TY  - JOUR
AU  - Nešić, Aleksandra
AU  - Veličković, Sava J.
AU  - Antonović, Dušan
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5780
AB  - Pectin, with its tendency to gel in the presence of metal ions has become a widely used material for capturing the metal ions from wastewaters. Its dye-capturing properties have been much less investigated, and this paper is the first to show how films based on amidated pectin can be used for cationic dye adsorption. In the present study amidated pectin/montmorillonite composite films were synthesized by membrane casting, and they are stable in aqueous solution both below and above pectin pK(a). FTIR, thermogravimetry and SEM-EDAX have confirmed the presence of montmorillonite in the cast films and the interactions between the two constituents. In order to evaluate the cationic dye adsorption of these films Basic Yellow 28 was used, showing that the films have higher adsorption capacity compared to the others reported in the literature. The results were fitted into Langmuir, Freundlich and Temkin isotherms indicating an exothermic process and setting the optimum amount of montmorillonite in the films to 30% of pectin mass. According to the Langmuir isotherm the maximum adsorption capacity is 571.4 mg/g.
PB  - Elsevier
T2  - Colloids and Surfaces. B: Biointerfaces
T1  - Novel composite films based on amidated pectin for cationic dye adsorption
EP  - 626
SP  - 620
VL  - 116
DO  - 10.1016/j.colsurfb.2013.10.031
ER  - 

@article{
author = "Nešić, Aleksandra and Veličković, Sava J. and Antonović, Dušan",
year = "2014",
abstract = "Pectin, with its tendency to gel in the presence of metal ions has become a widely used material for capturing the metal ions from wastewaters. Its dye-capturing properties have been much less investigated, and this paper is the first to show how films based on amidated pectin can be used for cationic dye adsorption. In the present study amidated pectin/montmorillonite composite films were synthesized by membrane casting, and they are stable in aqueous solution both below and above pectin pK(a). FTIR, thermogravimetry and SEM-EDAX have confirmed the presence of montmorillonite in the cast films and the interactions between the two constituents. In order to evaluate the cationic dye adsorption of these films Basic Yellow 28 was used, showing that the films have higher adsorption capacity compared to the others reported in the literature. The results were fitted into Langmuir, Freundlich and Temkin isotherms indicating an exothermic process and setting the optimum amount of montmorillonite in the films to 30% of pectin mass. According to the Langmuir isotherm the maximum adsorption capacity is 571.4 mg/g.",
publisher = "Elsevier",
journal = "Colloids and Surfaces. B: Biointerfaces",
title = "Novel composite films based on amidated pectin for cationic dye adsorption",
pages = "626-620",
volume = "116",
doi = "10.1016/j.colsurfb.2013.10.031"
}

Nešić, A., Veličković, S. J.,& Antonović, D.. (2014). Novel composite films based on amidated pectin for cationic dye adsorption. in Colloids and Surfaces. B: Biointerfaces
Elsevier., 116, 620-626.
https://doi.org/10.1016/j.colsurfb.2013.10.031

Nešić A, Veličković SJ, Antonović D. Novel composite films based on amidated pectin for cationic dye adsorption. in Colloids and Surfaces. B: Biointerfaces. 2014;116:620-626.
doi:10.1016/j.colsurfb.2013.10.031 .

Nešić, Aleksandra, Veličković, Sava J., Antonović, Dušan, "Novel composite films based on amidated pectin for cationic dye adsorption" in Colloids and Surfaces. B: Biointerfaces, 116 (2014):620-626,
https://doi.org/10.1016/j.colsurfb.2013.10.031 . .

TY  - JOUR
AU  - Nešić, Aleksandra
AU  - Kokunešoski, Maja
AU  - Ilić, Svetlana M.
AU  - Gordić, Milan V.
AU  - Ostojić, Sanja
AU  - Micić, Darko M.
AU  - Veličković, Sava J.
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5757
AB  - Manufacturing of synthetic composites consumes huge energy and their disposal at the end of the life cycle is very difficult since there is virtually no recycling option. Therefore, biocomposite materials have recently received considerable attention in academic research and industrial application compared to the synthetic composite materials due biodegradability, nontoxicity and economical point of view. Biocomposite membranes of highly methylated pectin and SBA-15, a form of mesoporous silica, were prepared by membrane casting. The amount of SBA-15 was 10%, 20% and 30% by membrane mass. These membranes were characterized by optical microscopy, FTIR, XRD, thermogravimetry, mechanical analysis and swelling in water, HCl, NaOH and methanol. The incorporation of SBA-15 in pectin matrix enhanced the stability of these membranes in all tested solutions, compared to the pure pectin membranes. The pectin/SBA photomicrographs contain rod-like domains which indicate the presence of SBA-15 in membrane. Mechanical analysis proves that incorporation of SBA-15 enhances the elasticity and tensile strength of pectin membranes. Thermogravimety in nitrogen has shown that the presence of SBA-15 in the membranes increased the onset temperatures of pectin degradation. The novel composite material represents promising way for practical membrane application. (C) 2014 Elsevier Ltd. All rights reserved.
PB  - Elsevier Ltd.
T2  - Composites: Part B: Engineering
T1  - Biocomposite membranes of highly methylated pectin and mesoporous silica SBA-15
EP  - 167
SP  - 162
VL  - 64
DO  - 10.1016/j.compositesb.2014.04.019
ER  - 

