylpyridinium surfactant. in Colloids and Surfaces B-Biointerfaces. 2017;151:324-332.
doi:10.1016/j.colsurfb.2016.12.033
conv_788 .

Marković, Marija, Daković, Aleksandra, Rottinghaus, George E., Kragović, Milan, Petković, Anđela, Krajišnik, Danina, Milić, Jela, Mercurio, Mariano, de Gennaro, Bruno, "Adsorption of the mycotoxin zearalenone by clinoptilolite and phillipsite zeolites treated with cetylpyridinium surfactant" in Colloids and Surfaces B-Biointerfaces, 151 (2017):324-332,
https://doi.org/10.1016/j.colsurfb.2016.12.033 .,
conv_788 .

TY  - JOUR
AU  - Marković, Marija
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Stojanović, Mirjana
AU  - Dondur, Vera
AU  - Kragović, Milan
AU  - Gulišija, Zvonko
PY  - 2016
UR  - https://ritnms.itnms.ac.rs/handle/123456789/405
AB  - Aflatoxin B-1 adsorption by the concentrate of bentonite clay - montmorillonite and the natural zeolite -clinoptilolite and was investigated at the initial toxin concentration of 4 ppm, with different amounts of solid phase in suspension (1, 0.5, 0.2 and 0.1 g/L) and different pH values - 3, 7 and 9. Results indicated that for both minerals, decreasing the amount of solid phase in suspension, decrease the amount of active sites relevant for adsorption of aflatoxin B-1. Thus, for concentrate of montnorillonite, at the lowest level of solid phase in suspension (0.1 g/L), aflatoxin B-1 adsorption indexes were 97% at pH 3, 88% at pH 7 and 82% at pH 9, while for the natural zeolite, adsorption of toxin was 9% at pH 3 and 7% at pH 7 and 9. Since inorganic cations in minerals are mainly responsible for aflatoxin B-1 adsorption, even the natural zeolite - clinoptilite has much higher cation exchange capacity (the content of inorganic exchangeable cations) compared to the concentrate of montmorillonite, adsorption of aflatoxin B-1 by this mineral is much lower. Comparing the molecular dimensions of aflatoxin B-1 molecule with the dimension of channels of clinoptilolite and interlamellar space of montmorillonite it is obvious that this toxin is adsorbed only at the external surface of clinoptilolite while in the montmorillonite all active sites are equally available for its adsorption. Thus, the concentrate of montmorillonite possesses higher adsorption capacity for aflatoxin B-1. Results presented in this paper confirmed the fact that the differences in the structure of minerals led to their different efficiency for adsorption of aflatoxin B-1. Mineralogical and chemical composition, determination of cation exchange capacity, etc., are very important parameters influencing the effectiveness of minerals as aflatoxin B-1 adsorbents.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Aflatoxin b-1 adsorption by the natural aluminosilicates - concentrate of montmorillonite and zeolite
EP  - 524
IS  - 5
SP  - 519
VL  - 70
DO  - 10.2298/HEMIND150515058M
UR  - conv_778
ER  - 

@article{
author = "Marković, Marija and Daković, Aleksandra and Rottinghaus, George E. and Stojanović, Mirjana and Dondur, Vera and Kragović, Milan and Gulišija, Zvonko",
year = "2016",
abstract = "Aflatoxin B-1 adsorption by the concentrate of bentonite clay - montmorillonite and the natural zeolite -clinoptilolite and was investigated at the initial toxin concentration of 4 ppm, with different amounts of solid phase in suspension (1, 0.5, 0.2 and 0.1 g/L) and different pH values - 3, 7 and 9. Results indicated that for both minerals, decreasing the amount of solid phase in suspension, decrease the amount of active sites relevant for adsorption of aflatoxin B-1. Thus, for concentrate of montnorillonite, at the lowest level of solid phase in suspension (0.1 g/L), aflatoxin B-1 adsorption indexes were 97% at pH 3, 88% at pH 7 and 82% at pH 9, while for the natural zeolite, adsorption of toxin was 9% at pH 3 and 7% at pH 7 and 9. Since inorganic cations in minerals are mainly responsible for aflatoxin B-1 adsorption, even the natural zeolite - clinoptilite has much higher cation exchange capacity (the content of inorganic exchangeable cations) compared to the concentrate of montmorillonite, adsorption of aflatoxin B-1 by this mineral is much lower. Comparing the molecular dimensions of aflatoxin B-1 molecule with the dimension of channels of clinoptilolite and interlamellar space of montmorillonite it is obvious that this toxin is adsorbed only at the external surface of clinoptilolite while in the montmorillonite all active sites are equally available for its adsorption. Thus, the concentrate of montmorillonite possesses higher adsorption capacity for aflatoxin B-1. Results presented in this paper confirmed the fact that the differences in the structure of minerals led to their different efficiency for adsorption of aflatoxin B-1. Mineralogical and chemical composition, determination of cation exchange capacity, etc., are very important parameters influencing the effectiveness of minerals as aflatoxin B-1 adsorbents.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Aflatoxin b-1 adsorption by the natural aluminosilicates - concentrate of montmorillonite and zeolite",
pages = "524-519",
number = "5",
volume = "70",
doi = "10.2298/HEMIND150515058M",
url = "conv_778"
}

Marković, M., Daković, A., Rottinghaus, G. E., Stojanović, M., Dondur, V., Kragović, M.,& Gulišija, Z.. (2016). Aflatoxin b-1 adsorption by the natural aluminosilicates - concentrate of montmorillonite and zeolite. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 70(5), 519-524.
https://doi.org/10.2298/HEMIND150515058M
conv_778

Marković M, Daković A, Rottinghaus GE, Stojanović M, Dondur V, Kragović M, Gulišija Z. Aflatoxin b-1 adsorption by the natural aluminosilicates - concentrate of montmorillonite and zeolite. in Hemijska industrija. 2016;70(5):519-524.
doi:10.2298/HEMIND150515058M
conv_778 .

Marković, Marija, Daković, Aleksandra, Rottinghaus, George E., Stojanović, Mirjana, Dondur, Vera, Kragović, Milan, Gulišija, Zvonko, "Aflatoxin b-1 adsorption by the natural aluminosilicates - concentrate of montmorillonite and zeolite" in Hemijska industrija, 70, no. 5 (2016):519-524,
https://doi.org/10.2298/HEMIND150515058M .,
conv_778 .

TY  - CONF
AU  - Marković, Marija
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Kragović, Milan
AU  - Mercurio, Mariano
AU  - de Gennaro, Bruno
AU  - Damjanović, Ljiljana
PY  - 2015
UR  - https://ritnms.itnms.ac.rs/handle/123456789/698
AB  - Cetylpyridinum chloride (CP) was used to modify the surface of natural zeolites – clinoptilolite (Z) and phillipsite (P) and adsorption of zearalenone (ZEN) was investigated. Zeolites were modified with two different levels (5 and 10 mmol/100g) of CP and adsorption experiments were done at pH 3 and pH 7. Results showed that with increasing amounts of surfactant at the zeolitic surface, ZEN adsorption increased, as well as with increasing amounts of solid phase in the suspension. At the highest level of surfactant (10 mmol/100g), a slightly higher adsorption of ZEN was observed for phillipsite modified with CP ions, in contrast to clinoptilolite.
PB  - Croatian Zeolite Association
C3  - 6th Croatian-Slovenian-Serbian Symposium on Zeolites
T1  - Adsorption of zearalenone on surface modified zeolites – clinoptilolite and phillipsite
EP  - 84
SP  - 81
ER  - 

