TY  - JOUR
AU  - Obradović, Milena
AU  - Daković, Aleksandra
AU  - Smiljanić, Danijela
AU  - Marković, Marija
AU  - Ožegović, Milica
AU  - Krstić, Jugoslav
AU  - Vuković, Nikola
AU  - Milojević-Rakić, Maja
PY  - 2024
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1222
AB  - Organobentonites have been applied for the removal of two common non-steroidal anti-inflammatory drugs, ibuprofen (IBU) and diclofenac sodium (DS), from aqueous solutions. Two surfactants, one with and the other without benzyl group (octadecyldimethylbenzylammonium chloride, ODMBA, and hexadecyltrimethylammonium bromide, HDTMA), in amounts equivalent to 50, 75, and 100% of the cation exchange capacity of bentonite were used for the preparation of organobentonites. Successful modification of bentonite was confirmed by several methods: X-ray powder diffraction (XRPD), point of the zero charge (pHPZC), determination of exchanged inorganic cations in bentonite, determination of textural properties, and scanning electron microscopy (SEM). Kinetic and thermodynamic data on the adsorption of IBU and DS showed that drug adsorption was controlled by the type and the amount of surfactant incorporated into the bentonite and by their arrangement in the interlayer space and at the surface of organobentonites. The adsorption of both drugs increased with an increase in the amount of both surfactants in organobentonites. The presence of the benzyl group in organobentonites enhanced the adsorption of IBU and DS and was more pronounced for IBU. Drug adsorption fits the pseudo-second-order kinetic model the best. The thermodynamic data revealed that the adsorption process was endothermic in nature and with increase of the amount of both surfactants drug adsorption processes were more spontaneous. The results obtained from this study revealed that adsorbents based on surfactants modified bentonite are promising candidates for IBU and DS removal from contaminated water.
PB  - MDPI
T2  - Processes
T1  - Bentonite Modified with Surfactants—Efficient Adsorbents for the Removal of Non-Steroidal Anti-Inflammatory Drugs
IS  - 1
SP  - 96
VL  - 12
DO  - 10.3390/pr12010096
ER  - 

@article{
author = "Obradović, Milena and Daković, Aleksandra and Smiljanić, Danijela and Marković, Marija and Ožegović, Milica and Krstić, Jugoslav and Vuković, Nikola and Milojević-Rakić, Maja",
year = "2024",
abstract = "Organobentonites have been applied for the removal of two common non-steroidal anti-inflammatory drugs, ibuprofen (IBU) and diclofenac sodium (DS), from aqueous solutions. Two surfactants, one with and the other without benzyl group (octadecyldimethylbenzylammonium chloride, ODMBA, and hexadecyltrimethylammonium bromide, HDTMA), in amounts equivalent to 50, 75, and 100% of the cation exchange capacity of bentonite were used for the preparation of organobentonites. Successful modification of bentonite was confirmed by several methods: X-ray powder diffraction (XRPD), point of the zero charge (pHPZC), determination of exchanged inorganic cations in bentonite, determination of textural properties, and scanning electron microscopy (SEM). Kinetic and thermodynamic data on the adsorption of IBU and DS showed that drug adsorption was controlled by the type and the amount of surfactant incorporated into the bentonite and by their arrangement in the interlayer space and at the surface of organobentonites. The adsorption of both drugs increased with an increase in the amount of both surfactants in organobentonites. The presence of the benzyl group in organobentonites enhanced the adsorption of IBU and DS and was more pronounced for IBU. Drug adsorption fits the pseudo-second-order kinetic model the best. The thermodynamic data revealed that the adsorption process was endothermic in nature and with increase of the amount of both surfactants drug adsorption processes were more spontaneous. The results obtained from this study revealed that adsorbents based on surfactants modified bentonite are promising candidates for IBU and DS removal from contaminated water.",
publisher = "MDPI",
journal = "Processes",
title = "Bentonite Modified with Surfactants—Efficient Adsorbents for the Removal of Non-Steroidal Anti-Inflammatory Drugs",
number = "1",
pages = "96",
volume = "12",
doi = "10.3390/pr12010096"
}

Obradović, M., Daković, A., Smiljanić, D., Marković, M., Ožegović, M., Krstić, J., Vuković, N.,& Milojević-Rakić, M.. (2024). Bentonite Modified with Surfactants—Efficient Adsorbents for the Removal of Non-Steroidal Anti-Inflammatory Drugs. in Processes
MDPI., 12(1), 96.
https://doi.org/10.3390/pr12010096

Obradović M, Daković A, Smiljanić D, Marković M, Ožegović M, Krstić J, Vuković N, Milojević-Rakić M. Bentonite Modified with Surfactants—Efficient Adsorbents for the Removal of Non-Steroidal Anti-Inflammatory Drugs. in Processes. 2024;12(1):96.
doi:10.3390/pr12010096 .

Obradović, Milena, Daković, Aleksandra, Smiljanić, Danijela, Marković, Marija, Ožegović, Milica, Krstić, Jugoslav, Vuković, Nikola, Milojević-Rakić, Maja, "Bentonite Modified with Surfactants—Efficient Adsorbents for the Removal of Non-Steroidal Anti-Inflammatory Drugs" in Processes, 12, no. 1 (2024):96,
https://doi.org/10.3390/pr12010096 . .

TY  - CONF
AU  - Marković, Marija
AU  - Obradović, Milena
AU  - Smiljanić, Danijela
AU  - Ožegović, Milica
AU  - Daković, Aleksandra
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1006
AB  - Природни минерали, зеолит и бентонит, модификовани са различитим
количинама катјонског сурфактанта, хексадецилтриметиламонијум-бромида су испи-
тивани као адсорбенти за уклањање диклофенака из водених раствора. Адсорбоване
количине диклофенака су расле са порастом количине сурфактанта код органозеолита
као и код органобентонита. Разлике у структури полазних минерала су условиле и
разлике у адсорпцији диклофенака на органозеолиту и органобентониту. Највећа
адсорпција диклофенака је постигнута на органобентониту код кога су сви неоргански
катјони измењени са сурфактантом. Резултати су показали да се органоминерали могу
разматрати као ефикасни адсорбенти за уклањање диклофенака из воде.
AB  - Natural minerals, zeolite and bentonite, modified with different amounts of
cationic surfactant, hexadecyltrimethylammonium bromide, were investigated as adsorbents
for the removal of diclofenac from aqueous solutions. The adsorbed amount of diclofenac
increased with the increasing the amount of surfactant in organozeolite as well as in
organobentonite. Differences in the structure of the starting minerals caused differences in
the adsorption of diclofenac on organozeolite and organobentonite. The highest adsorption
of diclofenac was achieved on organobentonite where all inorganic cations were exchanged
with surfactant. The results showed that organominerals can be considered as effective asorbents for the removal of diclofenac from water.
PB  - Beograd : Savez inženjera i tehničara Srbije
C3  - 44. Međunarodna konferencija Vodovod i kanalizacija '23
T1  - Примена органоминерала за уклањање емергентног загађивача диклофенака
T1  - Application of organominerals for the removal of the emerging contaminant diclofenac
EP  - 235
SP  - 229
ER  - 

@conference{
author = "Marković, Marija and Obradović, Milena and Smiljanić, Danijela and Ožegović, Milica and Daković, Aleksandra",
year = "2023",
abstract = "Природни минерали, зеолит и бентонит, модификовани са различитим
количинама катјонског сурфактанта, хексадецилтриметиламонијум-бромида су испи-
тивани као адсорбенти за уклањање диклофенака из водених раствора. Адсорбоване
количине диклофенака су расле са порастом количине сурфактанта код органозеолита
као и код органобентонита. Разлике у структури полазних минерала су условиле и
разлике у адсорпцији диклофенака на органозеолиту и органобентониту. Највећа
адсорпција диклофенака је постигнута на органобентониту код кога су сви неоргански
катјони измењени са сурфактантом. Резултати су показали да се органоминерали могу
разматрати као ефикасни адсорбенти за уклањање диклофенака из воде., Natural minerals, zeolite and bentonite, modified with different amounts of
cationic surfactant, hexadecyltrimethylammonium bromide, were investigated as adsorbents
for the removal of diclofenac from aqueous solutions. The adsorbed amount of diclofenac
increased with the increasing the amount of surfactant in organozeolite as well as in
organobentonite. Differences in the structure of the starting minerals caused differences in
the adsorption of diclofenac on organozeolite and organobentonite. The highest adsorption
of diclofenac was achieved on organobentonite where all inorganic cations were exchanged
with surfactant. The results showed that organominerals can be considered as effective asorbents for the removal of diclofenac from water.",
publisher = "Beograd : Savez inženjera i tehničara Srbije",
journal = "44. Međunarodna konferencija Vodovod i kanalizacija '23",
title = "Примена органоминерала за уклањање емергентног загађивача диклофенака, Application of organominerals for the removal of the emerging contaminant diclofenac",
pages = "235-229"
}

Marković, M., Obradović, M., Smiljanić, D., Ožegović, M.,& Daković, A.. (2023). Примена органоминерала за уклањање емергентног загађивача диклофенака. in 44. Međunarodna konferencija Vodovod i kanalizacija '23
Beograd : Savez inženjera i tehničara Srbije., 229-235.

