TY  - JOUR
AU  - Purić, Milos
AU  - Rabrenović, Biljana
AU  - Rac, Vladislav
AU  - Pezo, Lato
AU  - Tomašević, Igor
AU  - Demin, Mirjana
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5276
AB  - This paper examined the effect of adding the ground defatted apple seed cakes (DASC) to chemical characteristics, colour, antioxidant potential, the textural and sensory quality of wheat bread. Adding 5% and 20% DASC of three varieties of apples (Golden Delicious, Idared and Sumatovka) to the total amount of wheat flour significantly increased insoluble fibre and protein content in the tested bread samples, primarily in the bread sample supplemented with 20% DASC of Sumatovka (7.21% and 15.99%, respectively). The highest total polyphenol content and the best antioxidant potential was found in the samples supplemented with 20% DASC. In comparison, the best sensory characteristics and textural properties were found in the samples supplemented with 5% DASC. The bread samples supplemented with 20% Sumatovka had the highest content of insoluble fibre, proteins, total polyphenol content, antioxidant potential and the lowest change in freshness, while the bread samples supplemented with 5% Golden Delicious had the highest content of soluble fibre, brightness and chewiness. Finally, we obtained enriched bread with proteins and fibre, low energy value, high antioxidant potential, good texture and very acceptable sensory characteristics. The variety of apples and the share of DASC affected the tested characteristics.
PB  - Elsevier, Amsterdam
T2  - LWT-Food Science and Technology
T1  - Application of defatted apple seed cakes as a by-product for the enrichment of wheat bread
VL  - 130
DO  - 10.1016/j.lwt.2020.109391
ER  - 

@article{
author = "Purić, Milos and Rabrenović, Biljana and Rac, Vladislav and Pezo, Lato and Tomašević, Igor and Demin, Mirjana",
year = "2020",
abstract = "This paper examined the effect of adding the ground defatted apple seed cakes (DASC) to chemical characteristics, colour, antioxidant potential, the textural and sensory quality of wheat bread. Adding 5% and 20% DASC of three varieties of apples (Golden Delicious, Idared and Sumatovka) to the total amount of wheat flour significantly increased insoluble fibre and protein content in the tested bread samples, primarily in the bread sample supplemented with 20% DASC of Sumatovka (7.21% and 15.99%, respectively). The highest total polyphenol content and the best antioxidant potential was found in the samples supplemented with 20% DASC. In comparison, the best sensory characteristics and textural properties were found in the samples supplemented with 5% DASC. The bread samples supplemented with 20% Sumatovka had the highest content of insoluble fibre, proteins, total polyphenol content, antioxidant potential and the lowest change in freshness, while the bread samples supplemented with 5% Golden Delicious had the highest content of soluble fibre, brightness and chewiness. Finally, we obtained enriched bread with proteins and fibre, low energy value, high antioxidant potential, good texture and very acceptable sensory characteristics. The variety of apples and the share of DASC affected the tested characteristics.",
publisher = "Elsevier, Amsterdam",
journal = "LWT-Food Science and Technology",
title = "Application of defatted apple seed cakes as a by-product for the enrichment of wheat bread",
volume = "130",
doi = "10.1016/j.lwt.2020.109391"
}

Purić, M., Rabrenović, B., Rac, V., Pezo, L., Tomašević, I.,& Demin, M.. (2020). Application of defatted apple seed cakes as a by-product for the enrichment of wheat bread. in LWT-Food Science and Technology
Elsevier, Amsterdam., 130.
https://doi.org/10.1016/j.lwt.2020.109391

Purić M, Rabrenović B, Rac V, Pezo L, Tomašević I, Demin M. Application of defatted apple seed cakes as a by-product for the enrichment of wheat bread. in LWT-Food Science and Technology. 2020;130.
doi:10.1016/j.lwt.2020.109391 .

Purić, Milos, Rabrenović, Biljana, Rac, Vladislav, Pezo, Lato, Tomašević, Igor, Demin, Mirjana, "Application of defatted apple seed cakes as a by-product for the enrichment of wheat bread" in LWT-Food Science and Technology, 130 (2020),
https://doi.org/10.1016/j.lwt.2020.109391 . .

TY  - JOUR
AU  - Rac, Vladislav
AU  - Rakić, Vesna
AU  - Stošić, Dušan
AU  - Pavlović, Vladimir
AU  - Bosnar, Sanja
AU  - Auroux, Aline
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5365
AB  - The possibility of removal of pharmaceutically active substances, atenolol, diclofenac sodium and salicylic acid, from water solutions using hierarchical form of zeolite ZSM-5 is investigated in this paper. Mesopore formation in ZSM-5 was achieved using alkaline treatment. Zeolitic samples were characterized by X-ray diffraction, low temperature nitrogen adsorption, solid-state 27A1 MAS NMR, point of zero charge determination and microcalorimetry - volumetry of ammonia adsorption. Adsorption isotherms of pharmaceutically active substances were obtained and liquid calorimetric experiments were used to evaluate the strength of interactions. The capacity for salicylic acid adsorption measured for the mesoporous sample did not significantly differ from the results obtained for the parent ZSM-5. However, in the case of atenolol and diclofenac sodium, mesoporous ZSM-5 exhibited increased adsorption capacities. Calorimetric data revealed higher heats of atenolol adsorption on mesoporous ZSM-5, compared to the parent. Based on similar acidity and surface charge determined for the two samples, our results show that geometry and dimensions of both zeolite pores and adsorbing molecules play a crucial role in the studied adsorption processes and that tailoring ZSM-5 porosity by desilication can be used to expand its applicability in depollution processes.
PB  - Elsevier, Amsterdam
T2  - Arabian Journal of Chemistry
T1  - Enhanced accessibility of active sites in hierarchical ZSM-5 zeolite for removal of pharmaceutically active substances: Adsorption and microcalorimetric study
EP  - 1954
IS  - 1
SP  - 1945
VL  - 13
DO  - 10.1016/j.arabjc.2018.02.012
ER  - 

@article{
author = "Rac, Vladislav and Rakić, Vesna and Stošić, Dušan and Pavlović, Vladimir and Bosnar, Sanja and Auroux, Aline",
year = "2020",
abstract = "The possibility of removal of pharmaceutically active substances, atenolol, diclofenac sodium and salicylic acid, from water solutions using hierarchical form of zeolite ZSM-5 is investigated in this paper. Mesopore formation in ZSM-5 was achieved using alkaline treatment. Zeolitic samples were characterized by X-ray diffraction, low temperature nitrogen adsorption, solid-state 27A1 MAS NMR, point of zero charge determination and microcalorimetry - volumetry of ammonia adsorption. Adsorption isotherms of pharmaceutically active substances were obtained and liquid calorimetric experiments were used to evaluate the strength of interactions. The capacity for salicylic acid adsorption measured for the mesoporous sample did not significantly differ from the results obtained for the parent ZSM-5. However, in the case of atenolol and diclofenac sodium, mesoporous ZSM-5 exhibited increased adsorption capacities. Calorimetric data revealed higher heats of atenolol adsorption on mesoporous ZSM-5, compared to the parent. Based on similar acidity and surface charge determined for the two samples, our results show that geometry and dimensions of both zeolite pores and adsorbing molecules play a crucial role in the studied adsorption processes and that tailoring ZSM-5 porosity by desilication can be used to expand its applicability in depollution processes.",
publisher = "Elsevier, Amsterdam",
journal = "Arabian Journal of Chemistry",
title = "Enhanced accessibility of active sites in hierarchical ZSM-5 zeolite for removal of pharmaceutically active substances: Adsorption and microcalorimetric study",
pages = "1954-1945",
number = "1",
volume = "13",
doi = "10.1016/j.arabjc.2018.02.012"
}

Rac, V., Rakić, V., Stošić, D., Pavlović, V., Bosnar, S.,& Auroux, A.. (2020). Enhanced accessibility of active sites in hierarchical ZSM-5 zeolite for removal of pharmaceutically active substances: Adsorption and microcalorimetric study. in Arabian Journal of Chemistry
Elsevier, Amsterdam., 13(1), 1945-1954.
https://doi.org/10.1016/j.arabjc.2018.02.012

Rac V, Rakić V, Stošić D, Pavlović V, Bosnar S, Auroux A. Enhanced accessibility of active sites in hierarchical ZSM-5 zeolite for removal of pharmaceutically active substances: Adsorption and microcalorimetric study. in Arabian Journal of Chemistry. 2020;13(1):1945-1954.
doi:10.1016/j.arabjc.2018.02.012 .

Rac, Vladislav, Rakić, Vesna, Stošić, Dušan, Pavlović, Vladimir, Bosnar, Sanja, Auroux, Aline, "Enhanced accessibility of active sites in hierarchical ZSM-5 zeolite for removal of pharmaceutically active substances: Adsorption and microcalorimetric study" in Arabian Journal of Chemistry, 13, no. 1 (2020):1945-1954,
https://doi.org/10.1016/j.arabjc.2018.02.012 . .