@conference{
author = "Marković, Marija and Daković, Aleksandra and Rottinghaus, George E. and Kragović, Milan and Mercurio, Mariano and de Gennaro, Bruno and Damjanović, Ljiljana",
year = "2015",
abstract = "Cetylpyridinum chloride (CP) was used to modify the surface of natural zeolites – clinoptilolite (Z) and phillipsite (P) and adsorption of zearalenone (ZEN) was investigated. Zeolites were modified with two different levels (5 and 10 mmol/100g) of CP and adsorption experiments were done at pH 3 and pH 7. Results showed that with increasing amounts of surfactant at the zeolitic surface, ZEN adsorption increased, as well as with increasing amounts of solid phase in the suspension. At the highest level of surfactant (10 mmol/100g), a slightly higher adsorption of ZEN was observed for phillipsite modified with CP ions, in contrast to clinoptilolite.",
publisher = "Croatian Zeolite Association",
journal = "6th Croatian-Slovenian-Serbian Symposium on Zeolites",
title = "Adsorption of zearalenone on surface modified zeolites – clinoptilolite and phillipsite",
pages = "84-81"
}

Marković, M., Daković, A., Rottinghaus, G. E., Kragović, M., Mercurio, M., de Gennaro, B.,& Damjanović, L.. (2015). Adsorption of zearalenone on surface modified zeolites – clinoptilolite and phillipsite. in 6th Croatian-Slovenian-Serbian Symposium on Zeolites
Croatian Zeolite Association., 81-84.

Marković M, Daković A, Rottinghaus GE, Kragović M, Mercurio M, de Gennaro B, Damjanović L. Adsorption of zearalenone on surface modified zeolites – clinoptilolite and phillipsite. in 6th Croatian-Slovenian-Serbian Symposium on Zeolites. 2015;:81-84..

Marković, Marija, Daković, Aleksandra, Rottinghaus, George E., Kragović, Milan, Mercurio, Mariano, de Gennaro, Bruno, Damjanović, Ljiljana, "Adsorption of zearalenone on surface modified zeolites – clinoptilolite and phillipsite" in 6th Croatian-Slovenian-Serbian Symposium on Zeolites (2015):81-84.

TY  - JOUR
AU  - Campagnollo, Femanda B.
AU  - Franco, Larissa T.
AU  - Rottinghaus, George E.
AU  - Kobashigawa, Estela
AU  - Ledoux, David R.
AU  - Daković, Aleksandra
AU  - Oliveira, Carlos A. F.
PY  - 2015
UR  - https://ritnms.itnms.ac.rs/handle/123456789/339
AB  - In vitro tests were performed to determine the ability of beer fermentation residue (BFR) containing Saccharomyces cerevisiae to bind aflatoxin B-1 (AFB(1)), zearalenone (ZEA), ochratoxin A (OTA) and deoxynivalenol (DON). BFR was obtained from a microbrewery, dried and ground, resulting in approximately 1.0 x 10(10) S. cerevisiae cells g(-1) BFR. Binding assays consisted of suspending BFR (100 mg) in 10 mL of buffer solution (pH 3.0 or 6.5) spiked with AFB(1), ZEA, OTA or DON (2.0 mu g ml(-1) of each mycotoxin), incubation (60 min, 25 degrees C) followed by centrifugation. The supernatants were analyzed by high performance liquid chromatography. BFR had higher binding capacity for ZEA (75.1% and 77.5% at pH 3.0 and 6.5, respectively), when compared with AFB(1), OTA and DON (less than 60% and 40% at pH 3.0 and 6.5, respectively). BFR also produced linear isotherms for ZEA at both pH values, hence indicating a potential application of industrial fermentation by-products containing yeast cells in reducing the bioavailability of ZEA in contaminated feedstuffs. However, in vivo studies are required to prove its efficacy in livestock and poultry.
PB  - Elsevier, Amsterdam
T2  - Food Research International
T1  - In vitro evaluation of the ability of beer fermentation residue containing Saccharomyces cerevisiae to bind mycotoxins
EP  - 648
SP  - 643
VL  - 77
DO  - 10.1016/j.foodres.2015.08.032
UR  - conv_748
ER  - 

@article{
author = "Campagnollo, Femanda B. and Franco, Larissa T. and Rottinghaus, George E. and Kobashigawa, Estela and Ledoux, David R. and Daković, Aleksandra and Oliveira, Carlos A. F.",
year = "2015",
abstract = "In vitro tests were performed to determine the ability of beer fermentation residue (BFR) containing Saccharomyces cerevisiae to bind aflatoxin B-1 (AFB(1)), zearalenone (ZEA), ochratoxin A (OTA) and deoxynivalenol (DON). BFR was obtained from a microbrewery, dried and ground, resulting in approximately 1.0 x 10(10) S. cerevisiae cells g(-1) BFR. Binding assays consisted of suspending BFR (100 mg) in 10 mL of buffer solution (pH 3.0 or 6.5) spiked with AFB(1), ZEA, OTA or DON (2.0 mu g ml(-1) of each mycotoxin), incubation (60 min, 25 degrees C) followed by centrifugation. The supernatants were analyzed by high performance liquid chromatography. BFR had higher binding capacity for ZEA (75.1% and 77.5% at pH 3.0 and 6.5, respectively), when compared with AFB(1), OTA and DON (less than 60% and 40% at pH 3.0 and 6.5, respectively). BFR also produced linear isotherms for ZEA at both pH values, hence indicating a potential application of industrial fermentation by-products containing yeast cells in reducing the bioavailability of ZEA in contaminated feedstuffs. However, in vivo studies are required to prove its efficacy in livestock and poultry.",
publisher = "Elsevier, Amsterdam",
journal = "Food Research International",
title = "In vitro evaluation of the ability of beer fermentation residue containing Saccharomyces cerevisiae to bind mycotoxins",
pages = "648-643",
volume = "77",
doi = "10.1016/j.foodres.2015.08.032",
url = "conv_748"
}

Campagnollo, F. B., Franco, L. T., Rottinghaus, G. E., Kobashigawa, E., Ledoux, D. R., Daković, A.,& Oliveira, C. A. F.. (2015). In vitro evaluation of the ability of beer fermentation residue containing Saccharomyces cerevisiae to bind mycotoxins. in Food Research International
Elsevier, Amsterdam., 77, 643-648.
https://doi.org/10.1016/j.foodres.2015.08.032
conv_748

Campagnollo FB, Franco LT, Rottinghaus GE, Kobashigawa E, Ledoux DR, Daković A, Oliveira CAF. In vitro evaluation of the ability of beer fermentation residue containing Saccharomyces cerevisiae to bind mycotoxins. in Food Research International. 2015;77:643-648.
doi:10.1016/j.foodres.2015.08.032
conv_748 .

Campagnollo, Femanda B., Franco, Larissa T., Rottinghaus, George E., Kobashigawa, Estela, Ledoux, David R., Daković, Aleksandra, Oliveira, Carlos A. F., "In vitro evaluation of the ability of beer fermentation residue containing Saccharomyces cerevisiae to bind mycotoxins" in Food Research International, 77 (2015):643-648,
https://doi.org/10.1016/j.foodres.2015.08.032 .,
conv_748 .