Marković M, Obradović M, Smiljanić D, Ožegović M, Daković A. Примена органоминерала за уклањање емергентног загађивача диклофенака. in 44. Međunarodna konferencija Vodovod i kanalizacija '23. 2023;:229-235..

Marković, Marija, Obradović, Milena, Smiljanić, Danijela, Ožegović, Milica, Daković, Aleksandra, "Примена органоминерала за уклањање емергентног загађивача диклофенака" in 44. Međunarodna konferencija Vodovod i kanalizacija '23 (2023):229-235.

TY  - CONF
AU  - Smiljanić, Danijela
AU  - Daković, Aleksandra
AU  - Marković, Marija
AU  - Obradović, Milena
AU  - Ožegović, Milica
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/724
AB  - Površinski modifikovani prirodni zeoliti sa katjonskim surfaktantima su se pokazali kao obećavajući adsorbenti za uklanjanje emergentnih zagađivača - nesteroidnih antiinflamatornih lekova (diklofenak, ibuprofen, naproksen i ketoprofen). Nelinaran oblik adsorpcionih izotermi kao i adsorpcioni kapaciteti (Qmax vrednosti iz Langmirovog modela) poslužili su da se izvedu zaključci o mehanizmu adsorpcije i uticaju izbora polaznog materijala, tipa i količine surfaktanta na adsorpciju odabranih lekova.
PB  - Beograd : Institut za tehnologiju nuklearnih i drugih mineralnih sirovina
C3  - 14. Simpozijum „Rudarstvo 2023“ Održivi razvoj u rudarstvu i energetici
T1  - Površinski modifikovani zeoliti - efikasni adsorbenti emergentnih zagađivača
EP  - 36
SP  - 29
ER  - 

@conference{
author = "Smiljanić, Danijela and Daković, Aleksandra and Marković, Marija and Obradović, Milena and Ožegović, Milica",
year = "2023",
abstract = "Površinski modifikovani prirodni zeoliti sa katjonskim surfaktantima su se pokazali kao obećavajući adsorbenti za uklanjanje emergentnih zagađivača - nesteroidnih antiinflamatornih lekova (diklofenak, ibuprofen, naproksen i ketoprofen). Nelinaran oblik adsorpcionih izotermi kao i adsorpcioni kapaciteti (Qmax vrednosti iz Langmirovog modela) poslužili su da se izvedu zaključci o mehanizmu adsorpcije i uticaju izbora polaznog materijala, tipa i količine surfaktanta na adsorpciju odabranih lekova.",
publisher = "Beograd : Institut za tehnologiju nuklearnih i drugih mineralnih sirovina",
journal = "14. Simpozijum „Rudarstvo 2023“ Održivi razvoj u rudarstvu i energetici",
title = "Površinski modifikovani zeoliti - efikasni adsorbenti emergentnih zagađivača",
pages = "36-29"
}

Smiljanić, D., Daković, A., Marković, M., Obradović, M.,& Ožegović, M.. (2023). Površinski modifikovani zeoliti - efikasni adsorbenti emergentnih zagađivača. in 14. Simpozijum „Rudarstvo 2023“ Održivi razvoj u rudarstvu i energetici
Beograd : Institut za tehnologiju nuklearnih i drugih mineralnih sirovina., 29-36.

Smiljanić D, Daković A, Marković M, Obradović M, Ožegović M. Površinski modifikovani zeoliti - efikasni adsorbenti emergentnih zagađivača. in 14. Simpozijum „Rudarstvo 2023“ Održivi razvoj u rudarstvu i energetici. 2023;:29-36..

Smiljanić, Danijela, Daković, Aleksandra, Marković, Marija, Obradović, Milena, Ožegović, Milica, "Površinski modifikovani zeoliti - efikasni adsorbenti emergentnih zagađivača" in 14. Simpozijum „Rudarstvo 2023“ Održivi razvoj u rudarstvu i energetici (2023):29-36.

TY  - CONF
AU  - Marković, Marija
AU  - Daković, Aleksandra
AU  - Smiljanić, Danijela
AU  - Obradović, Milena
AU  - Ožegović, Milica
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/722
AB  - In this study three bentonite clays (bentonite from deposit Beretnica in Republic of Serbia, commercial bentonite and gray
clay from Šipovo deposit in Bosnia and Herzegovina) were investigated as adsorbents of aflatoxin B1 (AFB1). In a single
in vitro AFB1 adsorption experiment, all three bentonites showed high adsorption efficiency for AFB1 at pH 5. The effect
of adsorbent mass on AFB1 adsorption was also studied, with the same initial AFB1 concentration, at pH 3, and it was
shown that toxin adsorption decreased with decreasing amount of each bentonite in suspension. Thermal analysis was
performed in order to determine the structural differences between investigated bentonites. Results showed that gray clay
was trans-vacant bentonite while other two clays were cis-vacant bentonites. Aflatoxin B1 adsorption experiments, at pH
3, showed that trans-vacant gray bentonite had higher affinity for AFB1 than commercial cis-vacant bentonite. The
highest adsorption was achieved with cis-vacant bentonite from Beretnica deposit.
PB  - Belgrade : Association of Metallurgical Engineers of Serbia
C3  - 5th Metallurgical & Materials Engineering Congress of South-East Europe
T1  - Bentonite clays as aflatoxin B1 adsorbents
EP  - 16
SP  - 12
ER  - 

@conference{
author = "Marković, Marija and Daković, Aleksandra and Smiljanić, Danijela and Obradović, Milena and Ožegović, Milica",
year = "2023",
abstract = "In this study three bentonite clays (bentonite from deposit Beretnica in Republic of Serbia, commercial bentonite and gray
clay from Šipovo deposit in Bosnia and Herzegovina) were investigated as adsorbents of aflatoxin B1 (AFB1). In a single
in vitro AFB1 adsorption experiment, all three bentonites showed high adsorption efficiency for AFB1 at pH 5. The effect
of adsorbent mass on AFB1 adsorption was also studied, with the same initial AFB1 concentration, at pH 3, and it was
shown that toxin adsorption decreased with decreasing amount of each bentonite in suspension. Thermal analysis was
performed in order to determine the structural differences between investigated bentonites. Results showed that gray clay
was trans-vacant bentonite while other two clays were cis-vacant bentonites. Aflatoxin B1 adsorption experiments, at pH
3, showed that trans-vacant gray bentonite had higher affinity for AFB1 than commercial cis-vacant bentonite. The
highest adsorption was achieved with cis-vacant bentonite from Beretnica deposit.",
publisher = "Belgrade : Association of Metallurgical Engineers of Serbia",
journal = "5th Metallurgical & Materials Engineering Congress of South-East Europe",
title = "Bentonite clays as aflatoxin B1 adsorbents",
pages = "16-12"
}

Marković, M., Daković, A., Smiljanić, D., Obradović, M.,& Ožegović, M.. (2023). Bentonite clays as aflatoxin B1 adsorbents. in 5th Metallurgical & Materials Engineering Congress of South-East Europe
Belgrade : Association of Metallurgical Engineers of Serbia., 12-16.

Marković M, Daković A, Smiljanić D, Obradović M, Ožegović M. Bentonite clays as aflatoxin B1 adsorbents. in 5th Metallurgical & Materials Engineering Congress of South-East Europe. 2023;:12-16..