TY  - JOUR
AU  - Rac, Vladislav
AU  - Rakić, Vesna
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5475
AB  - The work presented in this paper was dedicated to the investigation of the influence of the alkaline treatment parameters on the formation of mesopores in zeolite ZSM-5, SiO2/Al2O3=50. Concentration of NaOH, temperature and tretment duration were varied. The obtained samples were characterized using low temperature nitrogen adsorption, X ray diffraction and solid state 27Al MAS NMR spectroscopy. Formation of mesopores was found to be a process sensitive to changes of treatment parameters, which can lead to creation of hierarchical zeolites with different mesopore surfaces and distributions of pore size diameters. Also, treatment duration was found to have a lesser influence on the process, compared to other two investigated parameters. Mesopore introduction resulted in partial crystallinity reduction, in all modified samples. No significant buildup of extraframework Al was detected.
AB  - U ovom radu prikazani su rezultati ispitivanja uticaja parametara alkalnog tretmana na formiranje mezopora u zeolitu ZSM-5, SiO2/Al2O3=50. Varirane su koncentracija natrijum hidroksida, temperatura i trajanje tratmana. Uzorci dobijenih hijerarhijskih formi zeolita ZSM-5 okarakterisani su metodama niskotemperaturske adsorpcije azota, rendgenskom difrakcionom analizom i 27Al MAS NMR sprektroskopijom čvrstog stanja. Utvrđeno je da je formiranje mezopora u zeolitu ZSM-5 proces osetljiv na promene ispitivanih parametara i da je moguće kreiranje hijerarhijskih ZSM-5 zeolita sa različitim veličinama mezoporoznih površina i raspodelama dijametara pora. Takođe, utvrđeno je da koncentracija NaOH i temperatura tretmana imaju značajniji uticaj na formiranje mezoporoznosti od trajanja tretmana. Dobijeni rezultati pokazuju da je formiranje mezopora ovim postupkom praćeno delimičnim smanjenjem kristaliniteta uzoraka zeolita. Na osnovu 27Al MAS NMR sprektroskopije zaključeno je da tretman nije doprineo stvaranju značajnih količina vanmrežnog aluminijuma.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Mesopore creation in zeolite ZSM-5: Influence of NaOH concentration, temperature and treatment duration
T1  - Kreiranje mezopora u zeolitu ZSM-5 alkalnim tretmanom - uticaj koncentracije NaOH, temperature i trajanja tretmana
EP  - 14
IS  - 1
SP  - 9
VL  - 75
DO  - 10.5937/tehnika2001009R
ER  - 

@article{
author = "Rac, Vladislav and Rakić, Vesna",
year = "2020",
abstract = "The work presented in this paper was dedicated to the investigation of the influence of the alkaline treatment parameters on the formation of mesopores in zeolite ZSM-5, SiO2/Al2O3=50. Concentration of NaOH, temperature and tretment duration were varied. The obtained samples were characterized using low temperature nitrogen adsorption, X ray diffraction and solid state 27Al MAS NMR spectroscopy. Formation of mesopores was found to be a process sensitive to changes of treatment parameters, which can lead to creation of hierarchical zeolites with different mesopore surfaces and distributions of pore size diameters. Also, treatment duration was found to have a lesser influence on the process, compared to other two investigated parameters. Mesopore introduction resulted in partial crystallinity reduction, in all modified samples. No significant buildup of extraframework Al was detected., U ovom radu prikazani su rezultati ispitivanja uticaja parametara alkalnog tretmana na formiranje mezopora u zeolitu ZSM-5, SiO2/Al2O3=50. Varirane su koncentracija natrijum hidroksida, temperatura i trajanje tratmana. Uzorci dobijenih hijerarhijskih formi zeolita ZSM-5 okarakterisani su metodama niskotemperaturske adsorpcije azota, rendgenskom difrakcionom analizom i 27Al MAS NMR sprektroskopijom čvrstog stanja. Utvrđeno je da je formiranje mezopora u zeolitu ZSM-5 proces osetljiv na promene ispitivanih parametara i da je moguće kreiranje hijerarhijskih ZSM-5 zeolita sa različitim veličinama mezoporoznih površina i raspodelama dijametara pora. Takođe, utvrđeno je da koncentracija NaOH i temperatura tretmana imaju značajniji uticaj na formiranje mezoporoznosti od trajanja tretmana. Dobijeni rezultati pokazuju da je formiranje mezopora ovim postupkom praćeno delimičnim smanjenjem kristaliniteta uzoraka zeolita. Na osnovu 27Al MAS NMR sprektroskopije zaključeno je da tretman nije doprineo stvaranju značajnih količina vanmrežnog aluminijuma.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Mesopore creation in zeolite ZSM-5: Influence of NaOH concentration, temperature and treatment duration, Kreiranje mezopora u zeolitu ZSM-5 alkalnim tretmanom - uticaj koncentracije NaOH, temperature i trajanja tretmana",
pages = "14-9",
number = "1",
volume = "75",
doi = "10.5937/tehnika2001009R"
}

Rac, V.,& Rakić, V.. (2020). Mesopore creation in zeolite ZSM-5: Influence of NaOH concentration, temperature and treatment duration. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 75(1), 9-14.
https://doi.org/10.5937/tehnika2001009R

Rac V, Rakić V. Mesopore creation in zeolite ZSM-5: Influence of NaOH concentration, temperature and treatment duration. in Tehnika. 2020;75(1):9-14.
doi:10.5937/tehnika2001009R .

Rac, Vladislav, Rakić, Vesna, "Mesopore creation in zeolite ZSM-5: Influence of NaOH concentration, temperature and treatment duration" in Tehnika, 75, no. 1 (2020):9-14,
https://doi.org/10.5937/tehnika2001009R . .

TY  - JOUR
AU  - Rac, Vladislav
AU  - Lević, Steva
AU  - Balanc, Bojana
AU  - Graells, Beatriz Olalde
AU  - Bijelić, Goran
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4932
AB  - The use of polyvinyl alcohol (PVA) cryogel as a model hydrogel for iontophoretic transdermal investigations is proposed. Due to the excellent combination of its properties, it could be used for evaluating iontophoretic transdermal delivery of variety of drugs, regardless of pK(a), pH or presence of auxiliary ions. Applicability of PVA Cryogel for drug delivery purposes was compared to those of polyacrylic acid/polyvinyl alcohol (PAA/PVA) and polyacrylic acid/polyvinylpyrrolidone (PAA/PVP) adhesive interpenetrating networks. Swelling properties of PVA Cryogel were shown to be almost independent on pH and NaCl concentration, while swelling of PAA-based gels was significantly affected. Addition of PVA and PVP to PAA decreased swelling degrees and increased adhesivity and compression moduli. Iontophoretic experiments were performed using a donor gel/skin/receptor gel configuration; current density and delivery duration were varied. Dexamethasone sodium phosphate was used as model drug molecule. PVA Cryogel was used for investigating the influence of NaCl concentration, which can alter the amount of current carried by the drug ions and, therefore, the delivery rate. By using PVA Cryogel it was possible to easily determine the amount of drug permeated through the skin into the receptor gel, the amount retained by the skin and the amount remained in the donor hydrogel. Decreasing NaCl concentration in PVA Cryogel resulted in higher total amounts of drug delivered and significantly enhanced drug permeation through the lower layers of the skin into the receptor hydrogel.
PB  - Elsevier, Amsterdam
T2  - Colloids and Surfaces B-Biointerfaces
T1  - PVA Cryogel as model hydrogel for iontophoretic transdermal drug delivery investigations. Comparison with PAA/PVA and PAA/PVP interpenetrating networks
EP  - 448
SP  - 441
VL  - 180
DO  - 10.1016/j.colsurfb.2019.05.017
ER  - 

@article{
author = "Rac, Vladislav and Lević, Steva and Balanc, Bojana and Graells, Beatriz Olalde and Bijelić, Goran",
year = "2019",
abstract = "The use of polyvinyl alcohol (PVA) cryogel as a model hydrogel for iontophoretic transdermal investigations is proposed. Due to the excellent combination of its properties, it could be used for evaluating iontophoretic transdermal delivery of variety of drugs, regardless of pK(a), pH or presence of auxiliary ions. Applicability of PVA Cryogel for drug delivery purposes was compared to those of polyacrylic acid/polyvinyl alcohol (PAA/PVA) and polyacrylic acid/polyvinylpyrrolidone (PAA/PVP) adhesive interpenetrating networks. Swelling properties of PVA Cryogel were shown to be almost independent on pH and NaCl concentration, while swelling of PAA-based gels was significantly affected. Addition of PVA and PVP to PAA decreased swelling degrees and increased adhesivity and compression moduli. Iontophoretic experiments were performed using a donor gel/skin/receptor gel configuration; current density and delivery duration were varied. Dexamethasone sodium phosphate was used as model drug molecule. PVA Cryogel was used for investigating the influence of NaCl concentration, which can alter the amount of current carried by the drug ions and, therefore, the delivery rate. By using PVA Cryogel it was possible to easily determine the amount of drug permeated through the skin into the receptor gel, the amount retained by the skin and the amount remained in the donor hydrogel. Decreasing NaCl concentration in PVA Cryogel resulted in higher total amounts of drug delivered and significantly enhanced drug permeation through the lower layers of the skin into the receptor hydrogel.",
publisher = "Elsevier, Amsterdam",
journal = "Colloids and Surfaces B-Biointerfaces",
title = "PVA Cryogel as model hydrogel for iontophoretic transdermal drug delivery investigations. Comparison with PAA/PVA and PAA/PVP interpenetrating networks",
pages = "448-441",
volume = "180",
doi = "10.1016/j.colsurfb.2019.05.017"
}

Rac, V., Lević, S., Balanc, B., Graells, B. O.,& Bijelić, G.. (2019). PVA Cryogel as model hydrogel for iontophoretic transdermal drug delivery investigations. Comparison with PAA/PVA and PAA/PVP interpenetrating networks. in Colloids and Surfaces B-Biointerfaces
Elsevier, Amsterdam., 180, 441-448.
https://doi.org/10.1016/j.colsurfb.2019.05.017

Rac V, Lević S, Balanc B, Graells BO, Bijelić G. PVA Cryogel as model hydrogel for iontophoretic transdermal drug delivery investigations. Comparison with PAA/PVA and PAA/PVP interpenetrating networks. in Colloids and Surfaces B-Biointerfaces. 2019;180:441-448.
doi:10.1016/j.colsurfb.2019.05.017 .

Rac, Vladislav, Lević, Steva, Balanc, Bojana, Graells, Beatriz Olalde, Bijelić, Goran, "PVA Cryogel as model hydrogel for iontophoretic transdermal drug delivery investigations. Comparison with PAA/PVA and PAA/PVP interpenetrating networks" in Colloids and Surfaces B-Biointerfaces, 180 (2019):441-448,
https://doi.org/10.1016/j.colsurfb.2019.05.017 . .