TY  - CHAP
AU  - Milić, Jela
AU  - Daković, Aleksandra
AU  - Krajišnik, Danina
AU  - Rottinghaus, George E.
PY  - 2014
UR  - https://ritnms.itnms.ac.rs/handle/123456789/288
AB  - Natural and synthetic zeolites have emerged as potential materials for biomedical application in recent years. Zeolites are hydrated microporous tektoaluminosilicates consisting of three-dimensional frameworks of SiO4 and AlO4 tetrahedra linked through shared oxygen atoms. Clinoptilolite, a mineral from the heulandite group of zeolites, ((Na,K)6(Al6Si3O)O72·nH2O), is the most abundant sedimentary zeolite in nature. In this chapter an overview of surface modifi cation of clinoptilolite by interaction with cationic surfactants is given alongside with the methods used for characterization of the surfactant modifi ed zeolites (organozeolites/composites). Diff erent organozeolites were tested under conditions for adsorption of several mycotoxins commonly found in animal feed. Study of in vitro surfactant desorption in vitro followed by in vivo acute toxicity testing was used to demonstrate the nontoxic nature of these improved mineral materials. Functionality related characteristics of modifi ed natural zeolites were analyzed for investigation of their potential use as pharmaceutical excipients for modifi ed release of active pharmaceutical ingredients.
PB  - Wiley Blackwell
T2  - Advanced Healthcare Materials
T1  - Modified Natural Zeolites-Functional Characterization and Biomedical Application
EP  - 403
SP  - 359
VL  - 9781118773598
DO  - 10.1002/9781118774205.ch10
UR  - conv_1041
ER  - 

@inbook{
author = "Milić, Jela and Daković, Aleksandra and Krajišnik, Danina and Rottinghaus, George E.",
year = "2014",
abstract = "Natural and synthetic zeolites have emerged as potential materials for biomedical application in recent years. Zeolites are hydrated microporous tektoaluminosilicates consisting of three-dimensional frameworks of SiO4 and AlO4 tetrahedra linked through shared oxygen atoms. Clinoptilolite, a mineral from the heulandite group of zeolites, ((Na,K)6(Al6Si3O)O72·nH2O), is the most abundant sedimentary zeolite in nature. In this chapter an overview of surface modifi cation of clinoptilolite by interaction with cationic surfactants is given alongside with the methods used for characterization of the surfactant modifi ed zeolites (organozeolites/composites). Diff erent organozeolites were tested under conditions for adsorption of several mycotoxins commonly found in animal feed. Study of in vitro surfactant desorption in vitro followed by in vivo acute toxicity testing was used to demonstrate the nontoxic nature of these improved mineral materials. Functionality related characteristics of modifi ed natural zeolites were analyzed for investigation of their potential use as pharmaceutical excipients for modifi ed release of active pharmaceutical ingredients.",
publisher = "Wiley Blackwell",
journal = "Advanced Healthcare Materials",
booktitle = "Modified Natural Zeolites-Functional Characterization and Biomedical Application",
pages = "403-359",
volume = "9781118773598",
doi = "10.1002/9781118774205.ch10",
url = "conv_1041"
}

Milić, J., Daković, A., Krajišnik, D.,& Rottinghaus, G. E.. (2014). Modified Natural Zeolites-Functional Characterization and Biomedical Application. in Advanced Healthcare Materials
Wiley Blackwell., 9781118773598, 359-403.
https://doi.org/10.1002/9781118774205.ch10
conv_1041

Milić J, Daković A, Krajišnik D, Rottinghaus GE. Modified Natural Zeolites-Functional Characterization and Biomedical Application. in Advanced Healthcare Materials. 2014;9781118773598:359-403.
doi:10.1002/9781118774205.ch10
conv_1041 .

Milić, Jela, Daković, Aleksandra, Krajišnik, Danina, Rottinghaus, George E., "Modified Natural Zeolites-Functional Characterization and Biomedical Application" in Advanced Healthcare Materials, 9781118773598 (2014):359-403,
https://doi.org/10.1002/9781118774205.ch10 .,
conv_1041 .

TY  - JOUR
AU  - Neeff, D. V.
AU  - Ledoux, David R.
AU  - Rottinghaus, George E.
AU  - Bermudez, A. J.
AU  - Daković, Aleksandra
AU  - Murarolli, R. A.
AU  - Oliveira, Carlos A. F.
PY  - 2013
UR  - https://ritnms.itnms.ac.rs/handle/123456789/251
AB  - The aim of this study was to determine the binding capacity of a hydrated sodium calcium aluminosilicate (HSCAS) for aflatoxin B-1 (AFB(1)), and the efficacy of the HSCAS to reduce the concentrations of residual AFB(1) and its metabolites in the liver and kidney of broilers fed AFB(1). One hundred 1-d-old male broilers (Ross 708) were maintained in chick batteries and allowed ad libitum access to feed and water. A completely randomized design was used with 5 replicate pens of 5 chicks assigned to each of 4 dietary treatments from hatch to 21 d. Dietary treatments included the following: A) basal diet (BD), with no HSCAS or AFB(1), B) BD supplemented with 0.5% HSCAS only, C) BD supplemented with 2.5 mg of AFB(1)/kg of feed, and D) BD supplemented with 2.5 mg of AFB(1)/kg of feed and 0.5% HSCAS. On d 21, 5 chicks from each treatment were anesthetized with carbon dioxide, killed by cervical dislocation, and samples of liver and kidney were collected for analysis of AFB(1) residues. The percentage of AFB(1) bound for each concentration of adsorbent (100, 10, 1, 0.5, 0.25, and 0.05 mg/10 mL) was 100, 91.1, 81.8, 75.4, 40.1, and 8.8%, respectively. Concentrations of aflatoxin residues (AFB(1), aflatoxicol, aflatoxins B-2 and G(1)) were lower (P  LT  0.05) in livers and kidneys of birds fed AFB(1) plus HSCAS (diet D), when compared with birds fed AFB(1) alone (diet C). However, histopathology data from the in vivo study indicated that HSCAS did not prevent lesions associated with aflatoxicosis. The decrease in the bioavailability of AFB(1) caused by the HSCAS reduced aflatoxin residues in liver and kidney, but not enough to completely prevent the toxic effects of AFB(1) in broilers.
PB  - Oxford Univ Press, Oxford
T2  - Poultry Science
T1  - In vitro and in vivo efficacy of a hydrated sodium calcium aluminosilicate to bind and reduce aflatoxin residues in tissues of broiler chicks fed aflatoxin B-1
EP  - 137
IS  - 1
SP  - 131
VL  - 92
DO  - 10.3382/ps.2012-02510
UR  - conv_642
ER  - 

@article{
author = "Neeff, D. V. and Ledoux, David R. and Rottinghaus, George E. and Bermudez, A. J. and Daković, Aleksandra and Murarolli, R. A. and Oliveira, Carlos A. F.",
year = "2013",
abstract = "The aim of this study was to determine the binding capacity of a hydrated sodium calcium aluminosilicate (HSCAS) for aflatoxin B-1 (AFB(1)), and the efficacy of the HSCAS to reduce the concentrations of residual AFB(1) and its metabolites in the liver and kidney of broilers fed AFB(1). One hundred 1-d-old male broilers (Ross 708) were maintained in chick batteries and allowed ad libitum access to feed and water. A completely randomized design was used with 5 replicate pens of 5 chicks assigned to each of 4 dietary treatments from hatch to 21 d. Dietary treatments included the following: A) basal diet (BD), with no HSCAS or AFB(1), B) BD supplemented with 0.5% HSCAS only, C) BD supplemented with 2.5 mg of AFB(1)/kg of feed, and D) BD supplemented with 2.5 mg of AFB(1)/kg of feed and 0.5% HSCAS. On d 21, 5 chicks from each treatment were anesthetized with carbon dioxide, killed by cervical dislocation, and samples of liver and kidney were collected for analysis of AFB(1) residues. The percentage of AFB(1) bound for each concentration of adsorbent (100, 10, 1, 0.5, 0.25, and 0.05 mg/10 mL) was 100, 91.1, 81.8, 75.4, 40.1, and 8.8%, respectively. Concentrations of aflatoxin residues (AFB(1), aflatoxicol, aflatoxins B-2 and G(1)) were lower (P  LT  0.05) in livers and kidneys of birds fed AFB(1) plus HSCAS (diet D), when compared with birds fed AFB(1) alone (diet C). However, histopathology data from the in vivo study indicated that HSCAS did not prevent lesions associated with aflatoxicosis. The decrease in the bioavailability of AFB(1) caused by the HSCAS reduced aflatoxin residues in liver and kidney, but not enough to completely prevent the toxic effects of AFB(1) in broilers.",
publisher = "Oxford Univ Press, Oxford",
journal = "Poultry Science",
title = "In vitro and in vivo efficacy of a hydrated sodium calcium aluminosilicate to bind and reduce aflatoxin residues in tissues of broiler chicks fed aflatoxin B-1",
pages = "137-131",
number = "1",
volume = "92",
doi = "10.3382/ps.2012-02510",
url = "conv_642"
}