Marković, Marija, Daković, Aleksandra, Smiljanić, Danijela, Obradović, Milena, Ožegović, Milica, "Bentonite clays as aflatoxin B1 adsorbents" in 5th Metallurgical & Materials Engineering Congress of South-East Europe (2023):12-16.

TY  - CONF
AU  - Smiljanić, Danijela
AU  - Daković, Aleksandra
AU  - Obradović, Milena
AU  - Marković, Marija
AU  - Ožegović, Milica
AU  - Pantić, Milena
AU  - Krajišnik, Danina
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/723
AB  - In this study bentonite was modified with two chitosans, commercial or chitosan synthesized from mushroom. Obtained
products were subsequently treated with hexadecyltrimethyl ammonium bromide in the amount of 50% of the bentonite`s
CEC value. Starting material and all prepared composites were characterized by FTIR-ATR spectroscopy in order to
confirm modification with organic molecules. Adsorption of zearalenone (ZEN) by clay-chitosan composites and claychitosan-surfactant composites was investigated at pH 3. Results showed that adsorption of ZEN was higher for
composites that had both chitosan and surfactant, confirming that surfactant ions are responsible for ZEN adsorption.
Additionally, the effect of adsorbent mass on ZEN adsorption was investigated for clay-chitosan-surfactant composites
(pH 3) and results have shown that adsorption increased with increasing the amount of both composites.
PB  - Belgrade : Association of Metallurgical Engineers of Serbia
C3  - 5th Metallurgical & Materials Engineering Congress of South-East Europe
T1  - Clay-chitosan-surfactant composites as efficient adsorbents of zearalenone
EP  - 376
SP  - 371
ER  - 

@conference{
author = "Smiljanić, Danijela and Daković, Aleksandra and Obradović, Milena and Marković, Marija and Ožegović, Milica and Pantić, Milena and Krajišnik, Danina",
year = "2023",
abstract = "In this study bentonite was modified with two chitosans, commercial or chitosan synthesized from mushroom. Obtained
products were subsequently treated with hexadecyltrimethyl ammonium bromide in the amount of 50% of the bentonite`s
CEC value. Starting material and all prepared composites were characterized by FTIR-ATR spectroscopy in order to
confirm modification with organic molecules. Adsorption of zearalenone (ZEN) by clay-chitosan composites and claychitosan-surfactant composites was investigated at pH 3. Results showed that adsorption of ZEN was higher for
composites that had both chitosan and surfactant, confirming that surfactant ions are responsible for ZEN adsorption.
Additionally, the effect of adsorbent mass on ZEN adsorption was investigated for clay-chitosan-surfactant composites
(pH 3) and results have shown that adsorption increased with increasing the amount of both composites.",
publisher = "Belgrade : Association of Metallurgical Engineers of Serbia",
journal = "5th Metallurgical & Materials Engineering Congress of South-East Europe",
title = "Clay-chitosan-surfactant composites as efficient adsorbents of zearalenone",
pages = "376-371"
}

Smiljanić, D., Daković, A., Obradović, M., Marković, M., Ožegović, M., Pantić, M.,& Krajišnik, D.. (2023). Clay-chitosan-surfactant composites as efficient adsorbents of zearalenone. in 5th Metallurgical & Materials Engineering Congress of South-East Europe
Belgrade : Association of Metallurgical Engineers of Serbia., 371-376.

Smiljanić D, Daković A, Obradović M, Marković M, Ožegović M, Pantić M, Krajišnik D. Clay-chitosan-surfactant composites as efficient adsorbents of zearalenone. in 5th Metallurgical & Materials Engineering Congress of South-East Europe. 2023;:371-376..

Smiljanić, Danijela, Daković, Aleksandra, Obradović, Milena, Marković, Marija, Ožegović, Milica, Pantić, Milena, Krajišnik, Danina, "Clay-chitosan-surfactant composites as efficient adsorbents of zearalenone" in 5th Metallurgical & Materials Engineering Congress of South-East Europe (2023):371-376.

TY  - CONF
AU  - Smiljanić, Danijela
AU  - Daković, Aleksandra
AU  - Obradović, Milena
AU  - Ožegović, Milica
AU  - Marković, Marija
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1195
AB  - Numerous chemical compounds present in natural waters and wastewater are resistant to
conventional water treatments and persist in treated effluents. Among these substances,
pharmaceuticals, due to their widespread use, raise special concern due to their potentially
harmful effects on human health especially when they reach drinking water. One of the most
efficient technique for removal of pharmaceuticals from polluted water is their adsorption on
various adsorbents, such as activated carbons, clays (kaolin, bentonite, etc.) and zeolites. In
this study, the potential of modified bentonite for removal of carbamazepine, a
pharmaceutical with anticonvulsant and mood-stabilizing properties, was investigated. The
natural bentonite from Šipovo deposit, Bosnia and Herzegovina, was modified with the
cationic surfactant Arquad®2HT-75 in amounts equivalent to 50% and 100% of the
bentonite's cationic exchange capacity. Characterization of prepared samples by Fouriertransform
infrared spectroscopy and Simultaneous Thermal Analysis, confirmed presence of
surfactant in modified bentonites. Results on carbamazepine removal by modified bentonites
showed that its adsorption increased with increasing of the amount of surfactant as well as
with increasing of the initial pharmaceutical concentration. The highest adsorption of
carbamazepine was achieved with bentonite containing the highest amount of surfactant.
Since the natural bentonite has no affinity to remove carbamazepine, these findings suggest
that modified bentonite is a promising adsorbent for its removal from contaminated water.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Twenty-First Young Researchers’ Conference - Materials Science and Engineering
T1  - Bentonite modified with cationic surfactant as promissing adsorbent for carbamazepine
EP  - 20
SP  - 20
ER  - 

@conference{
author = "Smiljanić, Danijela and Daković, Aleksandra and Obradović, Milena and Ožegović, Milica and Marković, Marija",
year = "2023",
abstract = "Numerous chemical compounds present in natural waters and wastewater are resistant to
conventional water treatments and persist in treated effluents. Among these substances,
pharmaceuticals, due to their widespread use, raise special concern due to their potentially
harmful effects on human health especially when they reach drinking water. One of the most
efficient technique for removal of pharmaceuticals from polluted water is their adsorption on
various adsorbents, such as activated carbons, clays (kaolin, bentonite, etc.) and zeolites. In
this study, the potential of modified bentonite for removal of carbamazepine, a
pharmaceutical with anticonvulsant and mood-stabilizing properties, was investigated. The
natural bentonite from Šipovo deposit, Bosnia and Herzegovina, was modified with the
cationic surfactant Arquad®2HT-75 in amounts equivalent to 50% and 100% of the
bentonite's cationic exchange capacity. Characterization of prepared samples by Fouriertransform
infrared spectroscopy and Simultaneous Thermal Analysis, confirmed presence of
surfactant in modified bentonites. Results on carbamazepine removal by modified bentonites
showed that its adsorption increased with increasing of the amount of surfactant as well as
with increasing of the initial pharmaceutical concentration. The highest adsorption of
carbamazepine was achieved with bentonite containing the highest amount of surfactant.
Since the natural bentonite has no affinity to remove carbamazepine, these findings suggest
that modified bentonite is a promising adsorbent for its removal from contaminated water.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Twenty-First Young Researchers’ Conference - Materials Science and Engineering",
title = "Bentonite modified with cationic surfactant as promissing adsorbent for carbamazepine",
pages = "20-20"
}

Smiljanić, D., Daković, A., Obradović, M., Ožegović, M.,& Marković, M.. (2023). Bentonite modified with cationic surfactant as promissing adsorbent for carbamazepine. in Twenty-First Young Researchers’ Conference - Materials Science and Engineering
Belgrade : Institute of Technical Sciences of SASA., 20-20.

Smiljanić D, Daković A, Obradović M, Ožegović M, Marković M. Bentonite modified with cationic surfactant as promissing adsorbent for carbamazepine. in Twenty-First Young Researchers’ Conference - Materials Science and Engineering. 2023;:20-20..

Smiljanić, Danijela, Daković, Aleksandra, Obradović, Milena, Ožegović, Milica, Marković, Marija, "Bentonite modified with cationic surfactant as promissing adsorbent for carbamazepine" in Twenty-First Young Researchers’ Conference - Materials Science and Engineering (2023):20-20.

