TY  - JOUR
AU  - Radovanović, Dragana
AU  - Dikić, Jelena
AU  - Štulović, Marija
AU  - Anđić, Zoran
AU  - Kamberović, Željko
AU  - Jevtić, Sanja
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6872
AB  - Low-cost   and   easily   available   natural   zeolite   is   a promising   adsorbent   for   metal   ions   removal   in   wastewater treatment.  The  possibility  of  using  zeolitic  tuff  from  Serbia  in  the form  of  Na-enriched  natural  zeolite  (Na-Z)  for  the adsorption  of Pb2+, Zn2+, Cu2+, and Ni2+ions from wastewater was investigated in the  presented  paper.  The  research  included  Na-Z  characterization and   determination   of   adsorption   kinetics   in   individual   ion adsorption tests using Weber-Morris intraparticle diffusion model, non-linear  pseudo-first-order  (PFO),  pseudo-second-order  (PSO) and mixed-order (MO) kinetic models. The results indicate that the adsorption processes of metal ions on Na-Z are complex processes dominated  by  multiple  rate-limiting  mechanisms  and  best  defined by the MO model. The mechanisms of ion diffusion and adsorption to active sites are equally represented in the Pb2+adsorption process. The  mechanism  of  ion  adsorption  on  the  active  sites  is  the  rate-limiting step in the Zn2+adsorption process, while in the case of the Cu2+and  Ni2+adsorption  ion  diffusion  is  the  rate-limiting  kinetic mechanism. Within the MO model, the PFO rate (external/internal diffusion)  and  the  PSO  rate  (adsorption  on  active  sites)  were calculated and results wereapplied to a multicomponent wastewater sample in order to determine and explain the adsorption efficiency in wastewater treatment. The results show that the rate of adsorption of  individual  metal  ions  and  the  efficiency  of  ion  removal  from  a multicomponent   wastewater   sample   are   influenced   by   several factors including the radius of the hydrated ion and the free energy of hydration. The achieved removal of metal ions by Na-Z is Pb2+(89%)  >  Cu2+(72%)  >  Zn2+(61%)  >  Ni2+(58%)  and  defines  Na-enriched  naturalzeolite  as  an  effective  adsorbent  in  wastewater treatment.
PB  - The Netherlands Press
T2  - Metallurgical and Materials Engineering
T1  - Sorption of Pb2+, Zn2+, Cu2+ and Ni2+ Ions on Na-enriched Natural Zeolite for Wastewater Treatment Process: A Kinetic Approach
EP  - 35
IS  - 3
SP  - 20
VL  - 29
DO  - 10.56801/MME1007
ER  - 

@article{
author = "Radovanović, Dragana and Dikić, Jelena and Štulović, Marija and Anđić, Zoran and Kamberović, Željko and Jevtić, Sanja",
year = "2023",
abstract = "Low-cost   and   easily   available   natural   zeolite   is   a promising   adsorbent   for   metal   ions   removal   in   wastewater treatment.  The  possibility  of  using  zeolitic  tuff  from  Serbia  in  the form  of  Na-enriched  natural  zeolite  (Na-Z)  for  the adsorption  of Pb2+, Zn2+, Cu2+, and Ni2+ions from wastewater was investigated in the  presented  paper.  The  research  included  Na-Z  characterization and   determination   of   adsorption   kinetics   in   individual   ion adsorption tests using Weber-Morris intraparticle diffusion model, non-linear  pseudo-first-order  (PFO),  pseudo-second-order  (PSO) and mixed-order (MO) kinetic models. The results indicate that the adsorption processes of metal ions on Na-Z are complex processes dominated  by  multiple  rate-limiting  mechanisms  and  best  defined by the MO model. The mechanisms of ion diffusion and adsorption to active sites are equally represented in the Pb2+adsorption process. The  mechanism  of  ion  adsorption  on  the  active  sites  is  the  rate-limiting step in the Zn2+adsorption process, while in the case of the Cu2+and  Ni2+adsorption  ion  diffusion  is  the  rate-limiting  kinetic mechanism. Within the MO model, the PFO rate (external/internal diffusion)  and  the  PSO  rate  (adsorption  on  active  sites)  were calculated and results wereapplied to a multicomponent wastewater sample in order to determine and explain the adsorption efficiency in wastewater treatment. The results show that the rate of adsorption of  individual  metal  ions  and  the  efficiency  of  ion  removal  from  a multicomponent   wastewater   sample   are   influenced   by   several factors including the radius of the hydrated ion and the free energy of hydration. The achieved removal of metal ions by Na-Z is Pb2+(89%)  >  Cu2+(72%)  >  Zn2+(61%)  >  Ni2+(58%)  and  defines  Na-enriched  naturalzeolite  as  an  effective  adsorbent  in  wastewater treatment.",
publisher = "The Netherlands Press",
journal = "Metallurgical and Materials Engineering",
title = "Sorption of Pb2+, Zn2+, Cu2+ and Ni2+ Ions on Na-enriched Natural Zeolite for Wastewater Treatment Process: A Kinetic Approach",
pages = "35-20",
number = "3",
volume = "29",
doi = "10.56801/MME1007"
}

Radovanović, D., Dikić, J., Štulović, M., Anđić, Z., Kamberović, Ž.,& Jevtić, S.. (2023). Sorption of Pb2+, Zn2+, Cu2+ and Ni2+ Ions on Na-enriched Natural Zeolite for Wastewater Treatment Process: A Kinetic Approach. in Metallurgical and Materials Engineering
The Netherlands Press., 29(3), 20-35.
https://doi.org/10.56801/MME1007

Radovanović D, Dikić J, Štulović M, Anđić Z, Kamberović Ž, Jevtić S. Sorption of Pb2+, Zn2+, Cu2+ and Ni2+ Ions on Na-enriched Natural Zeolite for Wastewater Treatment Process: A Kinetic Approach. in Metallurgical and Materials Engineering. 2023;29(3):20-35.
doi:10.56801/MME1007 .

Radovanović, Dragana, Dikić, Jelena, Štulović, Marija, Anđić, Zoran, Kamberović, Željko, Jevtić, Sanja, "Sorption of Pb2+, Zn2+, Cu2+ and Ni2+ Ions on Na-enriched Natural Zeolite for Wastewater Treatment Process: A Kinetic Approach" in Metallurgical and Materials Engineering, 29, no. 3 (2023):20-35,
https://doi.org/10.56801/MME1007 . .

TY  - JOUR
AU  - Pajnik, Jelena
AU  - Dikić, Jelena
AU  - Milovanović, Stoja
AU  - Milošević, Milena
AU  - Jevtić, Sanja
AU  - Lukić, Ivana
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5085
AB  - Chitosan/gelatin and chitosan/gelatin/zeolite films prepared by solvent casting method were
impregnated with a mixture of thymol and carvacrol using a green solvent, supercritical carbon 
dioxide at 35 °C and 30 MPa, during 18 h. Proposed method enabled preparation of biocompatible 
and biodegradable blends with strong antioxidant and antibacterial activity, whereby amounts of 
loaded thymol/carvacrol mixture were in the range from 3.3-6%. After initial burst release, both 
types of films exhibited gradual release of bioactive compounds, with around 72 and 96% of 
impregnated thymol/carvacrol mixture released in water and PBS (pH 7.4) during tested period of 10 days, respectively. Results of water vapor transmission rate (> 76 gm-2
day-1) confirmed that prepared composites are suitable for wound dressing application. Thermal analysis showed superior properties of prepared thymol/carvacrol loaded films compared to control samples. In addition, mechanical and structural properties, as well as solubility and swelling behavior of the obtained films were investigated in detail.
PB  - Wiley
T2  - Macromolecular Materials and Engineering
T1  - Zeolite/chitosan/gelatin films: preparation, supercritical CO2 processing, characterization and bioactivity
EP  - 13
IS  - 4
SP  - 1
VL  - 307
DO  - 10.1002/mame.202200009
ER  - 

