TY  - JOUR
AU  - Stojanović, Jevrem
AU  - Milojević-Rakić, Maja
AU  - Bajuk-Bogdanović, Danica
AU  - Ranđelović, Dragana
AU  - Sokić, Miroslav
AU  - Otašević, Biljana
AU  - Malenović, Anđelija
AU  - Janošević Ležajić, Aleksandra
AU  - Protić, Ana
PY  - 2024
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1277
AB  - A chemometrically based approach was applied to select the most efficient drug adsorbent among the biochars obtained from the novel feedstock, the leaves of the invasive plant (Ailanthus altissima). The representative target adsorbates (atenolol, paracetamol, ketorolac and tetracycline) were selected on the basis of their physicochemical properties to cover a wide chemical space, which is the usual analytical challenge. Their adsorption was investigated using design of experiments as a comprehensive approach to optimise the performance of the adsorption system, rationalise the procedure and overcome common drawbacks. Among the response surface designs, the central composite design was selected as it allows the identification of important experimental factors (solid-to-liquid ratio, pH, ionic strength) and their interactions, and allows the selection of optimal experimental conditions to maximise adsorption performance. The biochars were prepared by pyrolysis at 500 °C and 800 °C (BC-500 and BC-800) and the ZnCl2-activated biochars were prepared at 650 °C and 800 °C (AcBC-650 and AcBC-800). The FTIR spectra revealed that increasing the pyrolysis temperature without activator decreases the intensity of all bands, while activation preserves functional groups, as evidenced by the spectra of AcBC-650 and AcBC-800. High temperatures during activation promoted the development of an efficient surface area, with the maximum observed for AcBC-800 reaching 347 m2 g−1. AcBC-800 was found to be the most efficient adsorbent with removal efficiencies of 34.1, 51.3, 55.9 and 38.2 % for atenolol, paracetamol, ketorolac and tetracycline, respectively. The models describing the relationship between the removal efficiency of AcBC-800 and the experimental factors studied, showed satisfactory predictive ability (predicted R2 > 0.8) and no significant lack-of-fit was observed. The results obtained, including the mathematical models, the properties of the adsorbates and the adsorbents, clearly indicate that the adsorption mechanisms of activated biochars are mainly based on hydrophobic interactions, pore filling and hydrogen bonding.
PB  - Elsevier
T2  - Heliyon
T1  - Chemometrically-aided general approach to novel adsorbents studies: Case study on the adsorption of pharmaceuticals by the carbonized Ailanthus altissima leaves
IS  - 14
SP  - e34841
VL  - 10
DO  - 10.1016/j.heliyon.2024.e34841
ER  - 

@article{
author = "Stojanović, Jevrem and Milojević-Rakić, Maja and Bajuk-Bogdanović, Danica and Ranđelović, Dragana and Sokić, Miroslav and Otašević, Biljana and Malenović, Anđelija and Janošević Ležajić, Aleksandra and Protić, Ana",
year = "2024",
abstract = "A chemometrically based approach was applied to select the most efficient drug adsorbent among the biochars obtained from the novel feedstock, the leaves of the invasive plant (Ailanthus altissima). The representative target adsorbates (atenolol, paracetamol, ketorolac and tetracycline) were selected on the basis of their physicochemical properties to cover a wide chemical space, which is the usual analytical challenge. Their adsorption was investigated using design of experiments as a comprehensive approach to optimise the performance of the adsorption system, rationalise the procedure and overcome common drawbacks. Among the response surface designs, the central composite design was selected as it allows the identification of important experimental factors (solid-to-liquid ratio, pH, ionic strength) and their interactions, and allows the selection of optimal experimental conditions to maximise adsorption performance. The biochars were prepared by pyrolysis at 500 °C and 800 °C (BC-500 and BC-800) and the ZnCl2-activated biochars were prepared at 650 °C and 800 °C (AcBC-650 and AcBC-800). The FTIR spectra revealed that increasing the pyrolysis temperature without activator decreases the intensity of all bands, while activation preserves functional groups, as evidenced by the spectra of AcBC-650 and AcBC-800. High temperatures during activation promoted the development of an efficient surface area, with the maximum observed for AcBC-800 reaching 347 m2 g−1. AcBC-800 was found to be the most efficient adsorbent with removal efficiencies of 34.1, 51.3, 55.9 and 38.2 % for atenolol, paracetamol, ketorolac and tetracycline, respectively. The models describing the relationship between the removal efficiency of AcBC-800 and the experimental factors studied, showed satisfactory predictive ability (predicted R2 > 0.8) and no significant lack-of-fit was observed. The results obtained, including the mathematical models, the properties of the adsorbates and the adsorbents, clearly indicate that the adsorption mechanisms of activated biochars are mainly based on hydrophobic interactions, pore filling and hydrogen bonding.",
publisher = "Elsevier",
journal = "Heliyon",
title = "Chemometrically-aided general approach to novel adsorbents studies: Case study on the adsorption of pharmaceuticals by the carbonized Ailanthus altissima leaves",
number = "14",
pages = "e34841",
volume = "10",
doi = "10.1016/j.heliyon.2024.e34841"
}