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  - CONF
AU  - Kojić, Marija
AU  - Porobić, Slavica
AU  - Katnić, Đurica
AU  - Petrović, Jelena
AU  - Simić, Marija
AU  - Ožegović, Milica
AU  - Marinović-Cincović, Milena
PY  - 2022
UR  - https://ritnms.itnms.ac.rs/handle/123456789/726
AB  - In this study, the adsorption capacity of Pb2+ removal from aqueous solution was examined by hydrochar of the spent mushroom substrate. In order to improve the adsorption capacity, hydrochar was previously activated with 2M KOH. The obtained results demonstrated that alkally activation increased the sorption capacity from 36 mg g-1 to 74 mg g-1. Structural characterization of activated and inactivated hydrochars were performed by FTIR analysis. Toward to obtained results of FTIR analysis, the increased of the oxygen functional groups (OFG) in activated hydrochars was perceived, which is contributed to the increase in the adsorption capacity of this carbonized material. Results indicated that spent mushroom substrate can be converted into hydrochar as a perspective sorbent for removal of Pb2+.
PB  - Banja Luka : University PIM
C3  - XI International Conference on Social and Technological Development STED 2022
T1  - Removal of Pb2+ from aqueous solutions by alkally activated hydrochars of the spent mushroom substrate
EP  - 90
SP  - 90
ER  - 

@conference{
author = "Kojić, Marija and Porobić, Slavica and Katnić, Đurica and Petrović, Jelena and Simić, Marija and Ožegović, Milica and Marinović-Cincović, Milena",
year = "2022",
abstract = "In this study, the adsorption capacity of Pb2+ removal from aqueous solution was examined by hydrochar of the spent mushroom substrate. In order to improve the adsorption capacity, hydrochar was previously activated with 2M KOH. The obtained results demonstrated that alkally activation increased the sorption capacity from 36 mg g-1 to 74 mg g-1. Structural characterization of activated and inactivated hydrochars were performed by FTIR analysis. Toward to obtained results of FTIR analysis, the increased of the oxygen functional groups (OFG) in activated hydrochars was perceived, which is contributed to the increase in the adsorption capacity of this carbonized material. Results indicated that spent mushroom substrate can be converted into hydrochar as a perspective sorbent for removal of Pb2+.",
publisher = "Banja Luka : University PIM",
journal = "XI International Conference on Social and Technological Development STED 2022",
title = "Removal of Pb2+ from aqueous solutions by alkally activated hydrochars of the spent mushroom substrate",
pages = "90-90"
}

Kojić, M., Porobić, S., Katnić, Đ., Petrović, J., Simić, M., Ožegović, M.,& Marinović-Cincović, M.. (2022). Removal of Pb2+ from aqueous solutions by alkally activated hydrochars of the spent mushroom substrate. in XI International Conference on Social and Technological Development STED 2022
Banja Luka : University PIM., 90-90.

Kojić M, Porobić S, Katnić Đ, Petrović J, Simić M, Ožegović M, Marinović-Cincović M. Removal of Pb2+ from aqueous solutions by alkally activated hydrochars of the spent mushroom substrate. in XI International Conference on Social and Technological Development STED 2022. 2022;:90-90..

Kojić, Marija, Porobić, Slavica, Katnić, Đurica, Petrović, Jelena, Simić, Marija, Ožegović, Milica, Marinović-Cincović, Milena, "Removal of Pb2+ from aqueous solutions by alkally activated hydrochars of the spent mushroom substrate" in XI International Conference on Social and Technological Development STED 2022 (2022):90-90.

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  - Smiljanić, Danijela
AU  - Daković, Aleksandra
AU  - Spasojević, Milica
AU  - Obradović, Milena
AU  - Marković, Marija
AU  - Langella, Alessio
AU  - de Gennaro, Bruno
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/731
AB  - In this work phillipsite-rich tuff (P) was modified by using amounts of cetylpyridinium
chloride (C) equivalent to 70% and 140% of the zeolite external cation exchange capacity
(ECEC). Accordingly, composites were denoted as PC-70 and PC-140. Prepared composites
were characterized by ATR-FTIR spectroscopy. Additionally, to test the stability of surfactant
molecules attached to the tuff surface, composites were extensively washed with distilled
water, and zeta potential of unwashed and washed samples was measured. FTIR spectra
confirmed presence of C in both composites. Zeta potential measurements showed that
composite containing surfactant in the amount below the ECEC value (PC-70) has much
higher stability and thus is a more appropriate adsorbent for potential practical application for
removal of different pollutants.
PB  - Zagreb : Croatian Zeolite Association
C3  - 9th Croatian-Slovenian-Serbian Symposium on Zeolites
T1  - Composites of phillipsite-rich tuff and surfactant – their characterization and stability
EP  - 46
SP  - 43
ER  - 

@conference{
author = "Smiljanić, Danijela and Daković, Aleksandra and Spasojević, Milica and Obradović, Milena and Marković, Marija and Langella, Alessio and de Gennaro, Bruno",
year = "2021",
abstract = "In this work phillipsite-rich tuff (P) was modified by using amounts of cetylpyridinium
chloride (C) equivalent to 70% and 140% of the zeolite external cation exchange capacity
(ECEC). Accordingly, composites were denoted as PC-70 and PC-140. Prepared composites
were characterized by ATR-FTIR spectroscopy. Additionally, to test the stability of surfactant
molecules attached to the tuff surface, composites were extensively washed with distilled
water, and zeta potential of unwashed and washed samples was measured. FTIR spectra
confirmed presence of C in both composites. Zeta potential measurements showed that
composite containing surfactant in the amount below the ECEC value (PC-70) has much
higher stability and thus is a more appropriate adsorbent for potential practical application for
removal of different pollutants.",
publisher = "Zagreb : Croatian Zeolite Association",
journal = "9th Croatian-Slovenian-Serbian Symposium on Zeolites",
title = "Composites of phillipsite-rich tuff and surfactant – their characterization and stability",
pages = "46-43"
}

Smiljanić, D., Daković, A., Spasojević, M., Obradović, M., Marković, M., Langella, A.,& de Gennaro, B.. (2021). Composites of phillipsite-rich tuff and surfactant – their characterization and stability. in 9th Croatian-Slovenian-Serbian Symposium on Zeolites
Zagreb : Croatian Zeolite Association., 43-46.

Smiljanić D, Daković A, Spasojević M, Obradović M, Marković M, Langella A, de Gennaro B. Composites of phillipsite-rich tuff and surfactant – their characterization and stability. in 9th Croatian-Slovenian-Serbian Symposium on Zeolites. 2021;:43-46..

Smiljanić, Danijela, Daković, Aleksandra, Spasojević, Milica, Obradović, Milena, Marković, Marija, Langella, Alessio, de Gennaro, Bruno, "Composites of phillipsite-rich tuff and surfactant – their characterization and stability" in 9th Croatian-Slovenian-Serbian Symposium on Zeolites (2021):43-46.

TY  - CONF
AU  - Daković, Aleksandra
AU  - Obradović, Milena
AU  - Marković, Marija
AU  - Smiljanić, Danijela
AU  - Spasojević, Milica
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/730
AB  - Organobentonites are usually synthesized by intercalating various long chain organic cations (surfactants) into the interlayer space of bentonite by ion exchange with naturally occurring exchangeable cations. Presence of surfactants in the interlamellar space of bentonite changes its surface properties from hydrophilic to hydrophobic [1].
In this study, results on characterization of organobentonites obtained by treatment of Ca/Na bentonite with different amounts of surfactant – octadecyldimethylbenzyl ammonium chloride – ODMBA (10, 20, 30, 50 and 100 % of cation exchange capacity of Ca/Na bentonite) are presented. Organobentonites are denoted as OB-10, OB-20, OB-30, OB-50 and OB-100 [2]. Characterization of organobentonites were done by XRD [2] and thermal (DTA/TG) analyses. DTA curves as well as the data for mass loss from TG curves of Ca/Na bentonite and organobentonites are presented in the graphical abstract. DTA/TG analysis can be used to differentiate peaks associated with weight loss and those associated with phase transition and is widely used in the study of thermal reactions of the natural clay minerals (e.g. Ca/Na bentonite). These reactions include dehydration, dehydroxylation as well as transformation of the clay to a meta-phase and recrystallization of the meta-phase into a crystalline phase. The first two reactions are endothermic whereas the recrystallization of the meta-phase is exothermic [3]. In the DTA curves of the organobentonites, additional intensive exothermic peaks at temperatures >300ºC were observed representing oxidation of the organic matter present in the interlayer space of clay. The relative intensity of these exothermic peaks increase with increasing amounts of ODMBA in organobentonite. From mass loss, it can be seen that when organic cations are present in the interllamelar space of clay, mass loss in the first temperature region is lower confirming that treatment of Ca/Na bentonite with ODMBA ions increase hydrophobicity of the clay surface.
PB  - Kosovska Mitrovica : Fakultet Tehničkih nauka
C3  - Deseti simpozijum o termodinamici i faznim dijagramima
T1  - Thermal and XRD analysis in characterization of bentonite modified with different amounts of surfactant
EP  - 57
SP  - 56
ER  - 