@article{
author = "Pajnik, Jelena and Dikić, Jelena and Milovanović, Stoja and Milošević, Milena and Jevtić, Sanja and Lukić, Ivana",
year = "2022",
abstract = "Chitosan/gelatin and chitosan/gelatin/zeolite films prepared by solvent casting method were
impregnated with a mixture of thymol and carvacrol using a green solvent, supercritical carbon 
dioxide at 35 °C and 30 MPa, during 18 h. Proposed method enabled preparation of biocompatible 
and biodegradable blends with strong antioxidant and antibacterial activity, whereby amounts of 
loaded thymol/carvacrol mixture were in the range from 3.3-6%. After initial burst release, both 
types of films exhibited gradual release of bioactive compounds, with around 72 and 96% of 
impregnated thymol/carvacrol mixture released in water and PBS (pH 7.4) during tested period of 10 days, respectively. Results of water vapor transmission rate (> 76 gm-2
day-1) confirmed that prepared composites are suitable for wound dressing application. Thermal analysis showed superior properties of prepared thymol/carvacrol loaded films compared to control samples. In addition, mechanical and structural properties, as well as solubility and swelling behavior of the obtained films were investigated in detail.",
publisher = "Wiley",
journal = "Macromolecular Materials and Engineering",
title = "Zeolite/chitosan/gelatin films: preparation, supercritical CO2 processing, characterization and bioactivity",
pages = "13-1",
number = "4",
volume = "307",
doi = "10.1002/mame.202200009"
}

Pajnik, J., Dikić, J., Milovanović, S., Milošević, M., Jevtić, S.,& Lukić, I.. (2022). Zeolite/chitosan/gelatin films: preparation, supercritical CO2 processing, characterization and bioactivity. in Macromolecular Materials and Engineering
Wiley., 307(4), 1-13.
https://doi.org/10.1002/mame.202200009

Pajnik J, Dikić J, Milovanović S, Milošević M, Jevtić S, Lukić I. Zeolite/chitosan/gelatin films: preparation, supercritical CO2 processing, characterization and bioactivity. in Macromolecular Materials and Engineering. 2022;307(4):1-13.
doi:10.1002/mame.202200009 .

Pajnik, Jelena, Dikić, Jelena, Milovanović, Stoja, Milošević, Milena, Jevtić, Sanja, Lukić, Ivana, "Zeolite/chitosan/gelatin films: preparation, supercritical CO2 processing, characterization and bioactivity" in Macromolecular Materials and Engineering, 307, no. 4 (2022):1-13,
https://doi.org/10.1002/mame.202200009 . .

TY  - JOUR
AU  - Pajnik, Jelena
AU  - Dikić, Jelena
AU  - Milovanović, Stoja
AU  - Milošević, Milena
AU  - Jevtić, Sanja
AU  - Lukić, Ivana
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5086
AB  - Chitosan/gelatin and chitosan/gelatin/zeolite films prepared by solvent casting method were impregnated with a mixture of thymol and carvacrol using a green solvent, supercritical carbon dioxide at 35 °C and 30 MPa, during 18 h. Proposed method enabled preparation of biocompatible and biodegradable blends with strong antioxidant and antibacterial activity, whereby amounts of loaded thymol/carvacrol mixture were in the range from 3.3-6%. After initial burst release, both types of films exhibited gradual release of bioactive compounds, with around 72 and 96% of impregnated thymol/carvacrol mixture released in water and PBS (pH 7.4) during tested period of 10 days, respectively. Results of water vapor transmission rate (> 76 gm-2 day-1) confirmed that prepared composites are suitable for wound dressing application. Thermal analysis showed superior properties of prepared thymol/carvacrol loaded films compared to control samples. In addition, mechanical and structural properties, as well as solubility and swelling behavior of the obtained films were investigated in detail.
PB  - Wiley
T2  - Macromolecular Materials and Engineering
T1  - Zeolite/Chitosan/Gelatin Films: Preparation, SupercriticalCO2Processing, Characterization, and Bioactivity
EP  - 13
IS  - 4
SP  - 1
VL  - 307
DO  - 10.1002/mame.202200009
ER  - 

@article{
author = "Pajnik, Jelena and Dikić, Jelena and Milovanović, Stoja and Milošević, Milena and Jevtić, Sanja and Lukić, Ivana",
year = "2022",
abstract = "Chitosan/gelatin and chitosan/gelatin/zeolite films prepared by solvent casting method were impregnated with a mixture of thymol and carvacrol using a green solvent, supercritical carbon dioxide at 35 °C and 30 MPa, during 18 h. Proposed method enabled preparation of biocompatible and biodegradable blends with strong antioxidant and antibacterial activity, whereby amounts of loaded thymol/carvacrol mixture were in the range from 3.3-6%. After initial burst release, both types of films exhibited gradual release of bioactive compounds, with around 72 and 96% of impregnated thymol/carvacrol mixture released in water and PBS (pH 7.4) during tested period of 10 days, respectively. Results of water vapor transmission rate (> 76 gm-2 day-1) confirmed that prepared composites are suitable for wound dressing application. Thermal analysis showed superior properties of prepared thymol/carvacrol loaded films compared to control samples. In addition, mechanical and structural properties, as well as solubility and swelling behavior of the obtained films were investigated in detail.",
publisher = "Wiley",
journal = "Macromolecular Materials and Engineering",
title = "Zeolite/Chitosan/Gelatin Films: Preparation, SupercriticalCO2Processing, Characterization, and Bioactivity",
pages = "13-1",
number = "4",
volume = "307",
doi = "10.1002/mame.202200009"
}

Pajnik, J., Dikić, J., Milovanović, S., Milošević, M., Jevtić, S.,& Lukić, I.. (2022). Zeolite/Chitosan/Gelatin Films: Preparation, SupercriticalCO2Processing, Characterization, and Bioactivity. in Macromolecular Materials and Engineering
Wiley., 307(4), 1-13.
https://doi.org/10.1002/mame.202200009

Pajnik J, Dikić J, Milovanović S, Milošević M, Jevtić S, Lukić I. Zeolite/Chitosan/Gelatin Films: Preparation, SupercriticalCO2Processing, Characterization, and Bioactivity. in Macromolecular Materials and Engineering. 2022;307(4):1-13.
doi:10.1002/mame.202200009 .

Pajnik, Jelena, Dikić, Jelena, Milovanović, Stoja, Milošević, Milena, Jevtić, Sanja, Lukić, Ivana, "Zeolite/Chitosan/Gelatin Films: Preparation, SupercriticalCO2Processing, Characterization, and Bioactivity" in Macromolecular Materials and Engineering, 307, no. 4 (2022):1-13,
https://doi.org/10.1002/mame.202200009 . .