Neeff, D. V., Ledoux, D. R., Rottinghaus, G. E., Bermudez, A. J., Daković, A., Murarolli, R. A.,& Oliveira, C. A. F.. (2013). In vitro and in vivo efficacy of a hydrated sodium calcium aluminosilicate to bind and reduce aflatoxin residues in tissues of broiler chicks fed aflatoxin B-1. in Poultry Science
Oxford Univ Press, Oxford., 92(1), 131-137.
https://doi.org/10.3382/ps.2012-02510
conv_642

Neeff DV, Ledoux DR, Rottinghaus GE, Bermudez AJ, Daković A, Murarolli RA, Oliveira CAF. In vitro and in vivo efficacy of a hydrated sodium calcium aluminosilicate to bind and reduce aflatoxin residues in tissues of broiler chicks fed aflatoxin B-1. in Poultry Science. 2013;92(1):131-137.
doi:10.3382/ps.2012-02510
conv_642 .

Neeff, D. V., Ledoux, David R., Rottinghaus, George E., Bermudez, A. J., Daković, Aleksandra, Murarolli, R. A., Oliveira, Carlos A. F., "In vitro and in vivo efficacy of a hydrated sodium calcium aluminosilicate to bind and reduce aflatoxin residues in tissues of broiler chicks fed aflatoxin B-1" in Poultry Science, 92, no. 1 (2013):131-137,
https://doi.org/10.3382/ps.2012-02510 .,
conv_642 .

TY  - JOUR
AU  - Daković, Aleksandra
AU  - Kragović, Milan
AU  - Rottinghaus, George E.
AU  - Ledoux, David R.
AU  - Butkeraitis, Paula
AU  - Vojislavljević, Dubravka Z.
AU  - Zarić, Snežana
AU  - Stamenić, Ljubišav
PY  - 2012
UR  - https://ritnms.itnms.ac.rs/handle/123456789/215
AB  - A zinc-exchanged montmorillonite (Zn-MONT) was prepared from a natural montmorillonite (MONT) and the adsorption of aflatoxin B-1 (AFB(1)) was investigated at pH 3 and 7. Characterization of Zn-MONT was done by determination of chemical composition, the point of the zero charge (pH(pzc)), thermal (DTA/TGA/DTG) and X-ray powder diffraction (XRPD) analysis. Adsorption of AFB(1) (C-0 = 4 ppm) by Zn-MONT, at different solid/liquid ratios (10, 1 and 0.5 g L-1), at pH 3 or 7, showed that its adsorption was high (over 96%) and independent of pH, similar to MONT. No desorption of AFB(1) from MONT-AFB(1) and Zn-MONT-AFB(1) complexes occurred at pH 6.5, suggesting strong binding of AFB(1) by both adsorbents. Furthermore, AFB(1) adsorption by Zn-MONT followed a nonlinear (Langmuir) type of isotherm at pH 3 with a calculated maximum capacity of 60.17 mg g(-1). The stability of MONT-AFB(1) and Zn-MONT-AFB(1) complexes was evaluated by calculating the binding energies between AFB(1) and metal cations using quantum chemical methods. The evaluated interaction energies of AFB(1) with hydrated Zn2+, Mg2+, and Ca2+ cations showed that the strongest interaction was the interaction of the Zn2+ system, -70.2 kcal mol(-1), whereas energies for Mg-2 and Ca2+ systems were -68.8 and -62.9 kcal mol(-1), respectively. The results indicate that Zn-MONT can be suitable for potential practical application as both, an antibacterial and an aflatoxin binding agent.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Chemistry and Physics
T1  - Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent
EP  - 220
IS  - 1
SP  - 213
VL  - 137
DO  - 10.1016/j.matchemphys.2012.09.010
UR  - conv_640
ER  - 

@article{
author = "Daković, Aleksandra and Kragović, Milan and Rottinghaus, George E. and Ledoux, David R. and Butkeraitis, Paula and Vojislavljević, Dubravka Z. and Zarić, Snežana and Stamenić, Ljubišav",
year = "2012",
abstract = "A zinc-exchanged montmorillonite (Zn-MONT) was prepared from a natural montmorillonite (MONT) and the adsorption of aflatoxin B-1 (AFB(1)) was investigated at pH 3 and 7. Characterization of Zn-MONT was done by determination of chemical composition, the point of the zero charge (pH(pzc)), thermal (DTA/TGA/DTG) and X-ray powder diffraction (XRPD) analysis. Adsorption of AFB(1) (C-0 = 4 ppm) by Zn-MONT, at different solid/liquid ratios (10, 1 and 0.5 g L-1), at pH 3 or 7, showed that its adsorption was high (over 96%) and independent of pH, similar to MONT. No desorption of AFB(1) from MONT-AFB(1) and Zn-MONT-AFB(1) complexes occurred at pH 6.5, suggesting strong binding of AFB(1) by both adsorbents. Furthermore, AFB(1) adsorption by Zn-MONT followed a nonlinear (Langmuir) type of isotherm at pH 3 with a calculated maximum capacity of 60.17 mg g(-1). The stability of MONT-AFB(1) and Zn-MONT-AFB(1) complexes was evaluated by calculating the binding energies between AFB(1) and metal cations using quantum chemical methods. The evaluated interaction energies of AFB(1) with hydrated Zn2+, Mg2+, and Ca2+ cations showed that the strongest interaction was the interaction of the Zn2+ system, -70.2 kcal mol(-1), whereas energies for Mg-2 and Ca2+ systems were -68.8 and -62.9 kcal mol(-1), respectively. The results indicate that Zn-MONT can be suitable for potential practical application as both, an antibacterial and an aflatoxin binding agent.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Chemistry and Physics",
title = "Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent",
pages = "220-213",
number = "1",
volume = "137",
doi = "10.1016/j.matchemphys.2012.09.010",
url = "conv_640"
}

Daković, A., Kragović, M., Rottinghaus, G. E., Ledoux, D. R., Butkeraitis, P., Vojislavljević, D. Z., Zarić, S.,& Stamenić, L.. (2012). Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent. in Materials Chemistry and Physics
Elsevier Science Sa, Lausanne., 137(1), 213-220.
https://doi.org/10.1016/j.matchemphys.2012.09.010
conv_640

Daković A, Kragović M, Rottinghaus GE, Ledoux DR, Butkeraitis P, Vojislavljević DZ, Zarić S, Stamenić L. Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent. in Materials Chemistry and Physics. 2012;137(1):213-220.
doi:10.1016/j.matchemphys.2012.09.010
conv_640 .