Stojanović, J., Milojević-Rakić, M., Bajuk-Bogdanović, D., Ranđelović, D., Sokić, M., Otašević, B., Malenović, A., Janošević Ležajić, A.,& Protić, A.. (2024). Chemometrically-aided general approach to novel adsorbents studies: Case study on the adsorption of pharmaceuticals by the carbonized Ailanthus altissima leaves. in Heliyon
Elsevier., 10(14), e34841.
https://doi.org/10.1016/j.heliyon.2024.e34841

Stojanović J, Milojević-Rakić M, Bajuk-Bogdanović D, Ranđelović D, Sokić M, Otašević B, Malenović A, Janošević Ležajić A, Protić A. Chemometrically-aided general approach to novel adsorbents studies: Case study on the adsorption of pharmaceuticals by the carbonized Ailanthus altissima leaves. in Heliyon. 2024;10(14):e34841.
doi:10.1016/j.heliyon.2024.e34841 .

Stojanović, Jevrem, Milojević-Rakić, Maja, Bajuk-Bogdanović, Danica, Ranđelović, Dragana, Sokić, Miroslav, Otašević, Biljana, Malenović, Anđelija, Janošević Ležajić, Aleksandra, Protić, Ana, "Chemometrically-aided general approach to novel adsorbents studies: Case study on the adsorption of pharmaceuticals by the carbonized Ailanthus altissima leaves" in Heliyon, 10, no. 14 (2024):e34841,
https://doi.org/10.1016/j.heliyon.2024.e34841 . .

TY  - CONF
AU  - Pačevski, Aleksandar
AU  - Zavašnik, Janez
AU  - Šoster, Aleš
AU  - Šestan, Andreja
AU  - Luković, Aleksandar
AU  - Jelić, Ivana
AU  - Kremenović, Aleksandar
AU  - Zdravković, Alena
AU  - Erić, Suzana
AU  - Bajuk-Bogdanović, Danica
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1299
AB  - Investigations of ore minerals, and mineralogical studies of the ore deposits in
general, are not only crucial for the interpretation of ore-forming processes and
genesis of ore deposits but also have a significant impact on the exploitation
efficiency and subsequent extractive metallurgy. Additionally, such researches also
comprise crystal chemistry and transformation processes in minerals (especially
sulphides) and thus providing a prominent contribution to the understanding of
presence and liberation of toxic elements in mining waste materials and their impact
on the environment. Simultaneously, by the oxidation processes precious metals (Au
and Ag) can be also liberated from the sulphides.
PB  - Bor : University of Belgrade, Technical Faculty in Bor
C3  - XIII International Mineral Processing and Recycling Conference
T1  - Micro- to nanoscale textures of ore minerals: methods of study and significance
EP  - 100
SP  - 98
ER  - 