TY  - CONF
AU  - Milojković, Natalija
AU  - Orlić, Marina
AU  - Dikić, Jelena
AU  - Zunic, Milan
AU  - Simović, Bojana
AU  - Dapčević, Aleksandra
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6478
AB  - Regarding enormous expansion of bacterial contamination as well as their increase resistivity to commonly used disinfectants, there is a great demand for antibacterial material, which will not be based on organic compounds. Among various inorganic substances, environmentally friendly, low-cost and chemically stable ZnO and TiO2 demonstrate considerable antibacterial activity.This work primarily focuses on idea of developing novel disinfectant based on both, ZnO and TiO2, which would integrate all the worthy properties of both oxides. For that matter, titanium(IV) butoxide was dissolved in a solution of zinc acetate following with the ammonia addition until pH value was 8.5. Half of the initial solution was hydrothermally treated, dried and calcined at 500 (H-ZnTi-500) and 800°C (H-ZnTi-800). Two other samples (ZnTi-500 and ZnTi-800) were obtained from the other half of the initial solution which was directly dried and calcined under the same conditions. The samples were characterized by XRD including Rietveld refinement, FESEMand TG/DTA. Antibacterial activity was examined towards Gram-positive S. aureus and Gram-negative E. coli .The results showed that only ZnTi-800 consisted of pure Zn2TiO4 (Fd-3m) while Zn TiO was the major phase in three other samples. In the case of samples calcined at 500 °C, traces of ZnO were found. H-ZnTi-800 contained three phases: Zn2TiO4, ZnO and Zn2Ti3O8 (P4332). Cubic Zn2TiO4 contains two cation sites: tetrahedrally coordinated Zn at 0,0,0 and octahedral site at 5/8,5/8,5/8 shared between Zn and Ti. The calculated a-parameters of all obtained Zn2TiO4 as well as Zn–O and Zn/Ti–O bond distances were independent of synthesis. At 500 °C nanocrystalline Zn2TiO4 were obtained with the crystallite sizes 26 and 71 nm for H-ZnTi-500 and ZnTi-500, respectively, while microcrystalline phases were obtained at 800 °C with the crystallite sizes larger than 110 nm. The soft agglomerates consisted of smaller particles were obtained at 500 °C comparing to samples at 800 °C having more compact agglomerates.The best antibacterial activity with high reduction in the number of bacteria cells (87.6 % of E. coli and 63.4 % of S. aureus) was exhibited by the ZnTi-500. It means that the purity of samples, crystallite size and softness of agglomerates, influence antibacterial activity and that optimal level of all factors should be reached since ZnTi-500 was almost pure with sufficiently small crystallites and soft agglomerates.
PB  - European Powder Diffraction Conference (17 ; 2022 ; Šibenik)
C3  - European Powder Diffraction Conference -ЕPDIC17, Šibenik, Croatia, Book of Abstracts
T1  - A novel disinfectant based on zinc orthotitanate
SP  - 206
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1969
ER  - 

@conference{
author = "Milojković, Natalija and Orlić, Marina and Dikić, Jelena and Zunic, Milan and Simović, Bojana and Dapčević, Aleksandra",
year = "2022",
abstract = "Regarding enormous expansion of bacterial contamination as well as their increase resistivity to commonly used disinfectants, there is a great demand for antibacterial material, which will not be based on organic compounds. Among various inorganic substances, environmentally friendly, low-cost and chemically stable ZnO and TiO2 demonstrate considerable antibacterial activity.This work primarily focuses on idea of developing novel disinfectant based on both, ZnO and TiO2, which would integrate all the worthy properties of both oxides. For that matter, titanium(IV) butoxide was dissolved in a solution of zinc acetate following with the ammonia addition until pH value was 8.5. Half of the initial solution was hydrothermally treated, dried and calcined at 500 (H-ZnTi-500) and 800°C (H-ZnTi-800). Two other samples (ZnTi-500 and ZnTi-800) were obtained from the other half of the initial solution which was directly dried and calcined under the same conditions. The samples were characterized by XRD including Rietveld refinement, FESEMand TG/DTA. Antibacterial activity was examined towards Gram-positive S. aureus and Gram-negative E. coli .The results showed that only ZnTi-800 consisted of pure Zn2TiO4 (Fd-3m) while Zn TiO was the major phase in three other samples. In the case of samples calcined at 500 °C, traces of ZnO were found. H-ZnTi-800 contained three phases: Zn2TiO4, ZnO and Zn2Ti3O8 (P4332). Cubic Zn2TiO4 contains two cation sites: tetrahedrally coordinated Zn at 0,0,0 and octahedral site at 5/8,5/8,5/8 shared between Zn and Ti. The calculated a-parameters of all obtained Zn2TiO4 as well as Zn–O and Zn/Ti–O bond distances were independent of synthesis. At 500 °C nanocrystalline Zn2TiO4 were obtained with the crystallite sizes 26 and 71 nm for H-ZnTi-500 and ZnTi-500, respectively, while microcrystalline phases were obtained at 800 °C with the crystallite sizes larger than 110 nm. The soft agglomerates consisted of smaller particles were obtained at 500 °C comparing to samples at 800 °C having more compact agglomerates.The best antibacterial activity with high reduction in the number of bacteria cells (87.6 % of E. coli and 63.4 % of S. aureus) was exhibited by the ZnTi-500. It means that the purity of samples, crystallite size and softness of agglomerates, influence antibacterial activity and that optimal level of all factors should be reached since ZnTi-500 was almost pure with sufficiently small crystallites and soft agglomerates.",
publisher = "European Powder Diffraction Conference (17 ; 2022 ; Šibenik)",
journal = "European Powder Diffraction Conference -ЕPDIC17, Šibenik, Croatia, Book of Abstracts",
title = "A novel disinfectant based on zinc orthotitanate",
pages = "206",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1969"
}

Milojković, N., Orlić, M., Dikić, J., Zunic, M., Simović, B.,& Dapčević, A.. (2022). A novel disinfectant based on zinc orthotitanate. in European Powder Diffraction Conference -ЕPDIC17, Šibenik, Croatia, Book of Abstracts
European Powder Diffraction Conference (17 ; 2022 ; Šibenik)., 206.
https://hdl.handle.net/21.15107/rcub_rimsi_1969

Milojković N, Orlić M, Dikić J, Zunic M, Simović B, Dapčević A. A novel disinfectant based on zinc orthotitanate. in European Powder Diffraction Conference -ЕPDIC17, Šibenik, Croatia, Book of Abstracts. 2022;:206.
https://hdl.handle.net/21.15107/rcub_rimsi_1969 .

Milojković, Natalija, Orlić, Marina, Dikić, Jelena, Zunic, Milan, Simović, Bojana, Dapčević, Aleksandra, "A novel disinfectant based on zinc orthotitanate" in European Powder Diffraction Conference -ЕPDIC17, Šibenik, Croatia, Book of Abstracts (2022):206,
https://hdl.handle.net/21.15107/rcub_rimsi_1969 .

TY  - CONF
AU  - Dimitrijević, Jelena
AU  - Petrović, Jelena
AU  - Milošević, Dragana
AU  - Dikić, Jelena
AU  - Jevtić, Sanja
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6479
AB  - Silanization of the natural and synthetic zeolites as well as their use as adsorbents for removing arsenic(III) oxyanions from wastewater are the topic of this paper. Two types of zeolite were used: natural zeolite-clinoptilolite from Zlatokop deposit, Vranjska Banja, Serbia, previously converted to H+-form and synthetic zeolite, mordenite. The modification was performed with solution (3-aminopropyl) triethoxysilane (APTES). The presence of APTES on the surface of zeolite was confirmed using TG/DSC and FTIR analysis. The results showed that natural aminosilane-modified zeolite has a higher adsorption capacity for arsenic(III) oxyanions compared to mordenite prepared in the same way. The kinetic data follow the Lagergren pseudo-second-order model. This model implies a chemical interaction between AsO33–- ions and functional groups on the silanized zeolite surface.
PB  - Croatia : Croatian Zeolites Association
C3  - Proceedings of the 9th Croatian-Slovenian-Serbian Symposium on Zeolites
T1  - Removal of arsenic(III) oxyanions from wastewater using aminosilane -modified natural and synthetic zeolite
EP  - 50
SP  - 47
UR  - https://hdl.handle.net/21.15107/rcub_cer_4893
ER  - 