@conference{
author = "Daković, Aleksandra and Obradović, Milena and Marković, Marija and Smiljanić, Danijela and Spasojević, Milica",
year = "2021",
abstract = "Organobentonites are usually synthesized by intercalating various long chain organic cations (surfactants) into the interlayer space of bentonite by ion exchange with naturally occurring exchangeable cations. Presence of surfactants in the interlamellar space of bentonite changes its surface properties from hydrophilic to hydrophobic [1].
In this study, results on characterization of organobentonites obtained by treatment of Ca/Na bentonite with different amounts of surfactant – octadecyldimethylbenzyl ammonium chloride – ODMBA (10, 20, 30, 50 and 100 % of cation exchange capacity of Ca/Na bentonite) are presented. Organobentonites are denoted as OB-10, OB-20, OB-30, OB-50 and OB-100 [2]. Characterization of organobentonites were done by XRD [2] and thermal (DTA/TG) analyses. DTA curves as well as the data for mass loss from TG curves of Ca/Na bentonite and organobentonites are presented in the graphical abstract. DTA/TG analysis can be used to differentiate peaks associated with weight loss and those associated with phase transition and is widely used in the study of thermal reactions of the natural clay minerals (e.g. Ca/Na bentonite). These reactions include dehydration, dehydroxylation as well as transformation of the clay to a meta-phase and recrystallization of the meta-phase into a crystalline phase. The first two reactions are endothermic whereas the recrystallization of the meta-phase is exothermic [3]. In the DTA curves of the organobentonites, additional intensive exothermic peaks at temperatures >300ºC were observed representing oxidation of the organic matter present in the interlayer space of clay. The relative intensity of these exothermic peaks increase with increasing amounts of ODMBA in organobentonite. From mass loss, it can be seen that when organic cations are present in the interllamelar space of clay, mass loss in the first temperature region is lower confirming that treatment of Ca/Na bentonite with ODMBA ions increase hydrophobicity of the clay surface.",
publisher = "Kosovska Mitrovica : Fakultet Tehničkih nauka",
journal = "Deseti simpozijum o termodinamici i faznim dijagramima",
title = "Thermal and XRD analysis in characterization of bentonite modified with different amounts of surfactant",
pages = "57-56"
}

Daković, A., Obradović, M., Marković, M., Smiljanić, D.,& Spasojević, M.. (2021). Thermal and XRD analysis in characterization of bentonite modified with different amounts of surfactant. in Deseti simpozijum o termodinamici i faznim dijagramima
Kosovska Mitrovica : Fakultet Tehničkih nauka., 56-57.

Daković A, Obradović M, Marković M, Smiljanić D, Spasojević M. Thermal and XRD analysis in characterization of bentonite modified with different amounts of surfactant. in Deseti simpozijum o termodinamici i faznim dijagramima. 2021;:56-57..

Daković, Aleksandra, Obradović, Milena, Marković, Marija, Smiljanić, Danijela, Spasojević, Milica, "Thermal and XRD analysis in characterization of bentonite modified with different amounts of surfactant" in Deseti simpozijum o termodinamici i faznim dijagramima (2021):56-57.

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  - CONF
AU  - Kojić, Marija
AU  - Porobić, Slavica
AU  - Katnić, Đurica
AU  - Tadić, Julijana
AU  - Vasiljević, Bojana
AU  - Ožegović, Milica
AU  - Marinović-Cincović, Milena
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/733
AB  - A carbon-rich product, hydrochar, was synthesized by hydrothermal carbonization (HTC) of spent mushroom substrate (SMS), at temperature of 260 °C. The thermal kinetic analysis has shown that hydrothermally treatment improve the combustion behavior of hydrochar. The kinetic parameters were determined by Kissinger and Ozawa methods. The SMS-260 had a significantly lower activation energy compared to the SMS, which means that this hydrochar needs a smaller amount of energy to start combustion. Generally, the preliminary results show that HTC is an effective way to transform SMS into alternative solid biofuel.
PB  - Szeged : University of Szeged
C3  - 27th  International Symposium on Analytical and Environmental Problems
T1  - Thermal kinetic analysis of the spent mushroom substrate and hydrochar
EP  - 170
SP  - 168
ER  - 

@conference{
author = "Kojić, Marija and Porobić, Slavica and Katnić, Đurica and Tadić, Julijana and Vasiljević, Bojana and Ožegović, Milica and Marinović-Cincović, Milena",
year = "2021",
abstract = "A carbon-rich product, hydrochar, was synthesized by hydrothermal carbonization (HTC) of spent mushroom substrate (SMS), at temperature of 260 °C. The thermal kinetic analysis has shown that hydrothermally treatment improve the combustion behavior of hydrochar. The kinetic parameters were determined by Kissinger and Ozawa methods. The SMS-260 had a significantly lower activation energy compared to the SMS, which means that this hydrochar needs a smaller amount of energy to start combustion. Generally, the preliminary results show that HTC is an effective way to transform SMS into alternative solid biofuel.",
publisher = "Szeged : University of Szeged",
journal = "27th  International Symposium on Analytical and Environmental Problems",
title = "Thermal kinetic analysis of the spent mushroom substrate and hydrochar",
pages = "170-168"
}

Kojić, M., Porobić, S., Katnić, Đ., Tadić, J., Vasiljević, B., Ožegović, M.,& Marinović-Cincović, M.. (2021). Thermal kinetic analysis of the spent mushroom substrate and hydrochar. in 27th  International Symposium on Analytical and Environmental Problems
Szeged : University of Szeged., 168-170.

Kojić M, Porobić S, Katnić Đ, Tadić J, Vasiljević B, Ožegović M, Marinović-Cincović M. Thermal kinetic analysis of the spent mushroom substrate and hydrochar. in 27th  International Symposium on Analytical and Environmental Problems. 2021;:168-170..

Kojić, Marija, Porobić, Slavica, Katnić, Đurica, Tadić, Julijana, Vasiljević, Bojana, Ožegović, Milica, Marinović-Cincović, Milena, "Thermal kinetic analysis of the spent mushroom substrate and hydrochar" in 27th  International Symposium on Analytical and Environmental Problems (2021):168-170.

TY  - JOUR
AU  - Smiljanić, Danijela
AU  - Daković, Aleksandra
AU  - Obradović, Milena
AU  - Ožegović, Milica
AU  - Izzo, Francesco
AU  - Germinario, Chiara
AU  - de Gennaro, Bruno
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/579
AB  - This work aimed to test composites (surfactant modified zeolites prepared by treatment of natural zeolites-clinoptilolite (IZ CLI) and/or phillipsite (PHIL75)-rich tuffs with two different amounts of cationic surfactants: cetylpyridinium chloride (CPyCl) and Arquad(R) 2HT-75 (ARQ)) for the adsorption of salicylic acid (SA)-a common contaminant of emerging concern. Adsorption of SA was studied at different initial drug concentrations (in the range of 2-100 mg/L) in water solution. The Langmuir isotherm model showed the highest adsorption was achieved by bilayer composite of IZ CLI and CPyCl-around 11 mg/g. Kinetic runs were performed by using the initial drug concentration of 20 mg/L in the time interval from 0 to 75 min and pseudo-second order had good correlation with experimental data. The influence of the four different temperatures on the SA adsorption was also investigated and thermodynamic parameters suggested that the adsorption drug onto composites is an exothermic and nonspontaneous process, followed by the decrease of randomness at the solid/liquid interface during the adsorption. Zeta potential and Fourier-transform infrared spectroscopy with attenuated total reflectance (FTIR-ATR) had been performed for the characterization of composites after adsorption of SA confirming the presence of the drug at composite surfaces.
PB  - MDPI, Basel
T2  - Materials
T1  - Application of Surfactant Modified Natural Zeolites for the Removal of Salicylic Acid-A Contaminant of Emerging Concern
IS  - 24
VL  - 14
DO  - 10.3390/ma14247728
UR  - conv_930
ER  - 