Daković, Aleksandra, Kragović, Milan, Rottinghaus, George E., Ledoux, David R., Butkeraitis, Paula, Vojislavljević, Dubravka Z., Zarić, Snežana, Stamenić, Ljubišav, "Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent" in Materials Chemistry and Physics, 137, no. 1 (2012):213-220,
https://doi.org/10.1016/j.matchemphys.2012.09.010 .,
conv_640 .

TY  - JOUR
AU  - Daković, Aleksandra
AU  - Kragović, Milan
AU  - Rottinghaus, George E.
AU  - Sekulić, Živko
AU  - Milićević, Sonja
AU  - Milonjić, Slobodan K.
AU  - Zarić, Snežana
PY  - 2010
UR  - https://ritnms.itnms.ac.rs/handle/123456789/177
AB  - Natural Zeolitic tuff was modified with 2, 5 and 10 mmol M+/100 g of octadecyldimethylbenzyl ammonium (ODMBA) ions and the products were denoted as OZ-2, OZ-5 and OZ-10. The starting material and organozeolites were characterized by determination of the point of zero charge (pH(pzc)) and by thermal analysis. in vitro sorption of fumonisin B-1 (FB1) was studied for all sorbents at pH 3, 7 and 9. The pH(pzc) for the zeolitic tuff was 6.8 +/- 0.1, while the pH(pzc) for OZ-2, OZ-5 and OZ-10 pH(pzc) was 7.0 +/- 0.1. The curves pH(final) = f(pH(initial)) suggest that the surfaces of all sorbents are positively charged at pH 3 and uncharged at pH 7 and 9. High sorption of FB1 by the zeolitic tuff in acidic solution Suggests electrostatic Interactions between the anionic FB1 and the positively charged surface. At pH 7 and 9, adsorption of FB1 is prevented because anionic FB1 cannot be adsorbed at the uncharged surface. From the pH(pzc) for the organozeolites, it is possible that with lower amounts of ODMBA (OZ-2 and OZ-5), at pH 3, beside interactions between head groups of ODMBA and its alkyl chains and anionic FB1, electrostatic interactions between positive uncovered surface and anionic FB1 contribute to the sorption, while at pH 7 and 9 there is only the possibility for interactions between FB1 and ODMBA. When the zeolitic surface was completely covered with ODMBA (OZ-10), FB1 sorption was independent of the form of FB1 suggesting only interactions between ODMBA and FB1.
PB  - Elsevier, Amsterdam
T2  - Colloids and Surfaces B-Biointerfaces
T1  - Influence of natural zeolitic tuff and organozeolites surface charge on sorption of ionizable fumonisin B-1
EP  - 278
IS  - 1
SP  - 272
VL  - 76
DO  - 10.1016/j.colsurfb.2009.11.003
UR  - conv_577
ER  - 

@article{
author = "Daković, Aleksandra and Kragović, Milan and Rottinghaus, George E. and Sekulić, Živko and Milićević, Sonja and Milonjić, Slobodan K. and Zarić, Snežana",
year = "2010",
abstract = "Natural Zeolitic tuff was modified with 2, 5 and 10 mmol M+/100 g of octadecyldimethylbenzyl ammonium (ODMBA) ions and the products were denoted as OZ-2, OZ-5 and OZ-10. The starting material and organozeolites were characterized by determination of the point of zero charge (pH(pzc)) and by thermal analysis. in vitro sorption of fumonisin B-1 (FB1) was studied for all sorbents at pH 3, 7 and 9. The pH(pzc) for the zeolitic tuff was 6.8 +/- 0.1, while the pH(pzc) for OZ-2, OZ-5 and OZ-10 pH(pzc) was 7.0 +/- 0.1. The curves pH(final) = f(pH(initial)) suggest that the surfaces of all sorbents are positively charged at pH 3 and uncharged at pH 7 and 9. High sorption of FB1 by the zeolitic tuff in acidic solution Suggests electrostatic Interactions between the anionic FB1 and the positively charged surface. At pH 7 and 9, adsorption of FB1 is prevented because anionic FB1 cannot be adsorbed at the uncharged surface. From the pH(pzc) for the organozeolites, it is possible that with lower amounts of ODMBA (OZ-2 and OZ-5), at pH 3, beside interactions between head groups of ODMBA and its alkyl chains and anionic FB1, electrostatic interactions between positive uncovered surface and anionic FB1 contribute to the sorption, while at pH 7 and 9 there is only the possibility for interactions between FB1 and ODMBA. When the zeolitic surface was completely covered with ODMBA (OZ-10), FB1 sorption was independent of the form of FB1 suggesting only interactions between ODMBA and FB1.",
publisher = "Elsevier, Amsterdam",
journal = "Colloids and Surfaces B-Biointerfaces",
title = "Influence of natural zeolitic tuff and organozeolites surface charge on sorption of ionizable fumonisin B-1",
pages = "278-272",
number = "1",
volume = "76",
doi = "10.1016/j.colsurfb.2009.11.003",
url = "conv_577"
}

Daković, A., Kragović, M., Rottinghaus, G. E., Sekulić, Ž., Milićević, S., Milonjić, S. K.,& Zarić, S.. (2010). Influence of natural zeolitic tuff and organozeolites surface charge on sorption of ionizable fumonisin B-1. in Colloids and Surfaces B-Biointerfaces
Elsevier, Amsterdam., 76(1), 272-278.
https://doi.org/10.1016/j.colsurfb.2009.11.003
conv_577

Daković A, Kragović M, Rottinghaus GE, Sekulić Ž, Milićević S, Milonjić SK, Zarić S. Influence of natural zeolitic tuff and organozeolites surface charge on sorption of ionizable fumonisin B-1. in Colloids and Surfaces B-Biointerfaces. 2010;76(1):272-278.
doi:10.1016/j.colsurfb.2009.11.003
conv_577 .

Daković, Aleksandra, Kragović, Milan, Rottinghaus, George E., Sekulić, Živko, Milićević, Sonja, Milonjić, Slobodan K., Zarić, Snežana, "Influence of natural zeolitic tuff and organozeolites surface charge on sorption of ionizable fumonisin B-1" in Colloids and Surfaces B-Biointerfaces, 76, no. 1 (2010):272-278,
https://doi.org/10.1016/j.colsurfb.2009.11.003 .,
conv_577 .