@article{
author = "Nešić, Aleksandra and Kokunešoski, Maja and Ilić, Svetlana M. and Gordić, Milan V. and Ostojić, Sanja and Micić, Darko M. and Veličković, Sava J.",
year = "2014",
abstract = "Manufacturing of synthetic composites consumes huge energy and their disposal at the end of the life cycle is very difficult since there is virtually no recycling option. Therefore, biocomposite materials have recently received considerable attention in academic research and industrial application compared to the synthetic composite materials due biodegradability, nontoxicity and economical point of view. Biocomposite membranes of highly methylated pectin and SBA-15, a form of mesoporous silica, were prepared by membrane casting. The amount of SBA-15 was 10%, 20% and 30% by membrane mass. These membranes were characterized by optical microscopy, FTIR, XRD, thermogravimetry, mechanical analysis and swelling in water, HCl, NaOH and methanol. The incorporation of SBA-15 in pectin matrix enhanced the stability of these membranes in all tested solutions, compared to the pure pectin membranes. The pectin/SBA photomicrographs contain rod-like domains which indicate the presence of SBA-15 in membrane. Mechanical analysis proves that incorporation of SBA-15 enhances the elasticity and tensile strength of pectin membranes. Thermogravimety in nitrogen has shown that the presence of SBA-15 in the membranes increased the onset temperatures of pectin degradation. The novel composite material represents promising way for practical membrane application. (C) 2014 Elsevier Ltd. All rights reserved.",
publisher = "Elsevier Ltd.",
journal = "Composites: Part B: Engineering",
title = "Biocomposite membranes of highly methylated pectin and mesoporous silica SBA-15",
pages = "167-162",
volume = "64",
doi = "10.1016/j.compositesb.2014.04.019"
}

Nešić, A., Kokunešoski, M., Ilić, S. M., Gordić, M. V., Ostojić, S., Micić, D. M.,& Veličković, S. J.. (2014). Biocomposite membranes of highly methylated pectin and mesoporous silica SBA-15. in Composites: Part B: Engineering
Elsevier Ltd.., 64, 162-167.
https://doi.org/10.1016/j.compositesb.2014.04.019

Nešić A, Kokunešoski M, Ilić SM, Gordić MV, Ostojić S, Micić DM, Veličković SJ. Biocomposite membranes of highly methylated pectin and mesoporous silica SBA-15. in Composites: Part B: Engineering. 2014;64:162-167.
doi:10.1016/j.compositesb.2014.04.019 .

Nešić, Aleksandra, Kokunešoski, Maja, Ilić, Svetlana M., Gordić, Milan V., Ostojić, Sanja, Micić, Darko M., Veličković, Sava J., "Biocomposite membranes of highly methylated pectin and mesoporous silica SBA-15" in Composites: Part B: Engineering, 64 (2014):162-167,
https://doi.org/10.1016/j.compositesb.2014.04.019 . .

TY  - JOUR
AU  - Nešić, Aleksandra
AU  - Veličković, Sava J.
AU  - Antonović, Dušan
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5705
AB  - This study represents new material based on chitosan modified by zeolite A as adsorbent for anionic dye, using Bezactive Orange 16 as a model compound. Interactions between dye and chitosan/zeolite A film at initial concentrations and pH dye solution was investigated. In order to determine kinetics and the mechanism of adsorption four kinetic models were used. The results showed that the adsorption of Bezactive Orange 16 dye onto chitosan/zeolite A can be best described by pseudo-second order model. According to the Langmuir model, the maximum adsorption capacity reached 305.8 mg/g. The films could be potentially used as absorbents for anionic dye removal in wastewater treatment process. (C) 2013 Elsevier Ltd. All rights reserved.
T2  - Composites: Part B: Engineering
T1  - Modification of chitosan by zeolite A and adsorption of Bezactive Orange 16 from aqueous solution
EP  - 151
SP  - 145
VL  - 53
DO  - 10.1016/j.compositesb.2013.04.053
ER  - 