@article{
author = "Smiljanić, Danijela and Daković, Aleksandra and Obradović, Milena and Ožegović, Milica and Izzo, Francesco and Germinario, Chiara and de Gennaro, Bruno",
year = "2021",
abstract = "This work aimed to test composites (surfactant modified zeolites prepared by treatment of natural zeolites-clinoptilolite (IZ CLI) and/or phillipsite (PHIL75)-rich tuffs with two different amounts of cationic surfactants: cetylpyridinium chloride (CPyCl) and Arquad(R) 2HT-75 (ARQ)) for the adsorption of salicylic acid (SA)-a common contaminant of emerging concern. Adsorption of SA was studied at different initial drug concentrations (in the range of 2-100 mg/L) in water solution. The Langmuir isotherm model showed the highest adsorption was achieved by bilayer composite of IZ CLI and CPyCl-around 11 mg/g. Kinetic runs were performed by using the initial drug concentration of 20 mg/L in the time interval from 0 to 75 min and pseudo-second order had good correlation with experimental data. The influence of the four different temperatures on the SA adsorption was also investigated and thermodynamic parameters suggested that the adsorption drug onto composites is an exothermic and nonspontaneous process, followed by the decrease of randomness at the solid/liquid interface during the adsorption. Zeta potential and Fourier-transform infrared spectroscopy with attenuated total reflectance (FTIR-ATR) had been performed for the characterization of composites after adsorption of SA confirming the presence of the drug at composite surfaces.",
publisher = "MDPI, Basel",
journal = "Materials",
title = "Application of Surfactant Modified Natural Zeolites for the Removal of Salicylic Acid-A Contaminant of Emerging Concern",
number = "24",
volume = "14",
doi = "10.3390/ma14247728",
url = "conv_930"
}

Smiljanić, D., Daković, A., Obradović, M., Ožegović, M., Izzo, F., Germinario, C.,& de Gennaro, B.. (2021). Application of Surfactant Modified Natural Zeolites for the Removal of Salicylic Acid-A Contaminant of Emerging Concern. in Materials
MDPI, Basel., 14(24).
https://doi.org/10.3390/ma14247728
conv_930

Smiljanić D, Daković A, Obradović M, Ožegović M, Izzo F, Germinario C, de Gennaro B. Application of Surfactant Modified Natural Zeolites for the Removal of Salicylic Acid-A Contaminant of Emerging Concern. in Materials. 2021;14(24).
doi:10.3390/ma14247728
conv_930 .

Smiljanić, Danijela, Daković, Aleksandra, Obradović, Milena, Ožegović, Milica, Izzo, Francesco, Germinario, Chiara, de Gennaro, Bruno, "Application of Surfactant Modified Natural Zeolites for the Removal of Salicylic Acid-A Contaminant of Emerging Concern" in Materials, 14, no. 24 (2021),
https://doi.org/10.3390/ma14247728 .,
conv_930 .

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  - Daković, Aleksandra
AU  - Spasojević, Milica
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/741
AB  - The natural kaolin from a plant for the production of quartz sand in Rgotina, Serbia (KR) was modified with two cationic surfactants - octadecyl dimethyl benzyl ammonium chloride (O) and hexadecyltrimethylammonium bromide (H). Both surfactants were added in amounts equal to 90% of kaolin cation exchange capacity (CEC). The obtained materials were denoted as OKR and HKR. Characterizations of KR, OKR, and HKR were done by Fourier transform infrared spectroscopy (FTIR) spectroscopy and zeta potential measurements. FTIR spectra and zeta potential measurements confirmed the presence of both surfactants at the kaolin surface. 
Adsorption of mycotoxins – zearalenone (ZEN) and ochratoxin A (OCHRA) was studied by the natural kaolin and organokaolines under in vitro conditions. The effects of the amount of the adsorbent, the initial ZEN and OCHRA concentrations, and pH, on adsorption of mycotoxins, were investigated. Preliminary results of adsorption of ZEN and OCHRA by KR showed that natural kaolin had no affinity to adsorb these mycotoxins. However, the presence of both organic cations in the kaolin structure significantly increased adsorption of ZEN and OCHRA. Adsorption of the mycotoxins by OKR and HKR increased with increasing the amount of each adsorbent in suspension. Slightly higher adsorption of ZEN than OCHRA by both adsorbents was observed at both pHs. 
ZEN and OCHRA adsorption increased for both OKR and HKR as the concentration of the initial toxins increased at pH 3 and 7. OCHRA and ZEN are hydrophobic molecules that possess different functional groups and may exist in various forms at different pH values. OCHRA adsorption by OKR and HKR followed nonlinear isotherms at pH 3 and 7, and higher adsorption capacity was obtained for OKR. Also, OCHRA adsorption capacity for OKR and HKR was much higher at pH 3. The obtained results suggest that adsorption of OCHRA was dependent on the form of OCHRA in solution and that type of surfactant had an influence on OCHRA adsorption. Adsorption of ZEN by organokaolines also showed nonlinear isotherms at pH 3 and 7 and similar amounts were adsorbed at both adsorbents at both pH values. The obtained adsorption capacities suggest that adsorption of ZEN was practically independent of the form of the toxin in solution and also on the type of the organic cations in the kaolin structure. Based on the obtained results, kaolin modified with surfactants may be effective materials for adsorption of ZEN and OCHRA.
PB  - Belgrade : Association of Metallurgical Engineers of Serbia
C3  - Metallurgical & Materials Engineering Congress of South-East Europe
T1  - Cationic surfactants modified kaolin – Efficient adsorbents for mycotoxins
EP  - 12
SP  - 12
ER  - 

@conference{
author = "Daković, Aleksandra and Spasojević, Milica",
year = "2019",
abstract = "The natural kaolin from a plant for the production of quartz sand in Rgotina, Serbia (KR) was modified with two cationic surfactants - octadecyl dimethyl benzyl ammonium chloride (O) and hexadecyltrimethylammonium bromide (H). Both surfactants were added in amounts equal to 90% of kaolin cation exchange capacity (CEC). The obtained materials were denoted as OKR and HKR. Characterizations of KR, OKR, and HKR were done by Fourier transform infrared spectroscopy (FTIR) spectroscopy and zeta potential measurements. FTIR spectra and zeta potential measurements confirmed the presence of both surfactants at the kaolin surface. 
Adsorption of mycotoxins – zearalenone (ZEN) and ochratoxin A (OCHRA) was studied by the natural kaolin and organokaolines under in vitro conditions. The effects of the amount of the adsorbent, the initial ZEN and OCHRA concentrations, and pH, on adsorption of mycotoxins, were investigated. Preliminary results of adsorption of ZEN and OCHRA by KR showed that natural kaolin had no affinity to adsorb these mycotoxins. However, the presence of both organic cations in the kaolin structure significantly increased adsorption of ZEN and OCHRA. Adsorption of the mycotoxins by OKR and HKR increased with increasing the amount of each adsorbent in suspension. Slightly higher adsorption of ZEN than OCHRA by both adsorbents was observed at both pHs. 
ZEN and OCHRA adsorption increased for both OKR and HKR as the concentration of the initial toxins increased at pH 3 and 7. OCHRA and ZEN are hydrophobic molecules that possess different functional groups and may exist in various forms at different pH values. OCHRA adsorption by OKR and HKR followed nonlinear isotherms at pH 3 and 7, and higher adsorption capacity was obtained for OKR. Also, OCHRA adsorption capacity for OKR and HKR was much higher at pH 3. The obtained results suggest that adsorption of OCHRA was dependent on the form of OCHRA in solution and that type of surfactant had an influence on OCHRA adsorption. Adsorption of ZEN by organokaolines also showed nonlinear isotherms at pH 3 and 7 and similar amounts were adsorbed at both adsorbents at both pH values. The obtained adsorption capacities suggest that adsorption of ZEN was practically independent of the form of the toxin in solution and also on the type of the organic cations in the kaolin structure. Based on the obtained results, kaolin modified with surfactants may be effective materials for adsorption of ZEN and OCHRA.",
publisher = "Belgrade : Association of Metallurgical Engineers of Serbia",
journal = "Metallurgical & Materials Engineering Congress of South-East Europe",
title = "Cationic surfactants modified kaolin – Efficient adsorbents for mycotoxins",
pages = "12-12"
}

Daković, A.,& Spasojević, M.. (2019). Cationic surfactants modified kaolin – Efficient adsorbents for mycotoxins. in Metallurgical & Materials Engineering Congress of South-East Europe
Belgrade : Association of Metallurgical Engineers of Serbia., 12-12.