TY  - JOUR
AU  - Daković, Aleksandra
AU  - Sekulić, Živko
AU  - Rottinghaus, George E.
AU  - Stojanović, Ana
AU  - Milićević, Sonja
AU  - Kragović, Milan
PY  - 2009
UR  - https://ritnms.itnms.ac.rs/handle/123456789/159
AB  - U ovom radu su prikazani rezultati ispitivanja adsorpcije T-2 toksina na mineralu iz grupe smektita-hektoritu, na različitim pH vrednostima (3,0; 7,0 i 9,0). Ispitivanja su pokazala da adsorbovana količina T-2 toksina na hektoritu opada sa porastom sadržaja čvrste faze u suspenziji na svim ispitivanim pH vrednostima. Sa adsorpcionih izotermi se primećuje da sa povećanjem početne koncentracije T-2 toksina raste i adsorpcija T-2 toksina, na svim ispitivanim pH vrednostima. Adsorpcija T-2 toksina na hektoritu se može opisati nelinearanim (Lengmir, Langmuir) tipom izoterme na pH 3,0; 7,0 i 9,0, pri čemu faktor korelacije (r2) iznosi 0,943 na pH 3,0; 0,919 na pH 7,0 i 0,939 na pH 9,0. Maksimalna adsorbovana količina T-2 toksina na hektoritu na osnovu Lengmirove izoterme (9,178 mg g-1 na pH 3,0; 9,930 mg g-1 na pH 7,0 i 19,341 mg g-1 na pH 9,0), ukazuje da je adsorpcija T-2 toksina na hektoritu zavisna od pH. Dobijeni rezultati ukazuju na postojanje specifičnih aktivnih centara na hektoritu na kojima se T-2 toksin adorbuje.
AB  - The adsorption of T-2 toxin by the natural smectite mineral-hectorite at pH 3.0, 7.0 and 9.0 was investigated. The results of T-2 toxin adsorption on hectorite showed that the T-2 adsorption capacity decreased with increasing concentration of adsorbent in the suspension for all the investigated pH values. From the adsorption isotherms, an increase in T-2 toxin adsorption with increasing initial T-2 toxin concentration was observed for all the investigated pH values. The T-2 toxin adsorption by hectorite followed a non-linear (Langmuir) type of isotherm at pH 3.0, 7.0 and 9.0, with correlation coefficients (r2) of 0.943 at pH 3.0, 0.919 at pH 7.0 and 0.939 at pH 9.0. The estimated maximum T-2 toxin adsorption by hectorite based on the Langmuir fit to the data (9.178 mg/g at pH 3.0, 9.930 mg/g at pH 7.0, and 19.341 mg/g at pH 9.0), indicated that the adsorption of T-2 toxin by hectorite is pH dependent. The obtained data suggest the existence of specific active sites in hectorite onto which the T-2 toxin is adsorbed.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Adsorpcija T-2 toksina na hektoritu
T1  - T-2 toxin adsorption by hectorite
EP  - 1292
IS  - 11
SP  - 1283
VL  - 74
DO  - 10.2298/JSC0911283D
UR  - conv_571
ER  - 

@article{
author = "Daković, Aleksandra and Sekulić, Živko and Rottinghaus, George E. and Stojanović, Ana and Milićević, Sonja and Kragović, Milan",
year = "2009",
abstract = "U ovom radu su prikazani rezultati ispitivanja adsorpcije T-2 toksina na mineralu iz grupe smektita-hektoritu, na različitim pH vrednostima (3,0; 7,0 i 9,0). Ispitivanja su pokazala da adsorbovana količina T-2 toksina na hektoritu opada sa porastom sadržaja čvrste faze u suspenziji na svim ispitivanim pH vrednostima. Sa adsorpcionih izotermi se primećuje da sa povećanjem početne koncentracije T-2 toksina raste i adsorpcija T-2 toksina, na svim ispitivanim pH vrednostima. Adsorpcija T-2 toksina na hektoritu se može opisati nelinearanim (Lengmir, Langmuir) tipom izoterme na pH 3,0; 7,0 i 9,0, pri čemu faktor korelacije (r2) iznosi 0,943 na pH 3,0; 0,919 na pH 7,0 i 0,939 na pH 9,0. Maksimalna adsorbovana količina T-2 toksina na hektoritu na osnovu Lengmirove izoterme (9,178 mg g-1 na pH 3,0; 9,930 mg g-1 na pH 7,0 i 19,341 mg g-1 na pH 9,0), ukazuje da je adsorpcija T-2 toksina na hektoritu zavisna od pH. Dobijeni rezultati ukazuju na postojanje specifičnih aktivnih centara na hektoritu na kojima se T-2 toksin adorbuje., The adsorption of T-2 toxin by the natural smectite mineral-hectorite at pH 3.0, 7.0 and 9.0 was investigated. The results of T-2 toxin adsorption on hectorite showed that the T-2 adsorption capacity decreased with increasing concentration of adsorbent in the suspension for all the investigated pH values. From the adsorption isotherms, an increase in T-2 toxin adsorption with increasing initial T-2 toxin concentration was observed for all the investigated pH values. The T-2 toxin adsorption by hectorite followed a non-linear (Langmuir) type of isotherm at pH 3.0, 7.0 and 9.0, with correlation coefficients (r2) of 0.943 at pH 3.0, 0.919 at pH 7.0 and 0.939 at pH 9.0. The estimated maximum T-2 toxin adsorption by hectorite based on the Langmuir fit to the data (9.178 mg/g at pH 3.0, 9.930 mg/g at pH 7.0, and 19.341 mg/g at pH 9.0), indicated that the adsorption of T-2 toxin by hectorite is pH dependent. The obtained data suggest the existence of specific active sites in hectorite onto which the T-2 toxin is adsorbed.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Adsorpcija T-2 toksina na hektoritu, T-2 toxin adsorption by hectorite",
pages = "1292-1283",
number = "11",
volume = "74",
doi = "10.2298/JSC0911283D",
url = "conv_571"
}

Daković, A., Sekulić, Ž., Rottinghaus, G. E., Stojanović, A., Milićević, S.,& Kragović, M.. (2009). Adsorpcija T-2 toksina na hektoritu. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 74(11), 1283-1292.
https://doi.org/10.2298/JSC0911283D
conv_571

Daković A, Sekulić Ž, Rottinghaus GE, Stojanović A, Milićević S, Kragović M. Adsorpcija T-2 toksina na hektoritu. in Journal of the Serbian Chemical Society. 2009;74(11):1283-1292.
doi:10.2298/JSC0911283D
conv_571 .

Daković, Aleksandra, Sekulić, Živko, Rottinghaus, George E., Stojanović, Ana, Milićević, Sonja, Kragović, Milan, "Adsorpcija T-2 toksina na hektoritu" in Journal of the Serbian Chemical Society, 74, no. 11 (2009):1283-1292,
https://doi.org/10.2298/JSC0911283D .,
conv_571 .

TY  - JOUR
AU  - Sekulić, Živko
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Milićević, Sonja
AU  - Stojanović, Jovica
AU  - Stanić, Tanja
PY  - 2009
UR  - https://ritnms.itnms.ac.rs/handle/123456789/169
AB  - U ovom radu su dati rezultati ispitivanja mogućnosti dobijanja materijala za adsorpciju aflatoksina B1 modifikacijom minerala montmorilonita jonima bakra. Ispitivanja su rađena na bentonitskoj glini koja se eksploatiše u ležištu Sokolac kod Šipova u Republici Srpskoj. Rezultati pokazuju da stepen jonske izmene neorganskih katjona u montmorilonitu jonima bakra raste sa porastom polazne količine bakra u rastvoru. Za ispitivanja adsorpcije aflatoksina B1 na montmorilonitu modifikovanom jonima bakra je odabran proizvod sa sadržajem bakra 2.65%. Određeno je da montmorilonit, kao i montmorilonit modifikovan jonima bakra efikasno adsorbuju aflatoksin B1, pri različitim sadržajima čvrste faze u suspenziji, kao i na različitim pH. Pri sadržaju čvrste faze u supenziji 10 g/l, indeks adsorpcije aflatoksina B1 na montmorilonitu iznosi 100% na pH 3, 98% na pH 7 i 96% na pH 9. Na montmorilonitu modifikovanom jonima bakra, pri istom količini čvrste faze u suspenziji, dobijene su sledeće vrednosti indeksa adsorpcije aflatoksina B1: 98% na pH 3, 98% na pH 7 i 96% na pH 9. Sa smanjenjem količine čvrste faze u suspenziji (0.5 g/l), ne dolazi do smanjenja indeksa adsorpcije ovog toksina na oba adsorbenta. To znači da, jonska izmena neorganskih katjona u koncentratu montmorilonita sa jonima bakra nije dovela do smanjenja indeksa adsorpcije aflatoksina B1, kako na pH 3, tako i na pH 7 i 9. Zapaženo je i da adsorpcija aflatoksina B1 na oba adsorbenta ne zavisi od pH sredine.
AB  - In this paper, the results of possibility for preparation of material for aflatoxin B1 adsorption, based on modification of montmorillonite with copper ions, re presented. The bentonite clay from Sokolac deposit (Šipovo, Bosnia) was used as the starting raw material. It was determined that ion exchange degree of inorganic cations in montmorillonite with copper ions increase with increasing the initial copper concentration in solution. The copper modified montmorillonite with 2.65% of copper was selected for aflatoxin B1 adsorption experiments. It was shown that montmorillonite, as well as the copper modified montmorillonite were efficient in adsorption of aflatoxin B1, at different amounts of solid phase in suspension, and at different pH values. Thus, at the amount of solid phase in suspension 10 g/l, aflatoxin B1 adsorption index for montmorillonite was 100% at pH 3, 98% at pH 7 and 96% at pH 9. For copper modified montmorillonite, at the same amount of solid phase the following aflatoxin B1 adsorption indexes were achieved: 98% at pH 3, 98% at pH 7 and 96% at pH 9. No differences in adsorption of this toxin by both montmorillonites with decreasing the amount of solid phase in suspension (0.5 g/l) were observed. That means that ion exchange of inorganic cations in montmorillonite with copper ions, did not cause any changes in aflatoxin B1 adsorption, at pH 3, as well as at pH 7 and 9. It was also noticed that adsorption of aflatoxin B1 by both adsorbents was not pH dependent.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika - Rudarstvo, geologija i metalurgija
T1  - Ispitivanje mogućnosti dobijanja montmorilonita modifikovanog jonima bakra kao adsorbenta aflatoksina B1
EP  - 18
IS  - 4
SP  - 13
VL  - 60
UR  - conv_82
ER  - 