TY  - JOUR
AU  - Poleksić, Dajana T.
AU  - Pavlićević, Milica Ž.
AU  - Raković-Simić, Jelena M.
AU  - Rac, Vladislav
AU  - Vučelić-Radović, Biljana
AU  - Rakić, Vesna
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4777
AB  - Two different ways of extracting antioxidative compounds (including soluble polyphenols) from rusks made from wheat flour with added millet (Panicum miliaceum L.) were compared, i.e., solvent extraction and in vitro digestion. Wheat flour was replaced by millet flour in amounts of 10, 20 or 30 wt. % (per dry mass). Solvent extraction was realized using a mixture of ethanol and water in different percentages, with or without the addition of formic acid. The total content of phenolic compounds (TPC) was determined using Folin-Ciocalteu reagent, while the antioxidative capacity was measured by the DPPH (2,2-diphenyl-1-picrylhydrazyl) assay. The efficiency of solvent extraction was enhanced by the addition of formic acid. The addition of millet flour in amounts up to 20 % enhanced the antioxidative properties. It was shown that in vitro digestion was more efficient in the extraction of antioxidative compounds, in comparison with solvent extraction.
PB  - Srpsko hemijsko društvo, Beograd
T2  - JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
T1  - The extraction of antioxidative compounds from rusks enriched with millet flour (Panicum miliaceum L.)
EP  - 732
IS  - 6
SP  - 723
VL  - 83
DO  - 10.2298/JSC171229028P
ER  - 

@article{
author = "Poleksić, Dajana T. and Pavlićević, Milica Ž. and Raković-Simić, Jelena M. and Rac, Vladislav and Vučelić-Radović, Biljana and Rakić, Vesna",
year = "2018",
abstract = "Two different ways of extracting antioxidative compounds (including soluble polyphenols) from rusks made from wheat flour with added millet (Panicum miliaceum L.) were compared, i.e., solvent extraction and in vitro digestion. Wheat flour was replaced by millet flour in amounts of 10, 20 or 30 wt. % (per dry mass). Solvent extraction was realized using a mixture of ethanol and water in different percentages, with or without the addition of formic acid. The total content of phenolic compounds (TPC) was determined using Folin-Ciocalteu reagent, while the antioxidative capacity was measured by the DPPH (2,2-diphenyl-1-picrylhydrazyl) assay. The efficiency of solvent extraction was enhanced by the addition of formic acid. The addition of millet flour in amounts up to 20 % enhanced the antioxidative properties. It was shown that in vitro digestion was more efficient in the extraction of antioxidative compounds, in comparison with solvent extraction.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "JOURNAL OF THE SERBIAN CHEMICAL SOCIETY",
title = "The extraction of antioxidative compounds from rusks enriched with millet flour (Panicum miliaceum L.)",
pages = "732-723",
number = "6",
volume = "83",
doi = "10.2298/JSC171229028P"
}

Poleksić, D. T., Pavlićević, M. Ž., Raković-Simić, J. M., Rac, V., Vučelić-Radović, B.,& Rakić, V.. (2018). The extraction of antioxidative compounds from rusks enriched with millet flour (Panicum miliaceum L.). in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
Srpsko hemijsko društvo, Beograd., 83(6), 723-732.
https://doi.org/10.2298/JSC171229028P

Poleksić DT, Pavlićević MŽ, Raković-Simić JM, Rac V, Vučelić-Radović B, Rakić V. The extraction of antioxidative compounds from rusks enriched with millet flour (Panicum miliaceum L.). in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY. 2018;83(6):723-732.
doi:10.2298/JSC171229028P .

Poleksić, Dajana T., Pavlićević, Milica Ž., Raković-Simić, Jelena M., Rac, Vladislav, Vučelić-Radović, Biljana, Rakić, Vesna, "The extraction of antioxidative compounds from rusks enriched with millet flour (Panicum miliaceum L.)" in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 83, no. 6 (2018):723-732,
https://doi.org/10.2298/JSC171229028P . .

TY  - JOUR
AU  - Milojević-Rakić, M.
AU  - Dondur, Vera
AU  - Damjanović-Vasilić, Ljiljana
AU  - Rac, Vladislav
AU  - Rakić, Vesna
PY  - 2018
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4737
AB  - The competitive adsorption of aromatic hydrocarbons (benzene, methyl- and ethyl-benzene) and water on FeZSM-5 zeolites have been investigated by means of temperature-programmed desorption coupled with mass spectrometry (TPD/MS). The incorporation of iron in zeolite was done by aqueous ion exchange using dilute solutions of Fe complexes (ferric citrate and ferrous oxalate) and ferric nitrate. Diffuse reflectance UV-Vis spectroscopy and temperature-programmed reduction (TPR) were applied to characterize active sites on investigated zeolites. The existence of different iron species on FeZSM-5 zeolites was revealed. It has been demonstrated that the activity of the Fe exchanged zeolite depends on the iron salt used for ion exchange. The isolated, dispersed ions, which are often considered to be essential for adsorption and catalysis, were obtained with high yield only by ion exchange in the presence of ferrous oxalate. TPD/MS measurements show that aromatic hydrocarbons adsorb on specific, strong active sites in hydrated zeolites. The binding occurred when organic molecules replace water previously adsorbed at the same sites. Benzene showed non-dissociative adsorption/desorption, while new mass fragments were recorded during methyl-benzene and ethyl-benzene desorption implying their dissociative adsorption/desorption on active sites in hydrated zeolites.
PB  - Springer, Dordrecht
T2  - Reaction Kinetics Mechanisms and Catalysis
T1  - The accessibility of sites active in the dissociative adsorption of aromatic hydrocarbons in FeZSM-5 zeolite
EP  - 246
IS  - 1
SP  - 231
VL  - 123
DO  - 10.1007/s11144-017-1275-y
ER  - 

@article{
author = "Milojević-Rakić, M. and Dondur, Vera and Damjanović-Vasilić, Ljiljana and Rac, Vladislav and Rakić, Vesna",
year = "2018",
abstract = "The competitive adsorption of aromatic hydrocarbons (benzene, methyl- and ethyl-benzene) and water on FeZSM-5 zeolites have been investigated by means of temperature-programmed desorption coupled with mass spectrometry (TPD/MS). The incorporation of iron in zeolite was done by aqueous ion exchange using dilute solutions of Fe complexes (ferric citrate and ferrous oxalate) and ferric nitrate. Diffuse reflectance UV-Vis spectroscopy and temperature-programmed reduction (TPR) were applied to characterize active sites on investigated zeolites. The existence of different iron species on FeZSM-5 zeolites was revealed. It has been demonstrated that the activity of the Fe exchanged zeolite depends on the iron salt used for ion exchange. The isolated, dispersed ions, which are often considered to be essential for adsorption and catalysis, were obtained with high yield only by ion exchange in the presence of ferrous oxalate. TPD/MS measurements show that aromatic hydrocarbons adsorb on specific, strong active sites in hydrated zeolites. The binding occurred when organic molecules replace water previously adsorbed at the same sites. Benzene showed non-dissociative adsorption/desorption, while new mass fragments were recorded during methyl-benzene and ethyl-benzene desorption implying their dissociative adsorption/desorption on active sites in hydrated zeolites.",
publisher = "Springer, Dordrecht",
journal = "Reaction Kinetics Mechanisms and Catalysis",
title = "The accessibility of sites active in the dissociative adsorption of aromatic hydrocarbons in FeZSM-5 zeolite",
pages = "246-231",
number = "1",
volume = "123",
doi = "10.1007/s11144-017-1275-y"
}

Milojević-Rakić, M., Dondur, V., Damjanović-Vasilić, L., Rac, V.,& Rakić, V.. (2018). The accessibility of sites active in the dissociative adsorption of aromatic hydrocarbons in FeZSM-5 zeolite. in Reaction Kinetics Mechanisms and Catalysis
Springer, Dordrecht., 123(1), 231-246.
https://doi.org/10.1007/s11144-017-1275-y

Milojević-Rakić M, Dondur V, Damjanović-Vasilić L, Rac V, Rakić V. The accessibility of sites active in the dissociative adsorption of aromatic hydrocarbons in FeZSM-5 zeolite. in Reaction Kinetics Mechanisms and Catalysis. 2018;123(1):231-246.
doi:10.1007/s11144-017-1275-y .

Milojević-Rakić, M., Dondur, Vera, Damjanović-Vasilić, Ljiljana, Rac, Vladislav, Rakić, Vesna, "The accessibility of sites active in the dissociative adsorption of aromatic hydrocarbons in FeZSM-5 zeolite" in Reaction Kinetics Mechanisms and Catalysis, 123, no. 1 (2018):231-246,
https://doi.org/10.1007/s11144-017-1275-y . .

TY  - JOUR
AU  - Milenković, Jelena
AU  - Hrenović, Jasna
AU  - Matijasević, Danka
AU  - Nikšić, Miomir
AU  - Rajić, Nevenka
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4455
AB  - Two types of zeolites-natural clinoptilolite (NZ) and synthetic zeolite A (A)-were enriched with approx. 0.25 mmol of Cu(II), Zn(II), or Ag(I) ions, and the obtained materials (M-Z) were tested against three different isolates of Escherichia coli. Two isolates were environmental isolates from waters in Serbia whereas the third one was DSM 498. Antibacterial activity was studied in different water media-nutrient-rich media (peptone water), water from Sava Lake, and commercially available spring water. The Ag-containing zeolites showed bactericidal activity in the nutrient-rich peptone water after 1 h of contact. Cu- and Zn-containing zeolites showed bactericidal activity in real water samples. Antibacterial activity of the M-Z decreases in all three examined water media in the following order: Ag-NZ ae Ag-A > Cu-NZ ae Cu-A > Zn-NZ >>> Zn-A, suggesting that mainly the metal type and not the zeolite type have a role in the antibacterial activity. Leaching experiments showed small amounts of the leached Cu(II) and Zn(II) ions, indicating that the antibacterial activity is not due to the metal ions but should be attributed to the M-Z itself. However, leached amounts of Ag(I) from Ag-NZ and Ag-A in peptone water indicate that the released Ag(I) could be mainly responsible for the bactericidal effect of the Ag(I)-containing zeolites. Since no loss of cellular material was found, the antibacterial activity is not attributed to cytoplasmic membrane damage.
PB  - Springer Heidelberg, Heidelberg
T2  - Environmental Science and Pollution Research
T1  - Bactericidal activity of Cu-, Zn-, and Ag-containing zeolites toward Escherichia coli isolates
EP  - 20281
IS  - 25
SP  - 20273
VL  - 24
DO  - 10.1007/s11356-017-9643-8
ER  - 