@conference{
author = "Pačevski, Aleksandar and Zavašnik, Janez and Šoster, Aleš and Šestan, Andreja and Luković, Aleksandar and Jelić, Ivana and Kremenović, Aleksandar and Zdravković, Alena and Erić, Suzana and Bajuk-Bogdanović, Danica",
year = "2019",
abstract = "Investigations of ore minerals, and mineralogical studies of the ore deposits in
general, are not only crucial for the interpretation of ore-forming processes and
genesis of ore deposits but also have a significant impact on the exploitation
efficiency and subsequent extractive metallurgy. Additionally, such researches also
comprise crystal chemistry and transformation processes in minerals (especially
sulphides) and thus providing a prominent contribution to the understanding of
presence and liberation of toxic elements in mining waste materials and their impact
on the environment. Simultaneously, by the oxidation processes precious metals (Au
and Ag) can be also liberated from the sulphides.",
publisher = "Bor : University of Belgrade, Technical Faculty in Bor",
journal = "XIII International Mineral Processing and Recycling Conference",
title = "Micro- to nanoscale textures of ore minerals: methods of study and significance",
pages = "100-98"
}

Pačevski, A., Zavašnik, J., Šoster, A., Šestan, A., Luković, A., Jelić, I., Kremenović, A., Zdravković, A., Erić, S.,& Bajuk-Bogdanović, D.. (2019). Micro- to nanoscale textures of ore minerals: methods of study and significance. in XIII International Mineral Processing and Recycling Conference
Bor : University of Belgrade, Technical Faculty in Bor., 98-100.

Pačevski A, Zavašnik J, Šoster A, Šestan A, Luković A, Jelić I, Kremenović A, Zdravković A, Erić S, Bajuk-Bogdanović D. Micro- to nanoscale textures of ore minerals: methods of study and significance. in XIII International Mineral Processing and Recycling Conference. 2019;:98-100..

Pačevski, Aleksandar, Zavašnik, Janez, Šoster, Aleš, Šestan, Andreja, Luković, Aleksandar, Jelić, Ivana, Kremenović, Aleksandar, Zdravković, Alena, Erić, Suzana, Bajuk-Bogdanović, Danica, "Micro- to nanoscale textures of ore minerals: methods of study and significance" in XIII International Mineral Processing and Recycling Conference (2019):98-100.

TY  - JOUR
AU  - Nedić-Vasiljević, Bojana
AU  - Obradović, Milena
AU  - Bajuk-Bogdanović, Danica
AU  - Milojević-Rakić, Maja
AU  - Jovanović, Zoran
AU  - Gavrilov, Nemanja
AU  - Holclajtner-Antunović, Ivanka
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/524
AB  - Potassium tungstophosphate is supported on BEA zeolite by in situ synthesis for glyphosate removal. Spectroscopic measurements identified hydrogen bonding as a primal interaction of potassium salt and BEA zeolite. Composites are evaluated for glyphosate herbicide removal and adsorption process is analyzed using two isotherm models. Obtained adsorption capacities for all prepared composites lay between 45.2 and 92.2 mg of glyphosate per gram of investigated composite. Suspension acidity revealed that glyphosate is adsorbed mainly in the zwitter-ion form at the composite surface while the amount of potassium salt in the composites is crucial for the adsorption application. Exceptional adsorption behavior is postulated to come from a high degree of homogeneity among surface active sites which is confirmed by different experimental methods. Temperature programmed desorption of glyphosate coupled with mass spectrometer detected one broad, high-temperature peak which represents overlapped desorption processes from active sights of similar strength. Introduction of potassium tungstophosphate affects active sites present in BEA zeolite for glyphosate desorption and significantly increases the amount of adsorbed pesticide in comparison to BEA zeolite. Supporting of potassium tungstophosphate on BEA zeolite via in situ synthesis procedure enables the formation of highly efficient adsorbents and revealed their perspective environmental application.
PB  - Science Press, Beijing
T2  - Journal of Environmental Sciences
T1  - In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal
EP  - 147
SP  - 136
VL  - 81
DO  - 10.1016/j.jes.2019.01.018
UR  - conv_846
ER  - 