@conference{
author = "Dimitrijević, Jelena and Petrović, Jelena and Milošević, Dragana and Dikić, Jelena and Jevtić, Sanja",
year = "2021",
abstract = "Silanization of the natural and synthetic zeolites as well as their use as adsorbents for removing arsenic(III) oxyanions from wastewater are the topic of this paper. Two types of zeolite were used: natural zeolite-clinoptilolite from Zlatokop deposit, Vranjska Banja, Serbia, previously converted to H+-form and synthetic zeolite, mordenite. The modification was performed with solution (3-aminopropyl) triethoxysilane (APTES). The presence of APTES on the surface of zeolite was confirmed using TG/DSC and FTIR analysis. The results showed that natural aminosilane-modified zeolite has a higher adsorption capacity for arsenic(III) oxyanions compared to mordenite prepared in the same way. The kinetic data follow the Lagergren pseudo-second-order model. This model implies a chemical interaction between AsO33–- ions and functional groups on the silanized zeolite surface.",
publisher = "Croatia : Croatian Zeolites Association",
journal = "Proceedings of the 9th Croatian-Slovenian-Serbian Symposium on Zeolites",
title = "Removal of arsenic(III) oxyanions from wastewater using aminosilane -modified natural and synthetic zeolite",
pages = "50-47",
url = "https://hdl.handle.net/21.15107/rcub_cer_4893"
}

Dimitrijević, J., Petrović, J., Milošević, D., Dikić, J.,& Jevtić, S.. (2021). Removal of arsenic(III) oxyanions from wastewater using aminosilane -modified natural and synthetic zeolite. in Proceedings of the 9th Croatian-Slovenian-Serbian Symposium on Zeolites
Croatia : Croatian Zeolites Association., 47-50.
https://hdl.handle.net/21.15107/rcub_cer_4893

Dimitrijević J, Petrović J, Milošević D, Dikić J, Jevtić S. Removal of arsenic(III) oxyanions from wastewater using aminosilane -modified natural and synthetic zeolite. in Proceedings of the 9th Croatian-Slovenian-Serbian Symposium on Zeolites. 2021;:47-50.
https://hdl.handle.net/21.15107/rcub_cer_4893 .

Dimitrijević, Jelena, Petrović, Jelena, Milošević, Dragana, Dikić, Jelena, Jevtić, Sanja, "Removal of arsenic(III) oxyanions from wastewater using aminosilane -modified natural and synthetic zeolite" in Proceedings of the 9th Croatian-Slovenian-Serbian Symposium on Zeolites (2021):47-50,
https://hdl.handle.net/21.15107/rcub_cer_4893 .

TY  - JOUR
AU  - Dikić, Jelena
AU  - Lukić, Ivana
AU  - Pajnik, Jelena
AU  - Pavlovic, Jelena
AU  - Hrenovic, Jasna
AU  - Rajić, Nevenka
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4915
AB  - Novel composites based on natural zeolite-clinoptilolite and monoterpene phenols-thymol and carvacrol were prepared by supercritical solvent impregnation (SSI) in supercritical carbon dioxide (scCO(2)) at 30 MPa and 35 degrees C during 18 h. The content of phenols in composites (thymol-23.0 and carvacrol-19.1 wt%) was determined using both C,H,N and thermal analysis (TGA); interactions of the phenols with the zeolite lattice studied by Fourier transform infrared spectroscopy (FTIR) and powder X-ray diffraction (PXRD) showed that the zeolite lattice was preserved in the composites. The composites exhibited antibacterial activity toward Gram-negative bacteria Escherichia coli DSM 498 and Gram-positive bacteria Staphylococcus aureus ATCC 25923 in different water media (phosphate buffer solution, spring water and lake water). After 1 h carvacrol-containing clinoptilolite showed better antibacterial activity than composite with thymol. Both composites expressed bactericidal effect after 24 h of contact. Leaching of the phenols from composite in water was more pronounced from thymol (22.7-32.1%) than for carvacrol (6.2-8.9%) suggesting influence of steric effect on the desorption process.
T2  - Journal of Porous Materials
T1  - Antibacterial activity of thymol/carvacrol and clinoptilolite composites prepared by supercritical solvent impregnation
EP  - 1584
IS  - 5
SP  - 1577
VL  - 28
DO  - 10.1007/s10934-021-01107-y
ER  - 

@article{
author = "Dikić, Jelena and Lukić, Ivana and Pajnik, Jelena and Pavlovic, Jelena and Hrenovic, Jasna and Rajić, Nevenka",
year = "2021",
abstract = "Novel composites based on natural zeolite-clinoptilolite and monoterpene phenols-thymol and carvacrol were prepared by supercritical solvent impregnation (SSI) in supercritical carbon dioxide (scCO(2)) at 30 MPa and 35 degrees C during 18 h. The content of phenols in composites (thymol-23.0 and carvacrol-19.1 wt%) was determined using both C,H,N and thermal analysis (TGA); interactions of the phenols with the zeolite lattice studied by Fourier transform infrared spectroscopy (FTIR) and powder X-ray diffraction (PXRD) showed that the zeolite lattice was preserved in the composites. The composites exhibited antibacterial activity toward Gram-negative bacteria Escherichia coli DSM 498 and Gram-positive bacteria Staphylococcus aureus ATCC 25923 in different water media (phosphate buffer solution, spring water and lake water). After 1 h carvacrol-containing clinoptilolite showed better antibacterial activity than composite with thymol. Both composites expressed bactericidal effect after 24 h of contact. Leaching of the phenols from composite in water was more pronounced from thymol (22.7-32.1%) than for carvacrol (6.2-8.9%) suggesting influence of steric effect on the desorption process.",
journal = "Journal of Porous Materials",
title = "Antibacterial activity of thymol/carvacrol and clinoptilolite composites prepared by supercritical solvent impregnation",
pages = "1584-1577",
number = "5",
volume = "28",
doi = "10.1007/s10934-021-01107-y"
}

Dikić, J., Lukić, I., Pajnik, J., Pavlovic, J., Hrenovic, J.,& Rajić, N.. (2021). Antibacterial activity of thymol/carvacrol and clinoptilolite composites prepared by supercritical solvent impregnation. in Journal of Porous Materials, 28(5), 1577-1584.
https://doi.org/10.1007/s10934-021-01107-y

Dikić J, Lukić I, Pajnik J, Pavlovic J, Hrenovic J, Rajić N. Antibacterial activity of thymol/carvacrol and clinoptilolite composites prepared by supercritical solvent impregnation. in Journal of Porous Materials. 2021;28(5):1577-1584.
doi:10.1007/s10934-021-01107-y .

Dikić, Jelena, Lukić, Ivana, Pajnik, Jelena, Pavlovic, Jelena, Hrenovic, Jasna, Rajić, Nevenka, "Antibacterial activity of thymol/carvacrol and clinoptilolite composites prepared by supercritical solvent impregnation" in Journal of Porous Materials, 28, no. 5 (2021):1577-1584,
https://doi.org/10.1007/s10934-021-01107-y . .