@article{
author = "Milenković, Jelena and Hrenović, Jasna and Matijasević, Danka and Nikšić, Miomir and Rajić, Nevenka",
year = "2017",
abstract = "Two types of zeolites-natural clinoptilolite (NZ) and synthetic zeolite A (A)-were enriched with approx. 0.25 mmol of Cu(II), Zn(II), or Ag(I) ions, and the obtained materials (M-Z) were tested against three different isolates of Escherichia coli. Two isolates were environmental isolates from waters in Serbia whereas the third one was DSM 498. Antibacterial activity was studied in different water media-nutrient-rich media (peptone water), water from Sava Lake, and commercially available spring water. The Ag-containing zeolites showed bactericidal activity in the nutrient-rich peptone water after 1 h of contact. Cu- and Zn-containing zeolites showed bactericidal activity in real water samples. Antibacterial activity of the M-Z decreases in all three examined water media in the following order: Ag-NZ ae Ag-A > Cu-NZ ae Cu-A > Zn-NZ >>> Zn-A, suggesting that mainly the metal type and not the zeolite type have a role in the antibacterial activity. Leaching experiments showed small amounts of the leached Cu(II) and Zn(II) ions, indicating that the antibacterial activity is not due to the metal ions but should be attributed to the M-Z itself. However, leached amounts of Ag(I) from Ag-NZ and Ag-A in peptone water indicate that the released Ag(I) could be mainly responsible for the bactericidal effect of the Ag(I)-containing zeolites. Since no loss of cellular material was found, the antibacterial activity is not attributed to cytoplasmic membrane damage.",
publisher = "Springer Heidelberg, Heidelberg",
journal = "Environmental Science and Pollution Research",
title = "Bactericidal activity of Cu-, Zn-, and Ag-containing zeolites toward Escherichia coli isolates",
pages = "20281-20273",
number = "25",
volume = "24",
doi = "10.1007/s11356-017-9643-8"
}

Milenković, J., Hrenović, J., Matijasević, D., Nikšić, M.,& Rajić, N.. (2017). Bactericidal activity of Cu-, Zn-, and Ag-containing zeolites toward Escherichia coli isolates. in Environmental Science and Pollution Research
Springer Heidelberg, Heidelberg., 24(25), 20273-20281.
https://doi.org/10.1007/s11356-017-9643-8

Milenković J, Hrenović J, Matijasević D, Nikšić M, Rajić N. Bactericidal activity of Cu-, Zn-, and Ag-containing zeolites toward Escherichia coli isolates. in Environmental Science and Pollution Research. 2017;24(25):20273-20281.
doi:10.1007/s11356-017-9643-8 .

Milenković, Jelena, Hrenović, Jasna, Matijasević, Danka, Nikšić, Miomir, Rajić, Nevenka, "Bactericidal activity of Cu-, Zn-, and Ag-containing zeolites toward Escherichia coli isolates" in Environmental Science and Pollution Research, 24, no. 25 (2017):20273-20281,
https://doi.org/10.1007/s11356-017-9643-8 . .

TY  - JOUR
AU  - Rac, Vladislav
AU  - Rakić, Vesna
AU  - Damjanović-Vasilić, Ljiljana
AU  - Dondur, Vera
AU  - Auroux, Aline
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4487
AB  - Room temperature adsorption of CO and N2O using isothermal calorimetry and in situ FTIR spectroscopy on bimetallic and monometallic forms of Cu, Fe and Mn exchanged zeolite ZSM-5 was studied. The two complementary techniques allowed the assessment of the strengths of interactions as well as the identification of the cations active in adsorption. In bimetallic samples containing Cu, a synergistic effect was observed for CO adsorption, i.e higher strengths of adsorption were detected than for corresponding monometallic samples. Such an effect was not detected for N2O. Furthermore, FTIR measurements revealed that N2O adsorption was somewhat restricted for the cation which was introduced the first in bimetallic samples. These findings imply the importance of the order of cation introduction and the procedure of ion exchange process for the adsorptive properties of bimetallic ZSM-5 and, consequently, catalytic reactions where adsorption of N2O is an important reaction step.
PB  - Elsevier, Amsterdam
T2  - Applied Surface Science
T1  - Complementary approach to the adsorption of CO and N2O on bimetallic ion exchanged ZMS-5 zeolite: Microcalorimetric and FTIR spectroscopy study
EP  - 1140
SP  - 1134
VL  - 423
DO  - 10.1016/j.apsusc.2017.06.269
ER  - 

@article{
author = "Rac, Vladislav and Rakić, Vesna and Damjanović-Vasilić, Ljiljana and Dondur, Vera and Auroux, Aline",
year = "2017",
abstract = "Room temperature adsorption of CO and N2O using isothermal calorimetry and in situ FTIR spectroscopy on bimetallic and monometallic forms of Cu, Fe and Mn exchanged zeolite ZSM-5 was studied. The two complementary techniques allowed the assessment of the strengths of interactions as well as the identification of the cations active in adsorption. In bimetallic samples containing Cu, a synergistic effect was observed for CO adsorption, i.e higher strengths of adsorption were detected than for corresponding monometallic samples. Such an effect was not detected for N2O. Furthermore, FTIR measurements revealed that N2O adsorption was somewhat restricted for the cation which was introduced the first in bimetallic samples. These findings imply the importance of the order of cation introduction and the procedure of ion exchange process for the adsorptive properties of bimetallic ZSM-5 and, consequently, catalytic reactions where adsorption of N2O is an important reaction step.",
publisher = "Elsevier, Amsterdam",
journal = "Applied Surface Science",
title = "Complementary approach to the adsorption of CO and N2O on bimetallic ion exchanged ZMS-5 zeolite: Microcalorimetric and FTIR spectroscopy study",
pages = "1140-1134",
volume = "423",
doi = "10.1016/j.apsusc.2017.06.269"
}

Rac, V., Rakić, V., Damjanović-Vasilić, L., Dondur, V.,& Auroux, A.. (2017). Complementary approach to the adsorption of CO and N2O on bimetallic ion exchanged ZMS-5 zeolite: Microcalorimetric and FTIR spectroscopy study. in Applied Surface Science
Elsevier, Amsterdam., 423, 1134-1140.
https://doi.org/10.1016/j.apsusc.2017.06.269

Rac V, Rakić V, Damjanović-Vasilić L, Dondur V, Auroux A. Complementary approach to the adsorption of CO and N2O on bimetallic ion exchanged ZMS-5 zeolite: Microcalorimetric and FTIR spectroscopy study. in Applied Surface Science. 2017;423:1134-1140.
doi:10.1016/j.apsusc.2017.06.269 .

Rac, Vladislav, Rakić, Vesna, Damjanović-Vasilić, Ljiljana, Dondur, Vera, Auroux, Aline, "Complementary approach to the adsorption of CO and N2O on bimetallic ion exchanged ZMS-5 zeolite: Microcalorimetric and FTIR spectroscopy study" in Applied Surface Science, 423 (2017):1134-1140,
https://doi.org/10.1016/j.apsusc.2017.06.269 . .

TY  - JOUR
AU  - Rakić, Vesna
AU  - Rac, Vladislav
AU  - Krmar, Marija
AU  - Otman, Otman
AU  - Auroux, Aline
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3803
AB  - In this study, the adsorption of pharmaceutically active compounds - salicylic acid, acetylsalicylic acid, atenolol and diclofenac-Na onto activated carbons has been studied. Three different commercial activated carbons, possessing similar to 650, 900 or 1500 m(2) g(-1) surface areas were used as solid adsorbents. These materials were fully characterized - their textural, surface features and points of zero charge have been determined. The adsorption was studied from aqueous solutions at 303 K using batch adsorption experiments and titration microcalorimetry, which was employed in order to obtain the heats evolved as a result of adsorption. The maximal adsorption capacities of investigated solids for all target pharmaceuticals are in the range of 10(-4) mol g(-1). The obtained maximal retention capacities are correlated with the textural properties of applied activated carbon. The roles of acid/base features of activated carbons and of molecular structures of adsorbate molecules have been discussed. The obtained results enabled to estimate the possibility to use the activated carbons in the removal of pharmaceuticals by adsorption.
PB  - Elsevier Science Bv, Amsterdam
T2  - Journal of Hazardous Materials
T1  - The adsorption of pharmaceutically active compounds from aqueous solutions onto activated carbons
EP  - 149
SP  - 141
VL  - 282
DO  - 10.1016/j.jhazmat.2014.04.062
ER  - 

@article{
author = "Rakić, Vesna and Rac, Vladislav and Krmar, Marija and Otman, Otman and Auroux, Aline",
year = "2015",
abstract = "In this study, the adsorption of pharmaceutically active compounds - salicylic acid, acetylsalicylic acid, atenolol and diclofenac-Na onto activated carbons has been studied. Three different commercial activated carbons, possessing similar to 650, 900 or 1500 m(2) g(-1) surface areas were used as solid adsorbents. These materials were fully characterized - their textural, surface features and points of zero charge have been determined. The adsorption was studied from aqueous solutions at 303 K using batch adsorption experiments and titration microcalorimetry, which was employed in order to obtain the heats evolved as a result of adsorption. The maximal adsorption capacities of investigated solids for all target pharmaceuticals are in the range of 10(-4) mol g(-1). The obtained maximal retention capacities are correlated with the textural properties of applied activated carbon. The roles of acid/base features of activated carbons and of molecular structures of adsorbate molecules have been discussed. The obtained results enabled to estimate the possibility to use the activated carbons in the removal of pharmaceuticals by adsorption.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of Hazardous Materials",
title = "The adsorption of pharmaceutically active compounds from aqueous solutions onto activated carbons",
pages = "149-141",
volume = "282",
doi = "10.1016/j.jhazmat.2014.04.062"
}

Rakić, V., Rac, V., Krmar, M., Otman, O.,& Auroux, A.. (2015). The adsorption of pharmaceutically active compounds from aqueous solutions onto activated carbons. in Journal of Hazardous Materials
Elsevier Science Bv, Amsterdam., 282, 141-149.
https://doi.org/10.1016/j.jhazmat.2014.04.062

Rakić V, Rac V, Krmar M, Otman O, Auroux A. The adsorption of pharmaceutically active compounds from aqueous solutions onto activated carbons. in Journal of Hazardous Materials. 2015;282:141-149.
doi:10.1016/j.jhazmat.2014.04.062 .