@article{
author = "Nešić, Aleksandra and Veličković, Sava J. and Antonović, Dušan",
year = "2013",
abstract = "This study represents new material based on chitosan modified by zeolite A as adsorbent for anionic dye, using Bezactive Orange 16 as a model compound. Interactions between dye and chitosan/zeolite A film at initial concentrations and pH dye solution was investigated. In order to determine kinetics and the mechanism of adsorption four kinetic models were used. The results showed that the adsorption of Bezactive Orange 16 dye onto chitosan/zeolite A can be best described by pseudo-second order model. According to the Langmuir model, the maximum adsorption capacity reached 305.8 mg/g. The films could be potentially used as absorbents for anionic dye removal in wastewater treatment process. (C) 2013 Elsevier Ltd. All rights reserved.",
journal = "Composites: Part B: Engineering",
title = "Modification of chitosan by zeolite A and adsorption of Bezactive Orange 16 from aqueous solution",
pages = "151-145",
volume = "53",
doi = "10.1016/j.compositesb.2013.04.053"
}

Nešić, A., Veličković, S. J.,& Antonović, D.. (2013). Modification of chitosan by zeolite A and adsorption of Bezactive Orange 16 from aqueous solution. in Composites: Part B: Engineering, 53, 145-151.
https://doi.org/10.1016/j.compositesb.2013.04.053

Nešić A, Veličković SJ, Antonović D. Modification of chitosan by zeolite A and adsorption of Bezactive Orange 16 from aqueous solution. in Composites: Part B: Engineering. 2013;53:145-151.
doi:10.1016/j.compositesb.2013.04.053 .

Nešić, Aleksandra, Veličković, Sava J., Antonović, Dušan, "Modification of chitosan by zeolite A and adsorption of Bezactive Orange 16 from aqueous solution" in Composites: Part B: Engineering, 53 (2013):145-151,
https://doi.org/10.1016/j.compositesb.2013.04.053 . .

TY  - JOUR
AU  - Nešić, Aleksandra
AU  - Veličković, Sava J.
AU  - Antonović, Dušan
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5670
AB  - The synthesis, characterization and environmental application of chitosan/montmorillonite membrane for adsorption Bezactiv Orange V-3R were investigated. Chitosan/montmorillonite membranes were synthesized in different ratios, containing 10-50% of montmorillonite (MMT) in membrane. These membranes were characterized by using Fourier transform infrared spectroscopy (FTIR), thermogravimetry (TG) and scanning electron microscopy (SEM). The adsorption kinetics were investigated using three different concentrations of Bezactiv Orange dye (30, 50 and 80 mg/L). The adsorption capacity increases with increasing amount of MMT in membranes. These membranes show the highest adsorption capacity when the initial dye concentration was 80 mg/L The results show that the optimum condition for adsorption of Bezactiv Orange is pH 6. A comparison of kinetic models was evaluated for the pseudo-first and pseudo-second order and intra-particle diffusion. The experimental data were fitted to the pseudo-second order kinetic model, and also followed by intra-particle diffusion. Intra-particle diffusion is not the only rate-controlling step. The Langmuir and Freundlich adsorption isotherms were applied to experimental equilibrium data at different concentration of dye solution. The results indicated the competency of chitosan/MMT membranes adsorbent for Bezactiv Orange adsorption. (C) 2012 Elsevier B.V. All rights reserved.
T2  - Journal of Hazardous Materials
T1  - Characterization of chitosan/montmorillonite membranes as adsorbents for Bezactiv Orange V-3R dye
EP  - 263
SP  - 256
VL  - 209
DO  - 10.1016/j.jhazmat.2012.01.020
ER  - 

@article{
author = "Nešić, Aleksandra and Veličković, Sava J. and Antonović, Dušan",
year = "2012",
abstract = "The synthesis, characterization and environmental application of chitosan/montmorillonite membrane for adsorption Bezactiv Orange V-3R were investigated. Chitosan/montmorillonite membranes were synthesized in different ratios, containing 10-50% of montmorillonite (MMT) in membrane. These membranes were characterized by using Fourier transform infrared spectroscopy (FTIR), thermogravimetry (TG) and scanning electron microscopy (SEM). The adsorption kinetics were investigated using three different concentrations of Bezactiv Orange dye (30, 50 and 80 mg/L). The adsorption capacity increases with increasing amount of MMT in membranes. These membranes show the highest adsorption capacity when the initial dye concentration was 80 mg/L The results show that the optimum condition for adsorption of Bezactiv Orange is pH 6. A comparison of kinetic models was evaluated for the pseudo-first and pseudo-second order and intra-particle diffusion. The experimental data were fitted to the pseudo-second order kinetic model, and also followed by intra-particle diffusion. Intra-particle diffusion is not the only rate-controlling step. The Langmuir and Freundlich adsorption isotherms were applied to experimental equilibrium data at different concentration of dye solution. The results indicated the competency of chitosan/MMT membranes adsorbent for Bezactiv Orange adsorption. (C) 2012 Elsevier B.V. All rights reserved.",
journal = "Journal of Hazardous Materials",
title = "Characterization of chitosan/montmorillonite membranes as adsorbents for Bezactiv Orange V-3R dye",
pages = "263-256",
volume = "209",
doi = "10.1016/j.jhazmat.2012.01.020"
}