TY  - JOUR
AU  - Kalebić, Barbara
AU  - Pavlovic, Jelena
AU  - Dikić, Jelena
AU  - Recnik, Aleksander
AU  - Gyergyek, Saso
AU  - Skoro, Nikola
AU  - Rajić, Nevenka
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4925
AB  - The adsorption of the antibiotic ciprofloxacin (CIP) from an aqueous solution by natural zeolite, the calcium-rich clinoptilolite (CLI), and magnetite-coated CLI (MAG-CLI) was investigated. Both CLI and MAG-CLI showed a high adsorption affinity towards CIP at 283, 288 and 293 K at a pH of 5. Adsorption kinetics studied for the initial concentrations of 15-75 mg CIP dm(-3) follow Lagergren's pseudo-second order equation and the adsorption is best represented by the Langmuir model. The adsorption mechanism involves strong electrostatic interactions between negatively charged aluminosilicate lattice and the cationic form of CIP accompanied by an ion-exchange reaction. Magnetite coverage (approx. 12 wt.%) induces magnetism, which can facilitate the separation process. The coverage does not influence the adsorption activity of CLI. The leaching test showed that the MAG coating protects the adsorbent from CIP leaching. This is ascribed to interactions between the CIP carboxyl groups and magnetite nano-particles. Antibacterial tests showed strong antibacterial activity of the ciprofloxacin-containing adsorbents towards pathogenic E. coli and S. aureus.
T2  - Minerals
T1  - Use of Natural Clinoptilolite in the Preparation of an Efficient Adsorbent for Ciprofloxacin Removal from Aqueous Media
IS  - 5
VL  - 11
DO  - 10.3390/min11050518
ER  - 

@article{
author = "Kalebić, Barbara and Pavlovic, Jelena and Dikić, Jelena and Recnik, Aleksander and Gyergyek, Saso and Skoro, Nikola and Rajić, Nevenka",
year = "2021",
abstract = "The adsorption of the antibiotic ciprofloxacin (CIP) from an aqueous solution by natural zeolite, the calcium-rich clinoptilolite (CLI), and magnetite-coated CLI (MAG-CLI) was investigated. Both CLI and MAG-CLI showed a high adsorption affinity towards CIP at 283, 288 and 293 K at a pH of 5. Adsorption kinetics studied for the initial concentrations of 15-75 mg CIP dm(-3) follow Lagergren's pseudo-second order equation and the adsorption is best represented by the Langmuir model. The adsorption mechanism involves strong electrostatic interactions between negatively charged aluminosilicate lattice and the cationic form of CIP accompanied by an ion-exchange reaction. Magnetite coverage (approx. 12 wt.%) induces magnetism, which can facilitate the separation process. The coverage does not influence the adsorption activity of CLI. The leaching test showed that the MAG coating protects the adsorbent from CIP leaching. This is ascribed to interactions between the CIP carboxyl groups and magnetite nano-particles. Antibacterial tests showed strong antibacterial activity of the ciprofloxacin-containing adsorbents towards pathogenic E. coli and S. aureus.",
journal = "Minerals",
title = "Use of Natural Clinoptilolite in the Preparation of an Efficient Adsorbent for Ciprofloxacin Removal from Aqueous Media",
number = "5",
volume = "11",
doi = "10.3390/min11050518"
}

Kalebić, B., Pavlovic, J., Dikić, J., Recnik, A., Gyergyek, S., Skoro, N.,& Rajić, N.. (2021). Use of Natural Clinoptilolite in the Preparation of an Efficient Adsorbent for Ciprofloxacin Removal from Aqueous Media. in Minerals, 11(5).
https://doi.org/10.3390/min11050518

Kalebić B, Pavlovic J, Dikić J, Recnik A, Gyergyek S, Skoro N, Rajić N. Use of Natural Clinoptilolite in the Preparation of an Efficient Adsorbent for Ciprofloxacin Removal from Aqueous Media. in Minerals. 2021;11(5).
doi:10.3390/min11050518 .

Kalebić, Barbara, Pavlovic, Jelena, Dikić, Jelena, Recnik, Aleksander, Gyergyek, Saso, Skoro, Nikola, Rajić, Nevenka, "Use of Natural Clinoptilolite in the Preparation of an Efficient Adsorbent for Ciprofloxacin Removal from Aqueous Media" in Minerals, 11, no. 5 (2021),
https://doi.org/10.3390/min11050518 . .

TY  - JOUR
AU  - Pajnik, Jelena
AU  - Lukić, Ivana
AU  - Dikić, Jelena
AU  - Ašanin, Jelena
AU  - Gordić, Milan V.
AU  - Mišić, Dušan
AU  - Žižović, Irena
AU  - Korzeniowska, Malgorzata
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4442
AB  - In the present study, supercritical solvent impregnation (SSI) has been applied to incorporate thymol into bio-composite polymers as a potential active packaging material. Thymol, a natural component with a proven antimicrobial activity, was successfully impregnated into starch-chitosan (SC) and starch-chitosan-zeolite (SCZ) films using supercritical carbon dioxide (scCO(2)) as a solvent. Experiments were performed at 35 degrees C, pressures of 15.5 and 30 MPa, and an impregnation time in the range of 4-24 h. The highest impregnation yields of SC films with starch to chitosan mass ratios of 1:1 and 1:2 were 10.80% and 6.48%, respectively. The addition of natural zeolite (15-60%) significantly increased the loading capacity of films enabling thymol incorporation in a quantity of 16.7-27.3%. FTIR and SEM analyses were applied for the characterization of the films. Mechanical properties and water vapor permeability of films before and after the impregnation were tested as well. Thymol release kinetics in deionized water was followed and modeled by the Korsmeyer-Peppas and Weibull model. SCZ films with thymol loading of approximately 24% exhibited strong antibacterial activity against E. coli and methicillin-resistant Staphylococcus (S.) aureus (MRSA).
PB  - MDPI, Basel
T2  - Molecules
T1  - Application of Supercritical Solvent Impregnation for Production of Zeolite Modified Starch-Chitosan Polymers with Antibacterial Properties
IS  - 20
VL  - 25
DO  - 10.3390/molecules25204717
ER  - 

@article{
author = "Pajnik, Jelena and Lukić, Ivana and Dikić, Jelena and Ašanin, Jelena and Gordić, Milan V. and Mišić, Dušan and Žižović, Irena and Korzeniowska, Malgorzata",
year = "2020",
abstract = "In the present study, supercritical solvent impregnation (SSI) has been applied to incorporate thymol into bio-composite polymers as a potential active packaging material. Thymol, a natural component with a proven antimicrobial activity, was successfully impregnated into starch-chitosan (SC) and starch-chitosan-zeolite (SCZ) films using supercritical carbon dioxide (scCO(2)) as a solvent. Experiments were performed at 35 degrees C, pressures of 15.5 and 30 MPa, and an impregnation time in the range of 4-24 h. The highest impregnation yields of SC films with starch to chitosan mass ratios of 1:1 and 1:2 were 10.80% and 6.48%, respectively. The addition of natural zeolite (15-60%) significantly increased the loading capacity of films enabling thymol incorporation in a quantity of 16.7-27.3%. FTIR and SEM analyses were applied for the characterization of the films. Mechanical properties and water vapor permeability of films before and after the impregnation were tested as well. Thymol release kinetics in deionized water was followed and modeled by the Korsmeyer-Peppas and Weibull model. SCZ films with thymol loading of approximately 24% exhibited strong antibacterial activity against E. coli and methicillin-resistant Staphylococcus (S.) aureus (MRSA).",
publisher = "MDPI, Basel",
journal = "Molecules",
title = "Application of Supercritical Solvent Impregnation for Production of Zeolite Modified Starch-Chitosan Polymers with Antibacterial Properties",
number = "20",
volume = "25",
doi = "10.3390/molecules25204717"
}

Pajnik, J., Lukić, I., Dikić, J., Ašanin, J., Gordić, M. V., Mišić, D., Žižović, I.,& Korzeniowska, M.. (2020). Application of Supercritical Solvent Impregnation for Production of Zeolite Modified Starch-Chitosan Polymers with Antibacterial Properties. in Molecules
MDPI, Basel., 25(20).
https://doi.org/10.3390/molecules25204717

Pajnik J, Lukić I, Dikić J, Ašanin J, Gordić MV, Mišić D, Žižović I, Korzeniowska M. Application of Supercritical Solvent Impregnation for Production of Zeolite Modified Starch-Chitosan Polymers with Antibacterial Properties. in Molecules. 2020;25(20).
doi:10.3390/molecules25204717 .