@article{
author = "Nedić-Vasiljević, Bojana and Obradović, Milena and Bajuk-Bogdanović, Danica and Milojević-Rakić, Maja and Jovanović, Zoran and Gavrilov, Nemanja and Holclajtner-Antunović, Ivanka",
year = "2019",
abstract = "Potassium tungstophosphate is supported on BEA zeolite by in situ synthesis for glyphosate removal. Spectroscopic measurements identified hydrogen bonding as a primal interaction of potassium salt and BEA zeolite. Composites are evaluated for glyphosate herbicide removal and adsorption process is analyzed using two isotherm models. Obtained adsorption capacities for all prepared composites lay between 45.2 and 92.2 mg of glyphosate per gram of investigated composite. Suspension acidity revealed that glyphosate is adsorbed mainly in the zwitter-ion form at the composite surface while the amount of potassium salt in the composites is crucial for the adsorption application. Exceptional adsorption behavior is postulated to come from a high degree of homogeneity among surface active sites which is confirmed by different experimental methods. Temperature programmed desorption of glyphosate coupled with mass spectrometer detected one broad, high-temperature peak which represents overlapped desorption processes from active sights of similar strength. Introduction of potassium tungstophosphate affects active sites present in BEA zeolite for glyphosate desorption and significantly increases the amount of adsorbed pesticide in comparison to BEA zeolite. Supporting of potassium tungstophosphate on BEA zeolite via in situ synthesis procedure enables the formation of highly efficient adsorbents and revealed their perspective environmental application.",
publisher = "Science Press, Beijing",
journal = "Journal of Environmental Sciences",
title = "In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal",
pages = "147-136",
volume = "81",
doi = "10.1016/j.jes.2019.01.018",
url = "conv_846"
}

Nedić-Vasiljević, B., Obradović, M., Bajuk-Bogdanović, D., Milojević-Rakić, M., Jovanović, Z., Gavrilov, N.,& Holclajtner-Antunović, I.. (2019). In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal. in Journal of Environmental Sciences
Science Press, Beijing., 81, 136-147.
https://doi.org/10.1016/j.jes.2019.01.018
conv_846

Nedić-Vasiljević B, Obradović M, Bajuk-Bogdanović D, Milojević-Rakić M, Jovanović Z, Gavrilov N, Holclajtner-Antunović I. In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal. in Journal of Environmental Sciences. 2019;81:136-147.
doi:10.1016/j.jes.2019.01.018
conv_846 .

Nedić-Vasiljević, Bojana, Obradović, Milena, Bajuk-Bogdanović, Danica, Milojević-Rakić, Maja, Jovanović, Zoran, Gavrilov, Nemanja, Holclajtner-Antunović, Ivanka, "In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal" in Journal of Environmental Sciences, 81 (2019):136-147,
https://doi.org/10.1016/j.jes.2019.01.018 .,
conv_846 .

TY  - JOUR
AU  - Krajišnik, Danina
AU  - Daković, Aleksandra
AU  - Milojević, Maja
AU  - Malenović, Anđelija
AU  - Kragović, Milan
AU  - Bajuk-Bogdanović, Danica
AU  - Dondur, Vera
AU  - Milić, Jela
PY  - 2011
UR  - https://ritnms.itnms.ac.rs/handle/123456789/189
AB  - In this study an investigation of a model drug sorption onto cationic surfactant-modified natural zeolites as a drug formulation excipient was performed. Natural zeolite was modified with cetylpyridinium chloride in amounts equivalent to 100, 200 and 300% of its external cation-exchange capacity. The starting material and obtained organozeolites were characterized by Fourier transform infrared spectroscopy, zeta potential measurements and thermal analysis. In vitro sorption of diclofenac sodium as a model drug was studied for all surfactant/zeolite composites by means of sorption isotherm measurements in aqueous solutions (pH 7.4). The modified zeolites with three levels of surfactant coverage within the short activation time were prepared. Zeta potential measurements and thermal analysis showed that when the surfactant loading level was equal to external cation-exchange value, almost monolayer of organic phase were present at the zeolitic surface while higher amounts of surfactant produced less extended bilayers, ordered bilayers or admicelles at the zeolitic surface. Modified zeolites, obtained in this manner, were effective in diclofenac sodium sorption and the organic phase derived from adsorbed cetylpyridinium chloride was the primary sorption phase for the model drug. The Langmuir isotherm was found to describe the equilibrium sorption data well over the entire concentration range. The separate contributions of the adsorption and partition to the total sorption of DS were analyzed mathematically. Results revealed that that adsorption and partitioning of the model drug take place simultaneously.
PB  - Elsevier, Amsterdam
T2  - Colloids and Surfaces B-Biointerfaces
T1  - Properties of diclofenac sodium sorption onto natural zeolite modified with cetylpyridinium chloride
EP  - 172
IS  - 1
SP  - 165
VL  - 83
DO  - 10.1016/j.colsurfb.2010.11.024
UR  - conv_598
ER  - 