Nešić, A., Veličković, S. J.,& Antonović, D.. (2012). Characterization of chitosan/montmorillonite membranes as adsorbents for Bezactiv Orange V-3R dye. in Journal of Hazardous Materials, 209, 256-263.
https://doi.org/10.1016/j.jhazmat.2012.01.020

Nešić A, Veličković SJ, Antonović D. Characterization of chitosan/montmorillonite membranes as adsorbents for Bezactiv Orange V-3R dye. in Journal of Hazardous Materials. 2012;209:256-263.
doi:10.1016/j.jhazmat.2012.01.020 .

Nešić, Aleksandra, Veličković, Sava J., Antonović, Dušan, "Characterization of chitosan/montmorillonite membranes as adsorbents for Bezactiv Orange V-3R dye" in Journal of Hazardous Materials, 209 (2012):256-263,
https://doi.org/10.1016/j.jhazmat.2012.01.020 . .

TY  - JOUR
AU  - Nešić, Aleksandra R.
AU  - Trifunović, Snežana
AU  - Grujić, Aleksandar
AU  - Veličković, Sava J.
AU  - Antonovic, Dusan G.
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5630
AB  - Complexes based on amidated pectin (AP) and poly(itaconic acid) (PIA) were prepared by casting films from solutions of AP and PIA in different ratios with the pectin amount ranging from 10% to 90% by mass. The complexes were investigated by elemental analysis, Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermogravimetry (TG). In all investigated ratios of AP/PIA glassy transparent films with a uniform structure were obtained. The results of elemental analysis confirmed the composition of the complexes, and FTIR spectroscopy has shown carboxylic and amide peak shifting, indicating complex formation between AP and PIA. Comparison of thermograms of AP/PIA films with different ratios of AP indicated that the increase of the amount of AP increases the thermal stability of the films by retarding the onset of the main degradation processes.
PB  - Elsevier Sci Ltd, Oxford
T2  - Carbohydrate Research
T1  - Complexation of amidated pectin with poly(itaconic acid) as a polycarboxylic polymer model compound
EP  - 2468
IS  - 15
SP  - 2463
VL  - 346
DO  - 10.1016/j.carres.2011.08.021
ER  - 

@article{
author = "Nešić, Aleksandra R. and Trifunović, Snežana and Grujić, Aleksandar and Veličković, Sava J. and Antonovic, Dusan G.",
year = "2011",
abstract = "Complexes based on amidated pectin (AP) and poly(itaconic acid) (PIA) were prepared by casting films from solutions of AP and PIA in different ratios with the pectin amount ranging from 10% to 90% by mass. The complexes were investigated by elemental analysis, Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermogravimetry (TG). In all investigated ratios of AP/PIA glassy transparent films with a uniform structure were obtained. The results of elemental analysis confirmed the composition of the complexes, and FTIR spectroscopy has shown carboxylic and amide peak shifting, indicating complex formation between AP and PIA. Comparison of thermograms of AP/PIA films with different ratios of AP indicated that the increase of the amount of AP increases the thermal stability of the films by retarding the onset of the main degradation processes.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Carbohydrate Research",
title = "Complexation of amidated pectin with poly(itaconic acid) as a polycarboxylic polymer model compound",
pages = "2468-2463",
number = "15",
volume = "346",
doi = "10.1016/j.carres.2011.08.021"
}

Nešić, A. R., Trifunović, S., Grujić, A., Veličković, S. J.,& Antonovic, D. G.. (2011). Complexation of amidated pectin with poly(itaconic acid) as a polycarboxylic polymer model compound. in Carbohydrate Research
Elsevier Sci Ltd, Oxford., 346(15), 2463-2468.
https://doi.org/10.1016/j.carres.2011.08.021

Nešić AR, Trifunović S, Grujić A, Veličković SJ, Antonovic DG. Complexation of amidated pectin with poly(itaconic acid) as a polycarboxylic polymer model compound. in Carbohydrate Research. 2011;346(15):2463-2468.
doi:10.1016/j.carres.2011.08.021 .

Nešić, Aleksandra R., Trifunović, Snežana, Grujić, Aleksandar, Veličković, Sava J., Antonovic, Dusan G., "Complexation of amidated pectin with poly(itaconic acid) as a polycarboxylic polymer model compound" in Carbohydrate Research, 346, no. 15 (2011):2463-2468,
https://doi.org/10.1016/j.carres.2011.08.021 . .