@article{
author = "Sekulić, Živko and Daković, Aleksandra and Rottinghaus, George E. and Milićević, Sonja and Stojanović, Jovica and Stanić, Tanja",
year = "2009",
abstract = "U ovom radu su dati rezultati ispitivanja mogućnosti dobijanja materijala za adsorpciju aflatoksina B1 modifikacijom minerala montmorilonita jonima bakra. Ispitivanja su rađena na bentonitskoj glini koja se eksploatiše u ležištu Sokolac kod Šipova u Republici Srpskoj. Rezultati pokazuju da stepen jonske izmene neorganskih katjona u montmorilonitu jonima bakra raste sa porastom polazne količine bakra u rastvoru. Za ispitivanja adsorpcije aflatoksina B1 na montmorilonitu modifikovanom jonima bakra je odabran proizvod sa sadržajem bakra 2.65%. Određeno je da montmorilonit, kao i montmorilonit modifikovan jonima bakra efikasno adsorbuju aflatoksin B1, pri različitim sadržajima čvrste faze u suspenziji, kao i na različitim pH. Pri sadržaju čvrste faze u supenziji 10 g/l, indeks adsorpcije aflatoksina B1 na montmorilonitu iznosi 100% na pH 3, 98% na pH 7 i 96% na pH 9. Na montmorilonitu modifikovanom jonima bakra, pri istom količini čvrste faze u suspenziji, dobijene su sledeće vrednosti indeksa adsorpcije aflatoksina B1: 98% na pH 3, 98% na pH 7 i 96% na pH 9. Sa smanjenjem količine čvrste faze u suspenziji (0.5 g/l), ne dolazi do smanjenja indeksa adsorpcije ovog toksina na oba adsorbenta. To znači da, jonska izmena neorganskih katjona u koncentratu montmorilonita sa jonima bakra nije dovela do smanjenja indeksa adsorpcije aflatoksina B1, kako na pH 3, tako i na pH 7 i 9. Zapaženo je i da adsorpcija aflatoksina B1 na oba adsorbenta ne zavisi od pH sredine., In this paper, the results of possibility for preparation of material for aflatoxin B1 adsorption, based on modification of montmorillonite with copper ions, re presented. The bentonite clay from Sokolac deposit (Šipovo, Bosnia) was used as the starting raw material. It was determined that ion exchange degree of inorganic cations in montmorillonite with copper ions increase with increasing the initial copper concentration in solution. The copper modified montmorillonite with 2.65% of copper was selected for aflatoxin B1 adsorption experiments. It was shown that montmorillonite, as well as the copper modified montmorillonite were efficient in adsorption of aflatoxin B1, at different amounts of solid phase in suspension, and at different pH values. Thus, at the amount of solid phase in suspension 10 g/l, aflatoxin B1 adsorption index for montmorillonite was 100% at pH 3, 98% at pH 7 and 96% at pH 9. For copper modified montmorillonite, at the same amount of solid phase the following aflatoxin B1 adsorption indexes were achieved: 98% at pH 3, 98% at pH 7 and 96% at pH 9. No differences in adsorption of this toxin by both montmorillonites with decreasing the amount of solid phase in suspension (0.5 g/l) were observed. That means that ion exchange of inorganic cations in montmorillonite with copper ions, did not cause any changes in aflatoxin B1 adsorption, at pH 3, as well as at pH 7 and 9. It was also noticed that adsorption of aflatoxin B1 by both adsorbents was not pH dependent.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika - Rudarstvo, geologija i metalurgija",
title = "Ispitivanje mogućnosti dobijanja montmorilonita modifikovanog jonima bakra kao adsorbenta aflatoksina B1",
pages = "18-13",
number = "4",
volume = "60",
url = "conv_82"
}

Sekulić, Ž., Daković, A., Rottinghaus, G. E., Milićević, S., Stojanović, J.,& Stanić, T.. (2009). Ispitivanje mogućnosti dobijanja montmorilonita modifikovanog jonima bakra kao adsorbenta aflatoksina B1. in Tehnika - Rudarstvo, geologija i metalurgija
Savez inženjera i tehničara Srbije, Beograd., 60(4), 13-18.
conv_82

Sekulić Ž, Daković A, Rottinghaus GE, Milićević S, Stojanović J, Stanić T. Ispitivanje mogućnosti dobijanja montmorilonita modifikovanog jonima bakra kao adsorbenta aflatoksina B1. in Tehnika - Rudarstvo, geologija i metalurgija. 2009;60(4):13-18.
conv_82 .

Sekulić, Živko, Daković, Aleksandra, Rottinghaus, George E., Milićević, Sonja, Stojanović, Jovica, Stanić, Tanja, "Ispitivanje mogućnosti dobijanja montmorilonita modifikovanog jonima bakra kao adsorbenta aflatoksina B1" in Tehnika - Rudarstvo, geologija i metalurgija, 60, no. 4 (2009):13-18,
conv_82 .