Rakić, Vesna, Rac, Vladislav, Krmar, Marija, Otman, Otman, Auroux, Aline, "The adsorption of pharmaceutically active compounds from aqueous solutions onto activated carbons" in Journal of Hazardous Materials, 282 (2015):141-149,
https://doi.org/10.1016/j.jhazmat.2014.04.062 . .

TY  - JOUR
AU  - Hercigonja, Radmila
AU  - Rakić, Vesna
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3787
AB  - In this work, the values of entropy changes related to n-hexane adsorption onto cation exchanged Y zeolite were calculated from differential heats. Various transition metal cations (Co2+, Ni2+, Zn2+ and Cd2+) were introduced into the lattice of the parent NaY, and the existence of enthalpy-entropy compensation effect related to n-hexane adsorption, id. est, the linearity of -triangle H vs. -triangle S plots was examined. The compensation effect was confirmed for all investigated zeolites. The compensation effect can be comprehended as governed by ion-induced dipole interaction between highly polarizing cationic centers in zeolite and nonopolar n-hexane molecules. Finally, the compensation effect and so the compensation temperature were found to depend on the type of charge-balancing cation (charge, size and electronic configuration).
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Enthalpy-entropy Compensation for n-hexane Adsorption on Y Zeolite Containing Transition Metal Cations
EP  - 88
IS  - 1
SP  - 83
VL  - 47
DO  - 10.2298/SOS1501091H
ER  - 

@article{
author = "Hercigonja, Radmila and Rakić, Vesna",
year = "2015",
abstract = "In this work, the values of entropy changes related to n-hexane adsorption onto cation exchanged Y zeolite were calculated from differential heats. Various transition metal cations (Co2+, Ni2+, Zn2+ and Cd2+) were introduced into the lattice of the parent NaY, and the existence of enthalpy-entropy compensation effect related to n-hexane adsorption, id. est, the linearity of -triangle H vs. -triangle S plots was examined. The compensation effect was confirmed for all investigated zeolites. The compensation effect can be comprehended as governed by ion-induced dipole interaction between highly polarizing cationic centers in zeolite and nonopolar n-hexane molecules. Finally, the compensation effect and so the compensation temperature were found to depend on the type of charge-balancing cation (charge, size and electronic configuration).",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Enthalpy-entropy Compensation for n-hexane Adsorption on Y Zeolite Containing Transition Metal Cations",
pages = "88-83",
number = "1",
volume = "47",
doi = "10.2298/SOS1501091H"
}

Hercigonja, R.,& Rakić, V.. (2015). Enthalpy-entropy Compensation for n-hexane Adsorption on Y Zeolite Containing Transition Metal Cations. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 47(1), 83-88.
https://doi.org/10.2298/SOS1501091H

Hercigonja R, Rakić V. Enthalpy-entropy Compensation for n-hexane Adsorption on Y Zeolite Containing Transition Metal Cations. in Science of Sintering. 2015;47(1):83-88.
doi:10.2298/SOS1501091H .

Hercigonja, Radmila, Rakić, Vesna, "Enthalpy-entropy Compensation for n-hexane Adsorption on Y Zeolite Containing Transition Metal Cations" in Science of Sintering, 47, no. 1 (2015):83-88,
https://doi.org/10.2298/SOS1501091H . .

TY  - JOUR
AU  - Hercigonja, Radmila
AU  - Rac, Vladislav
AU  - Rakić, Vesna
AU  - Auroux, Aline
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3743
AB  - Besides its importance concerning fundamental studies on gas adsorption in narrow pores, investigation of the commensurate freezing of a fluid within a zeolite is of practical importance in the application of zeolites in the processes of adsorption, separation and catalysis. In this work, the adsorption of n-hexane on HZSM-5 and its transition metal ion-exchanged modified forms was studied at 303 K by means of microcalorimetry. The thermal molar entropies changes of adsorption were calculated and thereby, the freezing-like behaviour of n-hexane inside the structure of the zeolite as a confinement media was noticed. This effect is governed by the attractive interactions between n-hexane molecules and the pore walls, and is influenced by the length of the pores and the nature of the charge-balancing cations. Among the investigated zeolites, a solid-like phase of n-hexane in the pores of zeolites with Fe(II) ions was the most similar to solid bulk n-hexane, while Cu(II) ions contributed to the lowest ordering of the obtained solid-like n-hexane phase.
PB  - Srpsko hemijsko društvo, Beograd
T2  - JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
T1  - Effect of transition metal cations on the commensurate freezing of n-hexane confined in micropores of ZSM-5
EP  - 1309
IS  - 10
SP  - 1297
VL  - 80
DO  - 10.2298/JSC150203032H
ER  - 

@article{
author = "Hercigonja, Radmila and Rac, Vladislav and Rakić, Vesna and Auroux, Aline",
year = "2015",
abstract = "Besides its importance concerning fundamental studies on gas adsorption in narrow pores, investigation of the commensurate freezing of a fluid within a zeolite is of practical importance in the application of zeolites in the processes of adsorption, separation and catalysis. In this work, the adsorption of n-hexane on HZSM-5 and its transition metal ion-exchanged modified forms was studied at 303 K by means of microcalorimetry. The thermal molar entropies changes of adsorption were calculated and thereby, the freezing-like behaviour of n-hexane inside the structure of the zeolite as a confinement media was noticed. This effect is governed by the attractive interactions between n-hexane molecules and the pore walls, and is influenced by the length of the pores and the nature of the charge-balancing cations. Among the investigated zeolites, a solid-like phase of n-hexane in the pores of zeolites with Fe(II) ions was the most similar to solid bulk n-hexane, while Cu(II) ions contributed to the lowest ordering of the obtained solid-like n-hexane phase.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "JOURNAL OF THE SERBIAN CHEMICAL SOCIETY",
title = "Effect of transition metal cations on the commensurate freezing of n-hexane confined in micropores of ZSM-5",
pages = "1309-1297",
number = "10",
volume = "80",
doi = "10.2298/JSC150203032H"
}

Hercigonja, R., Rac, V., Rakić, V.,& Auroux, A.. (2015). Effect of transition metal cations on the commensurate freezing of n-hexane confined in micropores of ZSM-5. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
Srpsko hemijsko društvo, Beograd., 80(10), 1297-1309.
https://doi.org/10.2298/JSC150203032H

Hercigonja R, Rac V, Rakić V, Auroux A. Effect of transition metal cations on the commensurate freezing of n-hexane confined in micropores of ZSM-5. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY. 2015;80(10):1297-1309.
doi:10.2298/JSC150203032H .

Hercigonja, Radmila, Rac, Vladislav, Rakić, Vesna, Auroux, Aline, "Effect of transition metal cations on the commensurate freezing of n-hexane confined in micropores of ZSM-5" in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 80, no. 10 (2015):1297-1309,
https://doi.org/10.2298/JSC150203032H . .

TY  - JOUR
AU  - Milovanović, Jelena
AU  - Eich-Greatorex, Susanne
AU  - Krogstad, Tore
AU  - Rakić, Vesna
AU  - Rajić, Nevenka
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3742
AB  - Clinoptilolite-rich tuff (NZ) from the Zlatokop deposit (Vranjska Banja, Serbia) was studied as a nitrogen carrier for grass production. The mechanism of binding ammonium cations present in aqueous solutions by NZ was examined, as well as the possibility of adsorption of ammonia released in fresh cattle manure during its fermentation. The NH4+ binding from solutions proceeded via an ion-exchange process that followed pseudo-second-order kinetics. Adsorption isotherms studied at 298-318 K followed the Freundlich isotherm equation. The NZ readily adsorbs ammonia liberated from manure and the addition of 10 wt. % of NZ to manure can preserve up to 90 % of ammonia. The potential benefit of this effect was examined in greenhouse pot experiments with Italian ryegrass (Lolium multiflorum, var. Macho) using three different types of soil (silty, clayey and sandy). The zeta potential measurements showed that the stability of their colloidal dispersions differed mutually and that the addition of NZ affected the stability and nitrogen cycling differently. All results indicated that NZ could be applied in grass production.
PB  - Srpsko hemijsko društvo, Beograd
T2  - JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
T1  - The use in grass production of clinoptilolite as an ammonia adsorbent and a nitrogen carrier
EP  - 1214
IS  - 9
SP  - 1203
VL  - 80
DO  - 10.2298/JSC150317042M
ER  - 

@article{
author = "Milovanović, Jelena and Eich-Greatorex, Susanne and Krogstad, Tore and Rakić, Vesna and Rajić, Nevenka",
year = "2015",
abstract = "Clinoptilolite-rich tuff (NZ) from the Zlatokop deposit (Vranjska Banja, Serbia) was studied as a nitrogen carrier for grass production. The mechanism of binding ammonium cations present in aqueous solutions by NZ was examined, as well as the possibility of adsorption of ammonia released in fresh cattle manure during its fermentation. The NH4+ binding from solutions proceeded via an ion-exchange process that followed pseudo-second-order kinetics. Adsorption isotherms studied at 298-318 K followed the Freundlich isotherm equation. The NZ readily adsorbs ammonia liberated from manure and the addition of 10 wt. % of NZ to manure can preserve up to 90 % of ammonia. The potential benefit of this effect was examined in greenhouse pot experiments with Italian ryegrass (Lolium multiflorum, var. Macho) using three different types of soil (silty, clayey and sandy). The zeta potential measurements showed that the stability of their colloidal dispersions differed mutually and that the addition of NZ affected the stability and nitrogen cycling differently. All results indicated that NZ could be applied in grass production.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "JOURNAL OF THE SERBIAN CHEMICAL SOCIETY",
title = "The use in grass production of clinoptilolite as an ammonia adsorbent and a nitrogen carrier",
pages = "1214-1203",
number = "9",
volume = "80",
doi = "10.2298/JSC150317042M"
}

Milovanović, J., Eich-Greatorex, S., Krogstad, T., Rakić, V.,& Rajić, N.. (2015). The use in grass production of clinoptilolite as an ammonia adsorbent and a nitrogen carrier. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
Srpsko hemijsko društvo, Beograd., 80(9), 1203-1214.
https://doi.org/10.2298/JSC150317042M

Milovanović J, Eich-Greatorex S, Krogstad T, Rakić V, Rajić N. The use in grass production of clinoptilolite as an ammonia adsorbent and a nitrogen carrier. in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY. 2015;80(9):1203-1214.
doi:10.2298/JSC150317042M .