Pajnik, Jelena, Lukić, Ivana, Dikić, Jelena, Ašanin, Jelena, Gordić, Milan V., Mišić, Dušan, Žižović, Irena, Korzeniowska, Malgorzata, "Application of Supercritical Solvent Impregnation for Production of Zeolite Modified Starch-Chitosan Polymers with Antibacterial Properties" in Molecules, 25, no. 20 (2020),
https://doi.org/10.3390/molecules25204717 . .

TY  - JOUR
AU  - Hrenović, Jasna
AU  - Dekić, Svjetlana
AU  - Dikić, Jelena
AU  - Kazazić, Snjezana
AU  - Durn, Goran
AU  - Rajić, Nevenka
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4521
AB  - Due to the development of resistance to antimicrobial agents, bacterium Acinetobacter baumannii is nowadays a leading cause of nosocomial outbreaks. Clinically relevant A. baumannii outside hospital settings including natural soils affected by human waste represents a public-health risk for humans and animals. The aim of this study was to investigate the potential of metal-loaded zeolites to eliminate viable A. baumannii from artificially contaminated natural soils. A. baumannii isolate was subjected to the activity of natural zeolitised tuff (NZ) and Cu-modified (CuNZ) or Ag-modified zeolite (AgNZ) in wet, slightly acidic terra rossa and slightly alkaline red palaeosol. A. baumannii survived in terra rossa and red palaeosol supplemented with 1 wt% of NZ for seven days and four months, respectively. The addition of 1 wt% of CuNZ to terra rossa and red palaeosol shortened the survival of A. baumannii to three and 14 days, respectively. The addition of 0.1 wt% of AgNZ to both soils resulted in complete removal of viable A. baumannii within 1 h of contact, while the total native heterotrophic bacterial counts remained high. Since AgNZ is prepared with a simple modification of cost-effective and environmentally friendly natural zeolite, it is a promising material for the remediation of soils contaminated with pandrug-resistant A. baumannii.
PB  - Inst Medical Research & Occupational Health, Zagreb
T2  - Arhiv za higijenu rada i toksikologiju-Archives of Industrial Hygiene and Toxicology
T1  - Metal-loaded zeolite remediation of soils contaminated with pandrug-resistant Acinetobacter baumannii
EP  - 151
IS  - 2
SP  - 146
VL  - 71
DO  - 10.2478/aiht-2020-71-3327
ER  - 

@article{
author = "Hrenović, Jasna and Dekić, Svjetlana and Dikić, Jelena and Kazazić, Snjezana and Durn, Goran and Rajić, Nevenka",
year = "2020",
abstract = "Due to the development of resistance to antimicrobial agents, bacterium Acinetobacter baumannii is nowadays a leading cause of nosocomial outbreaks. Clinically relevant A. baumannii outside hospital settings including natural soils affected by human waste represents a public-health risk for humans and animals. The aim of this study was to investigate the potential of metal-loaded zeolites to eliminate viable A. baumannii from artificially contaminated natural soils. A. baumannii isolate was subjected to the activity of natural zeolitised tuff (NZ) and Cu-modified (CuNZ) or Ag-modified zeolite (AgNZ) in wet, slightly acidic terra rossa and slightly alkaline red palaeosol. A. baumannii survived in terra rossa and red palaeosol supplemented with 1 wt% of NZ for seven days and four months, respectively. The addition of 1 wt% of CuNZ to terra rossa and red palaeosol shortened the survival of A. baumannii to three and 14 days, respectively. The addition of 0.1 wt% of AgNZ to both soils resulted in complete removal of viable A. baumannii within 1 h of contact, while the total native heterotrophic bacterial counts remained high. Since AgNZ is prepared with a simple modification of cost-effective and environmentally friendly natural zeolite, it is a promising material for the remediation of soils contaminated with pandrug-resistant A. baumannii.",
publisher = "Inst Medical Research & Occupational Health, Zagreb",
journal = "Arhiv za higijenu rada i toksikologiju-Archives of Industrial Hygiene and Toxicology",
title = "Metal-loaded zeolite remediation of soils contaminated with pandrug-resistant Acinetobacter baumannii",
pages = "151-146",
number = "2",
volume = "71",
doi = "10.2478/aiht-2020-71-3327"
}

Hrenović, J., Dekić, S., Dikić, J., Kazazić, S., Durn, G.,& Rajić, N.. (2020). Metal-loaded zeolite remediation of soils contaminated with pandrug-resistant Acinetobacter baumannii. in Arhiv za higijenu rada i toksikologiju-Archives of Industrial Hygiene and Toxicology
Inst Medical Research & Occupational Health, Zagreb., 71(2), 146-151.
https://doi.org/10.2478/aiht-2020-71-3327

Hrenović J, Dekić S, Dikić J, Kazazić S, Durn G, Rajić N. Metal-loaded zeolite remediation of soils contaminated with pandrug-resistant Acinetobacter baumannii. in Arhiv za higijenu rada i toksikologiju-Archives of Industrial Hygiene and Toxicology. 2020;71(2):146-151.
doi:10.2478/aiht-2020-71-3327 .

Hrenović, Jasna, Dekić, Svjetlana, Dikić, Jelena, Kazazić, Snjezana, Durn, Goran, Rajić, Nevenka, "Metal-loaded zeolite remediation of soils contaminated with pandrug-resistant Acinetobacter baumannii" in Arhiv za higijenu rada i toksikologiju-Archives of Industrial Hygiene and Toxicology, 71, no. 2 (2020):146-151,
https://doi.org/10.2478/aiht-2020-71-3327 . .

TY  - CONF
AU  - Dikić, Jelena
AU  - Pavlović, Jelena
AU  - Lukić, Ivana
AU  - Balošević, Svetlana
AU  - Rajić, Nevenka
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6480
AB  - Composites based on natural zeolite – clinoptilolite and thymol were prepared using
two different approaches: 1) wet impregnation (WI) and supercritical solvent impregnation
(SSI). The SSI was more superior since it yielded the composite with higher amount of
thymol and with stronger thymol-clinoptilolite interactions than WI. The composites
exhibited antibacterial activity towards Gram-negative bacteria Escherichia coli and Grampositive bacteria Staphylococcus aureus suggesting its applicability for disinfectant purposes.
PB  - Srpsko zeolitsko drustvo, Beograd
C3  - Proceedings of the 8th Serbian-Croatian-Slovenian Symposium on Zeolites
T1  - PREPARATION, CHARACTERIZATION AND ANTIBACTERIAL ACTIVITY OF CLINOPTILOLITE/THYMOL COMPOSITES
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6480
ER  - 

@conference{
author = "Dikić, Jelena and Pavlović, Jelena and Lukić, Ivana and Balošević, Svetlana and Rajić, Nevenka",
year = "2019",
abstract = "Composites based on natural zeolite – clinoptilolite and thymol were prepared using
two different approaches: 1) wet impregnation (WI) and supercritical solvent impregnation
(SSI). The SSI was more superior since it yielded the composite with higher amount of
thymol and with stronger thymol-clinoptilolite interactions than WI. The composites
exhibited antibacterial activity towards Gram-negative bacteria Escherichia coli and Grampositive bacteria Staphylococcus aureus suggesting its applicability for disinfectant purposes.",
publisher = "Srpsko zeolitsko drustvo, Beograd",
journal = "Proceedings of the 8th Serbian-Croatian-Slovenian Symposium on Zeolites",
title = "PREPARATION, CHARACTERIZATION AND ANTIBACTERIAL ACTIVITY OF CLINOPTILOLITE/THYMOL COMPOSITES",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6480"
}