TY  - JOUR
AU  - Daković, Aleksandra
AU  - Sekulić, Živko
AU  - Rottinghaus, George E.
AU  - Matijašević, Srđan
AU  - Milićević, Sonja
AU  - Stojanović, Ana
PY  - 2008
UR  - https://ritnms.itnms.ac.rs/handle/123456789/134
AB  - U ovom radu prikazani su rezultati dobijanja materijala za adsorpciju aflatoksina B1 modifikacijom bentonita jonima bakra (Cu- MONT). Kao polazna sirovina korišćena je bentonitska glina koja se eksploatiše u ležištu Sokolac kod Šipova (Republika Srpska). Nakon modifikacije koncentrata montmorilonita (MONT) sa jonima bakra, ukupan sadržaj bakra u uzorku Cu-MONT je iznosio 2,65%. Pokazano je da MONT, kao i Cu-MONT efikasno adsorbuju aflatoksin B1, pri različitim masenim odnosima adsorbent : toksin i na različitim pH vrednostima. Određeno je da pri masenom odnosu adsorbent : toksin = 5000 : 1, indeks adsorpcije aflatoksina B1 na MONT iznosi 100% na pH 3, 98% na pH 7 i 96% na pH 9. Na Cu-MONT, pri istom masenom odnosu, dobijene su sledeće vrednosti indeksa adsorpcije aflatoksina B1: 98% na pH 3, 98% na pH 7 i 96% na pH 9. Primećeno je i da sa smanjenjem masenog odnosa adsorbent : aflatoksin B1 (maseni odnos 250 : 1), ne dolazi do smanjenja indeksa adsorpcije ovog toksina na oba adsorbenta. To znači da, jonska izmena neorganskih katjona u koncentratu montmorilonita sa jonima bakra nije dovela do smanjenja indeksa adsorpcije aflatoksina B1, kako na pH 3, tako i na pH 7 i 9. Zapaženo je i da adsorpcija aflatoksina B1 na oba adsorbenta ne zavisi od pH sredine.
AB  - In this paper, the results of preparation of material for adsorption of aflatoxin B1, based on modification of montmorillonite with copper ions (Cu-MONT), are presented. The bentonite clay from Sokolac deposit (Šipovo, Bosnia) was used as the starting raw material. After modification of concentrate of montmorillonite (MONT) with copper, the content of copper in Cu-MONT, was 2.65%. It was shown that MONT, as well as the Cu-MONT were efficient in adsorption of aflatoxin B1, at different mass ratios of adsorbent : toxin, and at different pH values. It was determined that for MONT, at the mass ratio adsorbent : toxin = 5000 : 1, aflatoxin B1 adsorption index was 100% at pH 3, 98% at pH 7 and 96% at pH 9. For Cu-MONT, at the same mass ratio, the following aflatoxin B1 adsorption indexes were achieved: 98% at pH 3, 98% at pH 7 and 96% at pH 9. No differences in adsorption of this toxin by both montmorillonites with decreasing the mass ratio of adsorbent : toxin (250 : 1) were observed. That means that ion exchange of inorganic cations in montmorillonite with copper ions did not cause any changes in aflatoxin B1 adsorption, at pH 3, as well as at pH 7 and 9. It was also noticed that adsorption of aflatoxin B1 by MONT and Cu-MONT was not pH dependent.
PB  - Univerzitet u Beogradu - Fakultet veterinarske medicine, Beograd
T2  - Veterinarski glasnik
T1  - Montmorilonit modifikovan jonima bakra - efikasan adsorbent aflatoksina B1
T1  - Montmorillonite modified with copper ions: Efficient adsorbent for aflatoxin B1
EP  - 42
IS  - 1-2
SP  - 35
VL  - 62
DO  - 10.2298/VETGL0802035D
UR  - conv_48
ER  - 

@article{
author = "Daković, Aleksandra and Sekulić, Živko and Rottinghaus, George E. and Matijašević, Srđan and Milićević, Sonja and Stojanović, Ana",
year = "2008",
abstract = "U ovom radu prikazani su rezultati dobijanja materijala za adsorpciju aflatoksina B1 modifikacijom bentonita jonima bakra (Cu- MONT). Kao polazna sirovina korišćena je bentonitska glina koja se eksploatiše u ležištu Sokolac kod Šipova (Republika Srpska). Nakon modifikacije koncentrata montmorilonita (MONT) sa jonima bakra, ukupan sadržaj bakra u uzorku Cu-MONT je iznosio 2,65%. Pokazano je da MONT, kao i Cu-MONT efikasno adsorbuju aflatoksin B1, pri različitim masenim odnosima adsorbent : toksin i na različitim pH vrednostima. Određeno je da pri masenom odnosu adsorbent : toksin = 5000 : 1, indeks adsorpcije aflatoksina B1 na MONT iznosi 100% na pH 3, 98% na pH 7 i 96% na pH 9. Na Cu-MONT, pri istom masenom odnosu, dobijene su sledeće vrednosti indeksa adsorpcije aflatoksina B1: 98% na pH 3, 98% na pH 7 i 96% na pH 9. Primećeno je i da sa smanjenjem masenog odnosa adsorbent : aflatoksin B1 (maseni odnos 250 : 1), ne dolazi do smanjenja indeksa adsorpcije ovog toksina na oba adsorbenta. To znači da, jonska izmena neorganskih katjona u koncentratu montmorilonita sa jonima bakra nije dovela do smanjenja indeksa adsorpcije aflatoksina B1, kako na pH 3, tako i na pH 7 i 9. Zapaženo je i da adsorpcija aflatoksina B1 na oba adsorbenta ne zavisi od pH sredine., In this paper, the results of preparation of material for adsorption of aflatoxin B1, based on modification of montmorillonite with copper ions (Cu-MONT), are presented. The bentonite clay from Sokolac deposit (Šipovo, Bosnia) was used as the starting raw material. After modification of concentrate of montmorillonite (MONT) with copper, the content of copper in Cu-MONT, was 2.65%. It was shown that MONT, as well as the Cu-MONT were efficient in adsorption of aflatoxin B1, at different mass ratios of adsorbent : toxin, and at different pH values. It was determined that for MONT, at the mass ratio adsorbent : toxin = 5000 : 1, aflatoxin B1 adsorption index was 100% at pH 3, 98% at pH 7 and 96% at pH 9. For Cu-MONT, at the same mass ratio, the following aflatoxin B1 adsorption indexes were achieved: 98% at pH 3, 98% at pH 7 and 96% at pH 9. No differences in adsorption of this toxin by both montmorillonites with decreasing the mass ratio of adsorbent : toxin (250 : 1) were observed. That means that ion exchange of inorganic cations in montmorillonite with copper ions did not cause any changes in aflatoxin B1 adsorption, at pH 3, as well as at pH 7 and 9. It was also noticed that adsorption of aflatoxin B1 by MONT and Cu-MONT was not pH dependent.",
publisher = "Univerzitet u Beogradu - Fakultet veterinarske medicine, Beograd",
journal = "Veterinarski glasnik",
title = "Montmorilonit modifikovan jonima bakra - efikasan adsorbent aflatoksina B1, Montmorillonite modified with copper ions: Efficient adsorbent for aflatoxin B1",
pages = "42-35",
number = "1-2",
volume = "62",
doi = "10.2298/VETGL0802035D",
url = "conv_48"
}

Daković, A., Sekulić, Ž., Rottinghaus, G. E., Matijašević, S., Milićević, S.,& Stojanović, A.. (2008). Montmorilonit modifikovan jonima bakra - efikasan adsorbent aflatoksina B1. in Veterinarski glasnik
Univerzitet u Beogradu - Fakultet veterinarske medicine, Beograd., 62(1-2), 35-42.
https://doi.org/10.2298/VETGL0802035D
conv_48

Daković A, Sekulić Ž, Rottinghaus GE, Matijašević S, Milićević S, Stojanović A. Montmorilonit modifikovan jonima bakra - efikasan adsorbent aflatoksina B1. in Veterinarski glasnik. 2008;62(1-2):35-42.
doi:10.2298/VETGL0802035D
conv_48 .

Daković, Aleksandra, Sekulić, Živko, Rottinghaus, George E., Matijašević, Srđan, Milićević, Sonja, Stojanović, Ana, "Montmorilonit modifikovan jonima bakra - efikasan adsorbent aflatoksina B1" in Veterinarski glasnik, 62, no. 1-2 (2008):35-42,
https://doi.org/10.2298/VETGL0802035D .,
conv_48 .