Daković A, Spasojević M. Cationic surfactants modified kaolin – Efficient adsorbents for mycotoxins. in Metallurgical & Materials Engineering Congress of South-East Europe. 2019;:12-12..

Daković, Aleksandra, Spasojević, Milica, "Cationic surfactants modified kaolin – Efficient adsorbents for mycotoxins" in Metallurgical & Materials Engineering Congress of South-East Europe (2019):12-12.

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  - CONF
AU  - Smiljanić, Danijela
AU  - Daković, Aleksandra
AU  - de Gennaro, Bruno
AU  - Germinario, Chiara
AU  - Grifa, Celestino
AU  - Izzo, Francesco
AU  - Langella, Alessio
AU  - Spasojević, Milica
AU  - Mercurio, Mariano
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/735
AB  - Functionalization of natural zeolites (NZ) with cationic surfactants drastically alters the surface chemistry of zeolite and opens new applications possibilities for water treatment: adsorption of pharmaceuticals, pesticides, dyes, etc. The use of surface modified natural zeolites (SMNZs) could be a reliable approach for water treatment, as they can simultaneously remove cations, anions, and/or non-ionized molecules. The main advantages of the NZs, as starting materials, are their abundance in nature, low-cost and good stability. However, the main drawback is a potential instability of surfactant at the zeolite surface. Literature data showed that a certain amount of surfactant can be removed from the zeolite surface depending on experimental conditions, which could have a negative impact on water quality. To increase SMNZs stability and abate possible negative effects on the environment, it is suggested to use different novel types of surfactants (Reeve et al., 2018 and references therein). For these reasons, a zeolite-rich tuff IZ CLI (Turkey) with clinoptilolite as the main component (79%) has been modified using two cationic surfactants such as Cetylpyridinium chloride (CPyCl) and Arquad®2HT-75 (ARQ), the latter with two hydrocarbon chains. The bilayer composites (B), CPyCl-B and ARQ-B, were prepared using the method of fast functionalization (de Gennaro et al., 2016). To test the stability of composites, 1 g of CPyCl-B or ARQ-B was washed with 2 l of distilled water. Z-potential (Zetasizer Nano ZS90, Malvern Instruments) was measured for unmodified tuff as well as for composites before and after washing. Z-potential for IZ CLI has shown a negative value (-37.9 mV). The formation of a bilayer was confirmed by the inversion of Z - potential values which turned to positive for both composites CPyCl-B and ARQ-B (+37.7mV and +36.1mV, respectively). After extensive washing of composites, Z - potential of CPyCl-B has dropped to -7.9 mV indicating a significant loss of surfactant molecules. On the other hand, washing of ARQ-B almost did not affect Z-potential indicating great stability of bilayer at the zeolite surface when a two tailed surfactant was used. These results could open new possibilities for SMNZs applications in fields where surfactant stability is crucial, such as water treatment, thus promoting further research on the use of different
novel cationic surfactants.
PB  - Società Geologica Italiana
C3  - Congresso SIMP-SGI-SOGEI 2019 - 'Il tempo del pianeta Terra e il tempo dell'uomo: Le geoscienze fra passato e futuro'
T1  - Novel zeolite`s nanocomposites with a two-tailed cationic surfactant – Arquad ® 2HT-75 with increased stability
EP  - 185
SP  - 185
DO  - 10.3301/ABSGI.2019.05
ER  - 

@conference{
author = "Smiljanić, Danijela and Daković, Aleksandra and de Gennaro, Bruno and Germinario, Chiara and Grifa, Celestino and Izzo, Francesco and Langella, Alessio and Spasojević, Milica and Mercurio, Mariano",
year = "2019",
abstract = "Functionalization of natural zeolites (NZ) with cationic surfactants drastically alters the surface chemistry of zeolite and opens new applications possibilities for water treatment: adsorption of pharmaceuticals, pesticides, dyes, etc. The use of surface modified natural zeolites (SMNZs) could be a reliable approach for water treatment, as they can simultaneously remove cations, anions, and/or non-ionized molecules. The main advantages of the NZs, as starting materials, are their abundance in nature, low-cost and good stability. However, the main drawback is a potential instability of surfactant at the zeolite surface. Literature data showed that a certain amount of surfactant can be removed from the zeolite surface depending on experimental conditions, which could have a negative impact on water quality. To increase SMNZs stability and abate possible negative effects on the environment, it is suggested to use different novel types of surfactants (Reeve et al., 2018 and references therein). For these reasons, a zeolite-rich tuff IZ CLI (Turkey) with clinoptilolite as the main component (79%) has been modified using two cationic surfactants such as Cetylpyridinium chloride (CPyCl) and Arquad®2HT-75 (ARQ), the latter with two hydrocarbon chains. The bilayer composites (B), CPyCl-B and ARQ-B, were prepared using the method of fast functionalization (de Gennaro et al., 2016). To test the stability of composites, 1 g of CPyCl-B or ARQ-B was washed with 2 l of distilled water. Z-potential (Zetasizer Nano ZS90, Malvern Instruments) was measured for unmodified tuff as well as for composites before and after washing. Z-potential for IZ CLI has shown a negative value (-37.9 mV). The formation of a bilayer was confirmed by the inversion of Z - potential values which turned to positive for both composites CPyCl-B and ARQ-B (+37.7mV and +36.1mV, respectively). After extensive washing of composites, Z - potential of CPyCl-B has dropped to -7.9 mV indicating a significant loss of surfactant molecules. On the other hand, washing of ARQ-B almost did not affect Z-potential indicating great stability of bilayer at the zeolite surface when a two tailed surfactant was used. These results could open new possibilities for SMNZs applications in fields where surfactant stability is crucial, such as water treatment, thus promoting further research on the use of different
novel cationic surfactants.",
publisher = "Società Geologica Italiana",
journal = "Congresso SIMP-SGI-SOGEI 2019 - 'Il tempo del pianeta Terra e il tempo dell'uomo: Le geoscienze fra passato e futuro'",
title = "Novel zeolite`s nanocomposites with a two-tailed cationic surfactant – Arquad ® 2HT-75 with increased stability",
pages = "185-185",
doi = "10.3301/ABSGI.2019.05"
}

Smiljanić, D., Daković, A., de Gennaro, B., Germinario, C., Grifa, C., Izzo, F., Langella, A., Spasojević, M.,& Mercurio, M.. (2019). Novel zeolite`s nanocomposites with a two-tailed cationic surfactant – Arquad ® 2HT-75 with increased stability. in Congresso SIMP-SGI-SOGEI 2019 - 'Il tempo del pianeta Terra e il tempo dell'uomo: Le geoscienze fra passato e futuro'
Società Geologica Italiana., 185-185.
https://doi.org/10.3301/ABSGI.2019.05

Smiljanić D, Daković A, de Gennaro B, Germinario C, Grifa C, Izzo F, Langella A, Spasojević M, Mercurio M. Novel zeolite`s nanocomposites with a two-tailed cationic surfactant – Arquad ® 2HT-75 with increased stability. in Congresso SIMP-SGI-SOGEI 2019 - 'Il tempo del pianeta Terra e il tempo dell'uomo: Le geoscienze fra passato e futuro'. 2019;:185-185.
doi:10.3301/ABSGI.2019.05 .