Dikić, J., Pavlović, J., Lukić, I., Balošević, S.,& Rajić, N.. (2019). PREPARATION, CHARACTERIZATION AND ANTIBACTERIAL ACTIVITY OF CLINOPTILOLITE/THYMOL COMPOSITES. in Proceedings of the 8th Serbian-Croatian-Slovenian Symposium on Zeolites
Srpsko zeolitsko drustvo, Beograd..
https://hdl.handle.net/21.15107/rcub_technorep_6480

Dikić J, Pavlović J, Lukić I, Balošević S, Rajić N. PREPARATION, CHARACTERIZATION AND ANTIBACTERIAL ACTIVITY OF CLINOPTILOLITE/THYMOL COMPOSITES. in Proceedings of the 8th Serbian-Croatian-Slovenian Symposium on Zeolites. 2019;.
https://hdl.handle.net/21.15107/rcub_technorep_6480 .

Dikić, Jelena, Pavlović, Jelena, Lukić, Ivana, Balošević, Svetlana, Rajić, Nevenka, "PREPARATION, CHARACTERIZATION AND ANTIBACTERIAL ACTIVITY OF CLINOPTILOLITE/THYMOL COMPOSITES" in Proceedings of the 8th Serbian-Croatian-Slovenian Symposium on Zeolites (2019),
https://hdl.handle.net/21.15107/rcub_technorep_6480 .

TY  - JOUR
AU  - Dikić, Jelena
AU  - Hrenović, Jasna
AU  - Durn, Goran
AU  - Kovacić, Ana
AU  - Rajić, Nevenka
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4109
AB  - Antibacterial activity of a natural zeolite, clinoptilolite (Z), enriched with about 0.4-0.5 mmol of Ag (Ag-Z), Cu (Cu-Z) or Zn (Zn-Z) was tested toward two strains of Gram-negative bacteria - Escherichia coli and Acinetobacter baumannii - in natural seawater from Adriatic Sea (Croatia). The Ag-Z and Cu-Z exhibited bactericidal activity toward E. coli and A. baumannii after 3 and 6 h of exposure, respectively. The Zn-Z showed antibacterial activity toward both strains, but lacking the bactericidal effect even after 24 h of exposure. All studied samples released metal cations in seawater. Concentration of Ag and Zn leached from Ag-Z and Zn-Z was higher than maximum allowable concentrations (MAC) for drinking water, whereas concentration of Cu was below MAC. Due to high concentration of Na+ in seawater (about 1.2 g Na+ dm(-3)) an ion-exchange process can be responsible for the leaching of the studied cations. The lowest extent of leaching from Cu-Z was ascribed to different position and geometry of sites occupied by Cu(II) in the clinoptilolite lattice. The antibacterial activity of M-Z was attributed to the metal cations leached from the zeolite lattice into seawater. The obtained results indicate that Cu-Z can be considered as a promising disinfectant for treatment of seawater.
PB  - Desalination Publ, Hopkinton
T2  - Desalination and Water Treatment
T1  - Antibacterial activity of metal-containing clinoptilolite in natural seawater
EP  - 79
SP  - 75
VL  - 170
DO  - 10.5004/dwt.2019.24712
ER  - 

@article{
author = "Dikić, Jelena and Hrenović, Jasna and Durn, Goran and Kovacić, Ana and Rajić, Nevenka",
year = "2019",
abstract = "Antibacterial activity of a natural zeolite, clinoptilolite (Z), enriched with about 0.4-0.5 mmol of Ag (Ag-Z), Cu (Cu-Z) or Zn (Zn-Z) was tested toward two strains of Gram-negative bacteria - Escherichia coli and Acinetobacter baumannii - in natural seawater from Adriatic Sea (Croatia). The Ag-Z and Cu-Z exhibited bactericidal activity toward E. coli and A. baumannii after 3 and 6 h of exposure, respectively. The Zn-Z showed antibacterial activity toward both strains, but lacking the bactericidal effect even after 24 h of exposure. All studied samples released metal cations in seawater. Concentration of Ag and Zn leached from Ag-Z and Zn-Z was higher than maximum allowable concentrations (MAC) for drinking water, whereas concentration of Cu was below MAC. Due to high concentration of Na+ in seawater (about 1.2 g Na+ dm(-3)) an ion-exchange process can be responsible for the leaching of the studied cations. The lowest extent of leaching from Cu-Z was ascribed to different position and geometry of sites occupied by Cu(II) in the clinoptilolite lattice. The antibacterial activity of M-Z was attributed to the metal cations leached from the zeolite lattice into seawater. The obtained results indicate that Cu-Z can be considered as a promising disinfectant for treatment of seawater.",
publisher = "Desalination Publ, Hopkinton",
journal = "Desalination and Water Treatment",
title = "Antibacterial activity of metal-containing clinoptilolite in natural seawater",
pages = "79-75",
volume = "170",
doi = "10.5004/dwt.2019.24712"
}

Dikić, J., Hrenović, J., Durn, G., Kovacić, A.,& Rajić, N.. (2019). Antibacterial activity of metal-containing clinoptilolite in natural seawater. in Desalination and Water Treatment
Desalination Publ, Hopkinton., 170, 75-79.
https://doi.org/10.5004/dwt.2019.24712

Dikić J, Hrenović J, Durn G, Kovacić A, Rajić N. Antibacterial activity of metal-containing clinoptilolite in natural seawater. in Desalination and Water Treatment. 2019;170:75-79.
doi:10.5004/dwt.2019.24712 .

Dikić, Jelena, Hrenović, Jasna, Durn, Goran, Kovacić, Ana, Rajić, Nevenka, "Antibacterial activity of metal-containing clinoptilolite in natural seawater" in Desalination and Water Treatment, 170 (2019):75-79,
https://doi.org/10.5004/dwt.2019.24712 . .

TY  - JOUR
AU  - Ivanković, Tomislav
AU  - Dikić, Jelena
AU  - du Roscoat, Sabine Rolland
AU  - Dekić, Svjetlana
AU  - Hrenović, Jasna
AU  - Ganjto, Marin
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4091
AB  - Hospital wastewaters can become a route for dissemination of antibiotic-resistant bacteria to the environment if not properly treated. Some of these bacteria are able to survive conventional disinfection treatments (e.g. chlorination, UV irradiation), which evokes the need for novel disinfection methods. The metal-exchanged zeolites were tested as novel antibacterial agents for wastewater treatment. The natural zeolite clinoptilolite enriched with silver (AgNZ) showed far better antibacterial activity towards hospital pathogenic bacterium Acinetobacter baumannii when compared with copper-exchanged zeolite (CuNZ), with minimal bactericidal concentration of 0.25-2 (AgNZ) compared with 32-64 mg L-1 (CuNZ) in a batch system and respective log 5.6 reduction compared with log 0.5 reduction in a flow system with pure bacterial culture. In the flow system with real effluent wastewater from the treatment plant, the removal of carbapenem-resistant bacteria using AgNZ was 90-100% during the 4 days of the experimental run. These results indicate that the AgNZ efficiently removes pathogenic bacteria from the wastewater, including A. baumannii, and is promising as a disinfectant material in a bead filter system.
PB  - Iwa Publishing, London
T2  - Water Science and Technology
T1  - Removal of emerging pathogenic bacteria using metal-exchanged natural zeolite bead filter
EP  - 1098
IS  - 6
SP  - 1085
VL  - 80
DO  - 10.2166/wst.2019.348
ER  - 

