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 .