Milovanović, Jelena, Eich-Greatorex, Susanne, Krogstad, Tore, Rakić, Vesna, Rajić, Nevenka, "The use in grass production of clinoptilolite as an ammonia adsorbent and a nitrogen carrier" in JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, 80, no. 9 (2015):1203-1214,
https://doi.org/10.2298/JSC150317042M . .

TY  - JOUR
AU  - Malicanin, Marko
AU  - Rac, Vladislav
AU  - Antić, Vesna
AU  - Antić, Mališa
AU  - Palade, Laurentiu Mihai
AU  - Kefalas, Panagiotis
AU  - Rakić, Vesna
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3444
AB  - The goal of this work was to investigate the relationship between antioxidants' content and the oxidative stabilities of grape seed oils obtained from the Cabernet Sauvignon variety. The samples of grape seed oils were obtained by ultrasound assisted extraction. The time of extraction was varied, while the other relevant parameters: extraction temperature, solvent to solid ratio and sonication power were kept constant. For the sake of comparison, the extraction was also done using the conventional Soxhlet method. For all the oil samples obtained, the contents of total phenolic compounds (TPC), alpha-tocopherol and fatty acids were determined using relevant analytic methods. Importantly, in the present study, the modern analytical techniques for estimation of antioxidant capacity (measuring the chemiluminescence intensity of a luminol-hemin solution) and oxidative stability [differential scanning calorimetry (DSC), coupled with thermogravimetry (TG)] were proposed. The obtained results prove that ultrasonic irradiation enables effective extraction of grape seed oil. It was shown that the extractive yields and the amounts of total phenolic compounds and alpha-tocopherol increase with time of extraction; the optimum time was determined. Results obtained in this work show that, for both oxidative stability and antioxidant capacity, TPC have a more important role then alpha-tocopherol.
PB  - Wiley, Hoboken
T2  - Journal of the American Oil Chemists Society
T1  - Content of Antioxidants, Antioxidant Capacity and Oxidative Stability of Grape Seed Oil Obtained by Ultra Sound Assisted Extraction
EP  - 999
IS  - 6
SP  - 989
VL  - 91
DO  - 10.1007/s11746-014-2441-2
ER  - 

@article{
author = "Malicanin, Marko and Rac, Vladislav and Antić, Vesna and Antić, Mališa and Palade, Laurentiu Mihai and Kefalas, Panagiotis and Rakić, Vesna",
year = "2014",
abstract = "The goal of this work was to investigate the relationship between antioxidants' content and the oxidative stabilities of grape seed oils obtained from the Cabernet Sauvignon variety. The samples of grape seed oils were obtained by ultrasound assisted extraction. The time of extraction was varied, while the other relevant parameters: extraction temperature, solvent to solid ratio and sonication power were kept constant. For the sake of comparison, the extraction was also done using the conventional Soxhlet method. For all the oil samples obtained, the contents of total phenolic compounds (TPC), alpha-tocopherol and fatty acids were determined using relevant analytic methods. Importantly, in the present study, the modern analytical techniques for estimation of antioxidant capacity (measuring the chemiluminescence intensity of a luminol-hemin solution) and oxidative stability [differential scanning calorimetry (DSC), coupled with thermogravimetry (TG)] were proposed. The obtained results prove that ultrasonic irradiation enables effective extraction of grape seed oil. It was shown that the extractive yields and the amounts of total phenolic compounds and alpha-tocopherol increase with time of extraction; the optimum time was determined. Results obtained in this work show that, for both oxidative stability and antioxidant capacity, TPC have a more important role then alpha-tocopherol.",
publisher = "Wiley, Hoboken",
journal = "Journal of the American Oil Chemists Society",
title = "Content of Antioxidants, Antioxidant Capacity and Oxidative Stability of Grape Seed Oil Obtained by Ultra Sound Assisted Extraction",
pages = "999-989",
number = "6",
volume = "91",
doi = "10.1007/s11746-014-2441-2"
}

Malicanin, M., Rac, V., Antić, V., Antić, M., Palade, L. M., Kefalas, P.,& Rakić, V.. (2014). Content of Antioxidants, Antioxidant Capacity and Oxidative Stability of Grape Seed Oil Obtained by Ultra Sound Assisted Extraction. in Journal of the American Oil Chemists Society
Wiley, Hoboken., 91(6), 989-999.
https://doi.org/10.1007/s11746-014-2441-2

Malicanin M, Rac V, Antić V, Antić M, Palade LM, Kefalas P, Rakić V. Content of Antioxidants, Antioxidant Capacity and Oxidative Stability of Grape Seed Oil Obtained by Ultra Sound Assisted Extraction. in Journal of the American Oil Chemists Society. 2014;91(6):989-999.
doi:10.1007/s11746-014-2441-2 .

Malicanin, Marko, Rac, Vladislav, Antić, Vesna, Antić, Mališa, Palade, Laurentiu Mihai, Kefalas, Panagiotis, Rakić, Vesna, "Content of Antioxidants, Antioxidant Capacity and Oxidative Stability of Grape Seed Oil Obtained by Ultra Sound Assisted Extraction" in Journal of the American Oil Chemists Society, 91, no. 6 (2014):989-999,
https://doi.org/10.1007/s11746-014-2441-2 . .

TY  - JOUR
AU  - Rac, Vladislav
AU  - Rakić, Vesna
AU  - Stošić, Dušan
AU  - Otman, Otman
AU  - Auroux, Aline
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3414
AB  - The acidity of hierarchical USY, Beta and ZSM-5 zeolites obtained by alkaline treatment was investigated. Samples were characterized by low temperature nitrogen adsorption, X ray diffraction and solid-state (27)AI MAS NMR. Acidity of parent and mesoporous samples was estimated through the adsorption of typical probe molecules - measurements were conducted in both gas phase (microcalorimetry/volumetry of ammonia adsorption, FTIR spectrometry of pyridine adsorption/desorption) and aqueous phase (calorimetry of phenylethylamine adsorption). Quantitative distributions in strength of the acid sites were determined, as well as acid sites concentrations. No significant changes in total acidity were detected for ZSM-5. Acid sites strength was decreased in modified Beta and USY zeolites. The samples were probed as catalysts for the dehydration of fructose. Higher selectivities towards 5-hydroxymethylfurfural were detected for all modified zeolites, compared to the parent ones.
PB  - Elsevier Science Bv, Amsterdam
T2  - Microporous and Mesoporous Materials
T1  - Hierarchical ZSM-5, Beta and USY zeolites: Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction
EP  - 134
SP  - 126
VL  - 194
DO  - 10.1016/j.micromeso.2014.04.003
ER  - 

@article{
author = "Rac, Vladislav and Rakić, Vesna and Stošić, Dušan and Otman, Otman and Auroux, Aline",
year = "2014",
abstract = "The acidity of hierarchical USY, Beta and ZSM-5 zeolites obtained by alkaline treatment was investigated. Samples were characterized by low temperature nitrogen adsorption, X ray diffraction and solid-state (27)AI MAS NMR. Acidity of parent and mesoporous samples was estimated through the adsorption of typical probe molecules - measurements were conducted in both gas phase (microcalorimetry/volumetry of ammonia adsorption, FTIR spectrometry of pyridine adsorption/desorption) and aqueous phase (calorimetry of phenylethylamine adsorption). Quantitative distributions in strength of the acid sites were determined, as well as acid sites concentrations. No significant changes in total acidity were detected for ZSM-5. Acid sites strength was decreased in modified Beta and USY zeolites. The samples were probed as catalysts for the dehydration of fructose. Higher selectivities towards 5-hydroxymethylfurfural were detected for all modified zeolites, compared to the parent ones.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Microporous and Mesoporous Materials",
title = "Hierarchical ZSM-5, Beta and USY zeolites: Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction",
pages = "134-126",
volume = "194",
doi = "10.1016/j.micromeso.2014.04.003"
}

Rac, V., Rakić, V., Stošić, D., Otman, O.,& Auroux, A.. (2014). Hierarchical ZSM-5, Beta and USY zeolites: Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction. in Microporous and Mesoporous Materials
Elsevier Science Bv, Amsterdam., 194, 126-134.
https://doi.org/10.1016/j.micromeso.2014.04.003

Rac V, Rakić V, Stošić D, Otman O, Auroux A. Hierarchical ZSM-5, Beta and USY zeolites: Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction. in Microporous and Mesoporous Materials. 2014;194:126-134.
doi:10.1016/j.micromeso.2014.04.003 .

Rac, Vladislav, Rakić, Vesna, Stošić, Dušan, Otman, Otman, Auroux, Aline, "Hierarchical ZSM-5, Beta and USY zeolites: Acidity assessment by gas and aqueous phase calorimetry and catalytic activity in fructose dehydration reaction" in Microporous and Mesoporous Materials, 194 (2014):126-134,
https://doi.org/10.1016/j.micromeso.2014.04.003 . .