@article{
author = "Krajišnik, Danina and Daković, Aleksandra and Milojević, Maja and Malenović, Anđelija and Kragović, Milan and Bajuk-Bogdanović, Danica and Dondur, Vera and Milić, Jela",
year = "2011",
abstract = "In this study an investigation of a model drug sorption onto cationic surfactant-modified natural zeolites as a drug formulation excipient was performed. Natural zeolite was modified with cetylpyridinium chloride in amounts equivalent to 100, 200 and 300% of its external cation-exchange capacity. The starting material and obtained organozeolites were characterized by Fourier transform infrared spectroscopy, zeta potential measurements and thermal analysis. In vitro sorption of diclofenac sodium as a model drug was studied for all surfactant/zeolite composites by means of sorption isotherm measurements in aqueous solutions (pH 7.4). The modified zeolites with three levels of surfactant coverage within the short activation time were prepared. Zeta potential measurements and thermal analysis showed that when the surfactant loading level was equal to external cation-exchange value, almost monolayer of organic phase were present at the zeolitic surface while higher amounts of surfactant produced less extended bilayers, ordered bilayers or admicelles at the zeolitic surface. Modified zeolites, obtained in this manner, were effective in diclofenac sodium sorption and the organic phase derived from adsorbed cetylpyridinium chloride was the primary sorption phase for the model drug. The Langmuir isotherm was found to describe the equilibrium sorption data well over the entire concentration range. The separate contributions of the adsorption and partition to the total sorption of DS were analyzed mathematically. Results revealed that that adsorption and partitioning of the model drug take place simultaneously.",
publisher = "Elsevier, Amsterdam",
journal = "Colloids and Surfaces B-Biointerfaces",
title = "Properties of diclofenac sodium sorption onto natural zeolite modified with cetylpyridinium chloride",
pages = "172-165",
number = "1",
volume = "83",
doi = "10.1016/j.colsurfb.2010.11.024",
url = "conv_598"
}

Krajišnik, D., Daković, A., Milojević, M., Malenović, A., Kragović, M., Bajuk-Bogdanović, D., Dondur, V.,& Milić, J.. (2011). Properties of diclofenac sodium sorption onto natural zeolite modified with cetylpyridinium chloride. in Colloids and Surfaces B-Biointerfaces
Elsevier, Amsterdam., 83(1), 165-172.
https://doi.org/10.1016/j.colsurfb.2010.11.024
conv_598

Krajišnik D, Daković A, Milojević M, Malenović A, Kragović M, Bajuk-Bogdanović D, Dondur V, Milić J. Properties of diclofenac sodium sorption onto natural zeolite modified with cetylpyridinium chloride. in Colloids and Surfaces B-Biointerfaces. 2011;83(1):165-172.
doi:10.1016/j.colsurfb.2010.11.024
conv_598 .

Krajišnik, Danina, Daković, Aleksandra, Milojević, Maja, Malenović, Anđelija, Kragović, Milan, Bajuk-Bogdanović, Danica, Dondur, Vera, Milić, Jela, "Properties of diclofenac sodium sorption onto natural zeolite modified with cetylpyridinium chloride" in Colloids and Surfaces B-Biointerfaces, 83, no. 1 (2011):165-172,
https://doi.org/10.1016/j.colsurfb.2010.11.024 .,
conv_598 .