Smiljanić, Danijela, Daković, Aleksandra, de Gennaro, Bruno, Germinario, Chiara, Grifa, Celestino, Izzo, Francesco, Langella, Alessio, Spasojević, Milica, Mercurio, Mariano, "Novel zeolite`s nanocomposites with a two-tailed cationic surfactant – Arquad ® 2HT-75 with increased stability" in Congresso SIMP-SGI-SOGEI 2019 - 'Il tempo del pianeta Terra e il tempo dell'uomo: Le geoscienze fra passato e futuro' (2019):185-185,
https://doi.org/10.3301/ABSGI.2019.05 . .

TY  - CONF
AU  - Spasojević, Milica
AU  - Daković, Aleksandra
AU  - Obradović, Milena
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/734
AB  - Mycotoxins are secondary metabolites produced by fungal species [1]. Zearalenone (ZEN) is estrogenic mycotoxin, produced by Fusarium species, commonly found on different cereal crops [2]. This mycotoxin causes reproductive disorders in animals. Addition of adsorbents is the most economical approach to decontaminate animal feed contaminated with mycotoxins. Commonly used mineral adsorbents for this purpose are zeolites and bentonite. In their natural forms, they can bind only aflatoxins [3]. For adsorption of other mycotoxins, chemical modification is needed. In this study, the kaolin from a plant for production of quartz sand in Rgotina is investigated as potential adsorbent for ZEN. Preliminary experiments confirmed that the natural kaolin has no affinity to adsorb this toxin. Thus, organokaolins were prepared by treatment of the natural mineral with three different levels of octadecyldimethylbenzyl ammonium (ODMBA) ions equivalent to 25, 50 and 90% of kaolin cation exchange capacity (CEC). Adsorption of ZEN on organokaolins was followed at pH 3 under in vitro conditions by using high performance liquid chromatography (HPLC). The effects of amounts of surfactant used to prepare organokaolins and adsorbent mass (5.0 - 0.5 mg/mL) on adsorption of ZEN was investigated with the initial concentration of ZEN at 2 mg/L. Results indicated that ZEN adsorption increased with increasing amounts of surfactant on the kaolin and with increasing the amount adsorbent in suspension. Based on the obtained results, adsorption of ZEN is related to the increasing number and availability of adsorption sites at organokaolinic surface.
PB  - Bor : University of Belgrade, Technical Faculty in Bor
C3  - 6th International Students Conference on Techincal Sciences
T1  - Adsorption of zearalenone by organokaolins
EP  - 7
SP  - 7
ER  - 

@conference{
author = "Spasojević, Milica and Daković, Aleksandra and Obradović, Milena",
year = "2019",
abstract = "Mycotoxins are secondary metabolites produced by fungal species [1]. Zearalenone (ZEN) is estrogenic mycotoxin, produced by Fusarium species, commonly found on different cereal crops [2]. This mycotoxin causes reproductive disorders in animals. Addition of adsorbents is the most economical approach to decontaminate animal feed contaminated with mycotoxins. Commonly used mineral adsorbents for this purpose are zeolites and bentonite. In their natural forms, they can bind only aflatoxins [3]. For adsorption of other mycotoxins, chemical modification is needed. In this study, the kaolin from a plant for production of quartz sand in Rgotina is investigated as potential adsorbent for ZEN. Preliminary experiments confirmed that the natural kaolin has no affinity to adsorb this toxin. Thus, organokaolins were prepared by treatment of the natural mineral with three different levels of octadecyldimethylbenzyl ammonium (ODMBA) ions equivalent to 25, 50 and 90% of kaolin cation exchange capacity (CEC). Adsorption of ZEN on organokaolins was followed at pH 3 under in vitro conditions by using high performance liquid chromatography (HPLC). The effects of amounts of surfactant used to prepare organokaolins and adsorbent mass (5.0 - 0.5 mg/mL) on adsorption of ZEN was investigated with the initial concentration of ZEN at 2 mg/L. Results indicated that ZEN adsorption increased with increasing amounts of surfactant on the kaolin and with increasing the amount adsorbent in suspension. Based on the obtained results, adsorption of ZEN is related to the increasing number and availability of adsorption sites at organokaolinic surface.",
publisher = "Bor : University of Belgrade, Technical Faculty in Bor",
journal = "6th International Students Conference on Techincal Sciences",
title = "Adsorption of zearalenone by organokaolins",
pages = "7-7"
}

Spasojević, M., Daković, A.,& Obradović, M.. (2019). Adsorption of zearalenone by organokaolins. in 6th International Students Conference on Techincal Sciences
Bor : University of Belgrade, Technical Faculty in Bor., 7-7.

Spasojević M, Daković A, Obradović M. Adsorption of zearalenone by organokaolins. in 6th International Students Conference on Techincal Sciences. 2019;:7-7..

Spasojević, Milica, Daković, Aleksandra, Obradović, Milena, "Adsorption of zearalenone by organokaolins" in 6th International Students Conference on Techincal Sciences (2019):7-7.

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  - Bugarčić, Mladen
AU  - Milošević, Dragana
AU  - Spasojević, Milica
AU  - Marunkić, Dunja
AU  - Kovačina, Jovanka
AU  - Milivojević, Milan
PY  - 2018
UR  - https://ritnms.itnms.ac.rs/handle/123456789/937
AB  - Point of zero charge (PZC) is one the most valuable parameter of adsorbent preparation process, in
wastewater management. Although, this parameter may be determined measuring the electrokinetic potential (zetta
potential) as the function of pH; material engineers oftenrely on pH PZC value which may be easily determined and
can give usefuladsorbent properties duringexploitation. Samples from previous study are characterized and their pH
PZC values are determined. Provided results are such intriguing since they brought conclusions that those values can
be explained by process parameters of the particular sample preparation. Sample marked as Cr2O3/Fe3O4/EVer have
lowest pH PZC value (4.75) and sample marked as MnFe2O4/EVer highest pH PZC value (7.47). Another study in this
paper showed that pH PZC value could be easily increased or decreased by simple base or acid treatment, respectfully.
As expected, samples treated with bases or prepared in alkali medium have greater adsorption capacity towards
cation species, up to 20 % more than base material in the case MnFe2O4/EVer.
PB  - Beograd : Institut za istraživanja i projektovanja u privredi
C3  - 2nd Young Researcher Conference
T1  - Adjsuting pH PZC value during and after adsorbent preparation
EP  - 51
SP  - 46
ER  - 

@conference{
author = "Bugarčić, Mladen and Milošević, Dragana and Spasojević, Milica and Marunkić, Dunja and Kovačina, Jovanka and Milivojević, Milan",
year = "2018",
abstract = "Point of zero charge (PZC) is one the most valuable parameter of adsorbent preparation process, in
wastewater management. Although, this parameter may be determined measuring the electrokinetic potential (zetta
potential) as the function of pH; material engineers oftenrely on pH PZC value which may be easily determined and
can give usefuladsorbent properties duringexploitation. Samples from previous study are characterized and their pH
PZC values are determined. Provided results are such intriguing since they brought conclusions that those values can
be explained by process parameters of the particular sample preparation. Sample marked as Cr2O3/Fe3O4/EVer have
lowest pH PZC value (4.75) and sample marked as MnFe2O4/EVer highest pH PZC value (7.47). Another study in this
paper showed that pH PZC value could be easily increased or decreased by simple base or acid treatment, respectfully.
As expected, samples treated with bases or prepared in alkali medium have greater adsorption capacity towards
cation species, up to 20 % more than base material in the case MnFe2O4/EVer.",
publisher = "Beograd : Institut za istraživanja i projektovanja u privredi",
journal = "2nd Young Researcher Conference",
title = "Adjsuting pH PZC value during and after adsorbent preparation",
pages = "51-46"
}

Bugarčić, M., Milošević, D., Spasojević, M., Marunkić, D., Kovačina, J.,& Milivojević, M.. (2018). Adjsuting pH PZC value during and after adsorbent preparation. in 2nd Young Researcher Conference
Beograd : Institut za istraživanja i projektovanja u privredi., 46-51.

Bugarčić M, Milošević D, Spasojević M, Marunkić D, Kovačina J, Milivojević M. Adjsuting pH PZC value during and after adsorbent preparation. in 2nd Young Researcher Conference. 2018;:46-51..

Bugarčić, Mladen, Milošević, Dragana, Spasojević, Milica, Marunkić, Dunja, Kovačina, Jovanka, Milivojević, Milan, "Adjsuting pH PZC value during and after adsorbent preparation" in 2nd Young Researcher Conference (2018):46-51.