TY  - JOUR
AU  - Jevtić, Sanja
AU  - Arcon, Iztok
AU  - Recnik, Aleksander
AU  - Babić, Biljana M.
AU  - Mazaj, Matjai
AU  - Pavlović, Jelena
AU  - Matijasević, Danka
AU  - Nikšić, Miomir
AU  - Rajić, Nevenka
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3395
AB  - Se(IV) and Se(VI) anions are the dominant species of Se existing in aqueous systems. In this study, the iron(III)-modified natural zeolitic tuff (Fe-CLI) from the Serbian deposit Zlatokop has been investigated as an adsorbent for the Se oxyanions. Fe-CLI shows adsorption activity for both Se(IV) and Se(VI) which decreases with increasing pH. The adsorption capacity of Fe-CLI is found to be higher for Se(IV) than for Se(VI). Kinetics data follow the pseudo-second-order model and the obtained parameters k indicate that the rates of adsorption and desorption are higher for Se(VI). Extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES) analyses reveal that Se is bound at the zeolite surface forming not only the Se-O-Fe but also Se-O-Si bonds. The adsorption mechanism depends of the type of oxo ions. Samples of zeolitic tuff which contain Se were tested as soil supplements for the cultivation of Pleurotus ostreatus mushrooms. The fungus adsorbed the inorganic Se from zeolitic tuff transforming it to a more valuable organically bound form.
PB  - Elsevier, Amsterdam
T2  - Microporous and Mesoporous Materials
T1  - The iron(III)-modified natural zeolitic tuff as an adsorbent and carrier for selenium oxyanions
EP  - 100
SP  - 92
VL  - 197
DO  - 10.1016/j.micromeso.2014.06.008
ER  - 

@article{
author = "Jevtić, Sanja and Arcon, Iztok and Recnik, Aleksander and Babić, Biljana M. and Mazaj, Matjai and Pavlović, Jelena and Matijasević, Danka and Nikšić, Miomir and Rajić, Nevenka",
year = "2014",
abstract = "Se(IV) and Se(VI) anions are the dominant species of Se existing in aqueous systems. In this study, the iron(III)-modified natural zeolitic tuff (Fe-CLI) from the Serbian deposit Zlatokop has been investigated as an adsorbent for the Se oxyanions. Fe-CLI shows adsorption activity for both Se(IV) and Se(VI) which decreases with increasing pH. The adsorption capacity of Fe-CLI is found to be higher for Se(IV) than for Se(VI). Kinetics data follow the pseudo-second-order model and the obtained parameters k indicate that the rates of adsorption and desorption are higher for Se(VI). Extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES) analyses reveal that Se is bound at the zeolite surface forming not only the Se-O-Fe but also Se-O-Si bonds. The adsorption mechanism depends of the type of oxo ions. Samples of zeolitic tuff which contain Se were tested as soil supplements for the cultivation of Pleurotus ostreatus mushrooms. The fungus adsorbed the inorganic Se from zeolitic tuff transforming it to a more valuable organically bound form.",
publisher = "Elsevier, Amsterdam",
journal = "Microporous and Mesoporous Materials",
title = "The iron(III)-modified natural zeolitic tuff as an adsorbent and carrier for selenium oxyanions",
pages = "100-92",
volume = "197",
doi = "10.1016/j.micromeso.2014.06.008"
}

Jevtić, S., Arcon, I., Recnik, A., Babić, B. M., Mazaj, M., Pavlović, J., Matijasević, D., Nikšić, M.,& Rajić, N.. (2014). The iron(III)-modified natural zeolitic tuff as an adsorbent and carrier for selenium oxyanions. in Microporous and Mesoporous Materials
Elsevier, Amsterdam., 197, 92-100.
https://doi.org/10.1016/j.micromeso.2014.06.008

Jevtić S, Arcon I, Recnik A, Babić BM, Mazaj M, Pavlović J, Matijasević D, Nikšić M, Rajić N. The iron(III)-modified natural zeolitic tuff as an adsorbent and carrier for selenium oxyanions. in Microporous and Mesoporous Materials. 2014;197:92-100.
doi:10.1016/j.micromeso.2014.06.008 .

Jevtić, Sanja, Arcon, Iztok, Recnik, Aleksander, Babić, Biljana M., Mazaj, Matjai, Pavlović, Jelena, Matijasević, Danka, Nikšić, Miomir, Rajić, Nevenka, "The iron(III)-modified natural zeolitic tuff as an adsorbent and carrier for selenium oxyanions" in Microporous and Mesoporous Materials, 197 (2014):92-100,
https://doi.org/10.1016/j.micromeso.2014.06.008 . .

TY  - CONF
AU  - Rakić, Vesna
AU  - Rajić, Nevenka
AU  - Daković, Aleksandra
AU  - Auroux, Aline
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3309
AB  - In this study, adsorption of salicylic acid, acetylsalicylic acid and atenolol from aqueous solutions onto clinoptilolite modified with sorbed metallic cations (Cu(II), Zn(II), Ni(II) or Mn(II)) have been probed. Natural clays (kaolin and bentonite, pure or ion-exchanged by octadecyl dimethyl benzyl ammonium chloride) have been also probed as adsorbents. The adsorption was studied at 30 degrees C by titration microcalorimetry, employed to obtain the heats evolved as a result of adsorption. Adsorption experiments were performed under the same conditions, the equilibrium adsorbate concentrations were determined by fluorescence spectrophotometry. The maximal adsorption capacities of investigated solids against target pharmaceuticals lie in the range of 10(-5)-10(-6) mol/g. Modified minerals have shown different capacities in comparison with natural ones. The adsorption capacities are dependent on the characteristics of pharmaceutically active compound. The results obtained in this work show that natural materials can be used effectively in the removal of investigated pharmaceuticals by adsorption.
PB  - Elsevier, Amsterdam
C3  - Microporous and Mesoporous Materials
T1  - The adsorption of salicylic acid, acetylsalicylic acid and atenolol from aqueous solutions onto natural zeolites and clays: Clinoptilolite, bentonite and kaolin
EP  - 194
SP  - 185
VL  - 166
DO  - 10.1016/j.micromeso.2012.04.049
ER  - 

@conference{
author = "Rakić, Vesna and Rajić, Nevenka and Daković, Aleksandra and Auroux, Aline",
year = "2013",
abstract = "In this study, adsorption of salicylic acid, acetylsalicylic acid and atenolol from aqueous solutions onto clinoptilolite modified with sorbed metallic cations (Cu(II), Zn(II), Ni(II) or Mn(II)) have been probed. Natural clays (kaolin and bentonite, pure or ion-exchanged by octadecyl dimethyl benzyl ammonium chloride) have been also probed as adsorbents. The adsorption was studied at 30 degrees C by titration microcalorimetry, employed to obtain the heats evolved as a result of adsorption. Adsorption experiments were performed under the same conditions, the equilibrium adsorbate concentrations were determined by fluorescence spectrophotometry. The maximal adsorption capacities of investigated solids against target pharmaceuticals lie in the range of 10(-5)-10(-6) mol/g. Modified minerals have shown different capacities in comparison with natural ones. The adsorption capacities are dependent on the characteristics of pharmaceutically active compound. The results obtained in this work show that natural materials can be used effectively in the removal of investigated pharmaceuticals by adsorption.",
publisher = "Elsevier, Amsterdam",
journal = "Microporous and Mesoporous Materials",
title = "The adsorption of salicylic acid, acetylsalicylic acid and atenolol from aqueous solutions onto natural zeolites and clays: Clinoptilolite, bentonite and kaolin",
pages = "194-185",
volume = "166",
doi = "10.1016/j.micromeso.2012.04.049"
}

Rakić, V., Rajić, N., Daković, A.,& Auroux, A.. (2013). The adsorption of salicylic acid, acetylsalicylic acid and atenolol from aqueous solutions onto natural zeolites and clays: Clinoptilolite, bentonite and kaolin. in Microporous and Mesoporous Materials
Elsevier, Amsterdam., 166, 185-194.
https://doi.org/10.1016/j.micromeso.2012.04.049

Rakić V, Rajić N, Daković A, Auroux A. The adsorption of salicylic acid, acetylsalicylic acid and atenolol from aqueous solutions onto natural zeolites and clays: Clinoptilolite, bentonite and kaolin. in Microporous and Mesoporous Materials. 2013;166:185-194.
doi:10.1016/j.micromeso.2012.04.049 .

Rakić, Vesna, Rajić, Nevenka, Daković, Aleksandra, Auroux, Aline, "The adsorption of salicylic acid, acetylsalicylic acid and atenolol from aqueous solutions onto natural zeolites and clays: Clinoptilolite, bentonite and kaolin" in Microporous and Mesoporous Materials, 166 (2013):185-194,
https://doi.org/10.1016/j.micromeso.2012.04.049 . .

TY  - JOUR
AU  - Rac, Vladislav
AU  - Rakić, Vesna
AU  - Miladinović, Zoran
AU  - Stošić, Dušan
AU  - Auroux, Aline
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3289
AB  - The influence of the alkaline treatment on the acidity of zeolite ZSM-5 (SiO2/Al2O3 = 23, 50 and 80) modified by desilication was investigated. The samples were characterized by X-ray diffraction, low temperature adsorption of nitrogen and solid-state Al-27 MAS NMR. Acidity of the samples was investigated using microcalorimetry-volumetry of ammonia adsorption at 423 K. Acid sites accessibility and intracrystalline diffusion were estimated by the thermokinetic parameter. The desilication process was shown to be Si/Al ratio dependant. Relative enhancement of mesopore surface decreased in the following order of SiO2/Al2O3: 50 >80 >23. Pore size distribution broadened and mesopore sizes increased with increasing Si/Al ratio. For samples with SiO2/Al2O3 = 50 and 80 almost full preservation of acid sites strength and distribution was achieved. Significant alteration of the acidity was found for the mesoporous sample with SiO2/Al2O3 = 23. Thermokinetic parameter values indicate facilitated intracristalline diffusion for mesoporous samples.
PB  - Elsevier, Amsterdam
T2  - Thermochimica Acta
T1  - Influence of the desilication process on the acidity of HZSM-5 zeolite
EP  - 78
SP  - 73
VL  - 567
DO  - 10.1016/j.tca.2013.01.008
ER  - 

@article{
author = "Rac, Vladislav and Rakić, Vesna and Miladinović, Zoran and Stošić, Dušan and Auroux, Aline",
year = "2013",
abstract = "The influence of the alkaline treatment on the acidity of zeolite ZSM-5 (SiO2/Al2O3 = 23, 50 and 80) modified by desilication was investigated. The samples were characterized by X-ray diffraction, low temperature adsorption of nitrogen and solid-state Al-27 MAS NMR. Acidity of the samples was investigated using microcalorimetry-volumetry of ammonia adsorption at 423 K. Acid sites accessibility and intracrystalline diffusion were estimated by the thermokinetic parameter. The desilication process was shown to be Si/Al ratio dependant. Relative enhancement of mesopore surface decreased in the following order of SiO2/Al2O3: 50 >80 >23. Pore size distribution broadened and mesopore sizes increased with increasing Si/Al ratio. For samples with SiO2/Al2O3 = 50 and 80 almost full preservation of acid sites strength and distribution was achieved. Significant alteration of the acidity was found for the mesoporous sample with SiO2/Al2O3 = 23. Thermokinetic parameter values indicate facilitated intracristalline diffusion for mesoporous samples.",
publisher = "Elsevier, Amsterdam",
journal = "Thermochimica Acta",
title = "Influence of the desilication process on the acidity of HZSM-5 zeolite",
pages = "78-73",
volume = "567",
doi = "10.1016/j.tca.2013.01.008"
}

Rac, V., Rakić, V., Miladinović, Z., Stošić, D.,& Auroux, A.. (2013). Influence of the desilication process on the acidity of HZSM-5 zeolite. in Thermochimica Acta
Elsevier, Amsterdam., 567, 73-78.
https://doi.org/10.1016/j.tca.2013.01.008

Rac V, Rakić V, Miladinović Z, Stošić D, Auroux A. Influence of the desilication process on the acidity of HZSM-5 zeolite. in Thermochimica Acta. 2013;567:73-78.
doi:10.1016/j.tca.2013.01.008 .

Rac, Vladislav, Rakić, Vesna, Miladinović, Zoran, Stošić, Dušan, Auroux, Aline, "Influence of the desilication process on the acidity of HZSM-5 zeolite" in Thermochimica Acta, 567 (2013):73-78,
https://doi.org/10.1016/j.tca.2013.01.008 . .

TY  - JOUR
AU  - Hercigonja, Radmila
AU  - Rac, Vladislav
AU  - Rakić, Vesna
AU  - Auroux, Aline
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2994
AB  - In this work, the values of entropy changes related to n-hexane adsorption onto ion-exchanged ZSM-5 zeolites were calculated from differential heats, obtained from microcalorimetric experiments. The existence of enthalpy-entropy compensation effect, evidenced by the linearity of -Lambda H vs. -Lambda S plots and characteristic for all investigated ZSM-5 zeolites, was found. In the case of ZSM-5 structure, modifying the zeolite structure by ion-exchange gives rise to changes in the heats of adsorption and adsorption entropy in the same manner. The factors that can influence the appearance of entropy-enthalpy compensation were discussed. It was found that compensation effect is governed by ion-induced dipole interaction between highly polarizing cationic centres in zeolite and nonopolar n-hexane molecules, and hence, depends on the size, charge and electron configuration of the cation. It was found also that the compensation temperature is in correlation with the number of zeolites' strong acid centres. Contrary to the adsorption of n-hexane on ZSM-5 zeolites, compensation effect was not found for the adsorption of the same gas on faujasite-type zeolites.
PB  - Academic Press Ltd- Elsevier Science Ltd, London
T2  - Journal of Chemical Thermodynamics
T1  - Enthalpy-entropy compensation for n-hexane adsorption on HZSM-5 containing transition metal ions
EP  - 117
SP  - 112
VL  - 48
DO  - 10.1016/j.jct.2011.12.016
ER  - 

@article{
author = "Hercigonja, Radmila and Rac, Vladislav and Rakić, Vesna and Auroux, Aline",
year = "2012",
abstract = "In this work, the values of entropy changes related to n-hexane adsorption onto ion-exchanged ZSM-5 zeolites were calculated from differential heats, obtained from microcalorimetric experiments. The existence of enthalpy-entropy compensation effect, evidenced by the linearity of -Lambda H vs. -Lambda S plots and characteristic for all investigated ZSM-5 zeolites, was found. In the case of ZSM-5 structure, modifying the zeolite structure by ion-exchange gives rise to changes in the heats of adsorption and adsorption entropy in the same manner. The factors that can influence the appearance of entropy-enthalpy compensation were discussed. It was found that compensation effect is governed by ion-induced dipole interaction between highly polarizing cationic centres in zeolite and nonopolar n-hexane molecules, and hence, depends on the size, charge and electron configuration of the cation. It was found also that the compensation temperature is in correlation with the number of zeolites' strong acid centres. Contrary to the adsorption of n-hexane on ZSM-5 zeolites, compensation effect was not found for the adsorption of the same gas on faujasite-type zeolites.",
publisher = "Academic Press Ltd- Elsevier Science Ltd, London",
journal = "Journal of Chemical Thermodynamics",
title = "Enthalpy-entropy compensation for n-hexane adsorption on HZSM-5 containing transition metal ions",
pages = "117-112",
volume = "48",
doi = "10.1016/j.jct.2011.12.016"
}

Hercigonja, R., Rac, V., Rakić, V.,& Auroux, A.. (2012). Enthalpy-entropy compensation for n-hexane adsorption on HZSM-5 containing transition metal ions. in Journal of Chemical Thermodynamics
Academic Press Ltd- Elsevier Science Ltd, London., 48, 112-117.
https://doi.org/10.1016/j.jct.2011.12.016

Hercigonja R, Rac V, Rakić V, Auroux A. Enthalpy-entropy compensation for n-hexane adsorption on HZSM-5 containing transition metal ions. in Journal of Chemical Thermodynamics. 2012;48:112-117.
doi:10.1016/j.jct.2011.12.016 .

Hercigonja, Radmila, Rac, Vladislav, Rakić, Vesna, Auroux, Aline, "Enthalpy-entropy compensation for n-hexane adsorption on HZSM-5 containing transition metal ions" in Journal of Chemical Thermodynamics, 48 (2012):112-117,
https://doi.org/10.1016/j.jct.2011.12.016 . .

TY  - JOUR
AU  - Damjanović, Ljiljana
AU  - Rakić, Vesna
AU  - Rac, Vladislav
AU  - Stošić, Dušan
AU  - Auroux, Aline
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2364
AB  - This work reports results on phenol adsorption from aqueous solutions on synthetic BEA (beta) and MFI (ZSM-5) zeolites, studied by heat-flow microcalorimetry. For the sake of comparison, the adsorption was performed on activated carbon, a solid customarily used for removal of phenol from water. The obtained values of heats evolved during phenol adsorption indicate the heterogeneity of active sites present on the investigated systems for the adsorption of phenol. In addition, the amounts of adsorbed pollutant were determined and presented in the form of adsorption isotherms, which were interpreted using Langmuir, Freundlich, Dubinin-Astakov and Sips' equations. The latter was found to express high level of agreement with experimental data. The results obtained in this work reveal that the adsorption of phenol on zeolites depends on both Si/Al ratio and on the pore size. Hydrophobic zeolites that possess higher contents of Si show higher affinities for phenol adsorption. Among investigated zeolites, zeolite beta possesses the highest capacity for adsorption of phenol. The possibility of regeneration of used adsorbents was investigated by thermal desorption technique. It has been shown that in the case of beta zeolite the majority of adsorbed phenol is easily released in the low temperature region.
PB  - Elsevier, Amsterdam
T2  - Journal of Hazardous Materials
T1  - The investigation of phenol removal from aqueous solutions by zeolites as solid adsorbents
EP  - 484
IS  - 1-3
SP  - 477
VL  - 184
DO  - 10.1016/j.jhazmat.2010.08.059
ER  - 

@article{
author = "Damjanović, Ljiljana and Rakić, Vesna and Rac, Vladislav and Stošić, Dušan and Auroux, Aline",
year = "2010",
abstract = "This work reports results on phenol adsorption from aqueous solutions on synthetic BEA (beta) and MFI (ZSM-5) zeolites, studied by heat-flow microcalorimetry. For the sake of comparison, the adsorption was performed on activated carbon, a solid customarily used for removal of phenol from water. The obtained values of heats evolved during phenol adsorption indicate the heterogeneity of active sites present on the investigated systems for the adsorption of phenol. In addition, the amounts of adsorbed pollutant were determined and presented in the form of adsorption isotherms, which were interpreted using Langmuir, Freundlich, Dubinin-Astakov and Sips' equations. The latter was found to express high level of agreement with experimental data. The results obtained in this work reveal that the adsorption of phenol on zeolites depends on both Si/Al ratio and on the pore size. Hydrophobic zeolites that possess higher contents of Si show higher affinities for phenol adsorption. Among investigated zeolites, zeolite beta possesses the highest capacity for adsorption of phenol. The possibility of regeneration of used adsorbents was investigated by thermal desorption technique. It has been shown that in the case of beta zeolite the majority of adsorbed phenol is easily released in the low temperature region.",
publisher = "Elsevier, Amsterdam",
journal = "Journal of Hazardous Materials",
title = "The investigation of phenol removal from aqueous solutions by zeolites as solid adsorbents",
pages = "484-477",
number = "1-3",
volume = "184",
doi = "10.1016/j.jhazmat.2010.08.059"
}

Damjanović, L., Rakić, V., Rac, V., Stošić, D.,& Auroux, A.. (2010). The investigation of phenol removal from aqueous solutions by zeolites as solid adsorbents. in Journal of Hazardous Materials
Elsevier, Amsterdam., 184(1-3), 477-484.
https://doi.org/10.1016/j.jhazmat.2010.08.059

Damjanović L, Rakić V, Rac V, Stošić D, Auroux A. The investigation of phenol removal from aqueous solutions by zeolites as solid adsorbents. in Journal of Hazardous Materials. 2010;184(1-3):477-484.
doi:10.1016/j.jhazmat.2010.08.059 .

Damjanović, Ljiljana, Rakić, Vesna, Rac, Vladislav, Stošić, Dušan, Auroux, Aline, "The investigation of phenol removal from aqueous solutions by zeolites as solid adsorbents" in Journal of Hazardous Materials, 184, no. 1-3 (2010):477-484,
https://doi.org/10.1016/j.jhazmat.2010.08.059 . .