@article{
author = "Ivanković, Tomislav and Dikić, Jelena and du Roscoat, Sabine Rolland and Dekić, Svjetlana and Hrenović, Jasna and Ganjto, Marin",
year = "2019",
abstract = "Hospital wastewaters can become a route for dissemination of antibiotic-resistant bacteria to the environment if not properly treated. Some of these bacteria are able to survive conventional disinfection treatments (e.g. chlorination, UV irradiation), which evokes the need for novel disinfection methods. The metal-exchanged zeolites were tested as novel antibacterial agents for wastewater treatment. The natural zeolite clinoptilolite enriched with silver (AgNZ) showed far better antibacterial activity towards hospital pathogenic bacterium Acinetobacter baumannii when compared with copper-exchanged zeolite (CuNZ), with minimal bactericidal concentration of 0.25-2 (AgNZ) compared with 32-64 mg L-1 (CuNZ) in a batch system and respective log 5.6 reduction compared with log 0.5 reduction in a flow system with pure bacterial culture. In the flow system with real effluent wastewater from the treatment plant, the removal of carbapenem-resistant bacteria using AgNZ was 90-100% during the 4 days of the experimental run. These results indicate that the AgNZ efficiently removes pathogenic bacteria from the wastewater, including A. baumannii, and is promising as a disinfectant material in a bead filter system.",
publisher = "Iwa Publishing, London",
journal = "Water Science and Technology",
title = "Removal of emerging pathogenic bacteria using metal-exchanged natural zeolite bead filter",
pages = "1098-1085",
number = "6",
volume = "80",
doi = "10.2166/wst.2019.348"
}

Ivanković, T., Dikić, J., du Roscoat, S. R., Dekić, S., Hrenović, J.,& Ganjto, M.. (2019). Removal of emerging pathogenic bacteria using metal-exchanged natural zeolite bead filter. in Water Science and Technology
Iwa Publishing, London., 80(6), 1085-1098.
https://doi.org/10.2166/wst.2019.348

Ivanković T, Dikić J, du Roscoat SR, Dekić S, Hrenović J, Ganjto M. Removal of emerging pathogenic bacteria using metal-exchanged natural zeolite bead filter. in Water Science and Technology. 2019;80(6):1085-1098.
doi:10.2166/wst.2019.348 .

Ivanković, Tomislav, Dikić, Jelena, du Roscoat, Sabine Rolland, Dekić, Svjetlana, Hrenović, Jasna, Ganjto, Marin, "Removal of emerging pathogenic bacteria using metal-exchanged natural zeolite bead filter" in Water Science and Technology, 80, no. 6 (2019):1085-1098,
https://doi.org/10.2166/wst.2019.348 . .

TY  - JOUR
AU  - Dikić, Jelena
AU  - Hrenović, Jasna
AU  - Matijasević, Danka
AU  - Nikšić, Miomir
AU  - Rajić, Nevenka
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3578
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  gt  Cu-NZ ae Cu-A  gt  Zn-NZ  gt  gt  gt  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 = "Dikić, 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  gt  Cu-NZ ae Cu-A  gt  Zn-NZ  gt  gt  gt  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"
}

Dikić, 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

Dikić 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 .

Dikić, 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  - Stojaković, Đorđe
AU  - Dikić, Jelena
AU  - Stupar, Stevan
AU  - Veličković, Zlate
AU  - Rajić, Nevenka
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3278
AB  - Sorption of the Zn2+ and Ni2+ ions by the Na+-enriched natural clinoptilolite (Na-CLI) from aqueous solutions containing both Zn2+ and Ni2+ ions at a range of concentrations has been studied at 298, 308, and 318K. It was found that the sorption of a particular ion by Na-CLI increases with the increase in the initial concentration of the solution of that ion. At a given initial concentration, the sorption degree increases with temperature. Also, the sorption of a particular ion is greater when the initial solution contains a second ion than it is when the particular ion is present alone. The sorption kinetics is in accord with the pseudo-second-order reaction rate model. The values of the k(2) rate constant do not show a regular change with the initial Zn2+/Ni2+ concentrations probably because the presence of the second ion has a significant effect on the reaction rate. Thermodynamic study has shown that the sorption is exothermic, occurring spontaneously in the 298-318K range and with a positive entropy change.
PB  - Taylor & Francis Inc, Philadelphia
T2  - Desalination and Water Treatment
T1  - Binary adsorption of nickel and zinc from aqueous solutions onto the Serbian natural clinoptilolite
EP  - 18754
IS  - 40
SP  - 18748
VL  - 57
DO  - 10.1080/19443994.2015.1094426
ER  - 

@article{
author = "Stojaković, Đorđe and Dikić, Jelena and Stupar, Stevan and Veličković, Zlate and Rajić, Nevenka",
year = "2016",
abstract = "Sorption of the Zn2+ and Ni2+ ions by the Na+-enriched natural clinoptilolite (Na-CLI) from aqueous solutions containing both Zn2+ and Ni2+ ions at a range of concentrations has been studied at 298, 308, and 318K. It was found that the sorption of a particular ion by Na-CLI increases with the increase in the initial concentration of the solution of that ion. At a given initial concentration, the sorption degree increases with temperature. Also, the sorption of a particular ion is greater when the initial solution contains a second ion than it is when the particular ion is present alone. The sorption kinetics is in accord with the pseudo-second-order reaction rate model. The values of the k(2) rate constant do not show a regular change with the initial Zn2+/Ni2+ concentrations probably because the presence of the second ion has a significant effect on the reaction rate. Thermodynamic study has shown that the sorption is exothermic, occurring spontaneously in the 298-318K range and with a positive entropy change.",
publisher = "Taylor & Francis Inc, Philadelphia",
journal = "Desalination and Water Treatment",
title = "Binary adsorption of nickel and zinc from aqueous solutions onto the Serbian natural clinoptilolite",
pages = "18754-18748",
number = "40",
volume = "57",
doi = "10.1080/19443994.2015.1094426"
}

Stojaković, Đ., Dikić, J., Stupar, S., Veličković, Z.,& Rajić, N.. (2016). Binary adsorption of nickel and zinc from aqueous solutions onto the Serbian natural clinoptilolite. in Desalination and Water Treatment
Taylor & Francis Inc, Philadelphia., 57(40), 18748-18754.
https://doi.org/10.1080/19443994.2015.1094426

Stojaković Đ, Dikić J, Stupar S, Veličković Z, Rajić N. Binary adsorption of nickel and zinc from aqueous solutions onto the Serbian natural clinoptilolite. in Desalination and Water Treatment. 2016;57(40):18748-18754.
doi:10.1080/19443994.2015.1094426 .

Stojaković, Đorđe, Dikić, Jelena, Stupar, Stevan, Veličković, Zlate, Rajić, Nevenka, "Binary adsorption of nickel and zinc from aqueous solutions onto the Serbian natural clinoptilolite" in Desalination and Water Treatment, 57, no. 40 (2016):18748-18754,
https://doi.org/10.1080/19443994.2015.1094426 . .

TY  - JOUR
AU  - Dikić, Jelena
AU  - Hrenović, Jasna
AU  - Goić-Barisić, Ivana
AU  - Tomić, Miloš D.
AU  - Rajić, Nevenka
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3122
AB  - The multidrug-resistant bacteria Acinetobacter baumannii cause serious hospital infections. Commercial poly(vinyl chloride) (PVC) used for endotracheal tubes was modified in order to obtain a composite with an antibacterial effect towards a clinical isolate of A. baumannii ST145. The composites were prepared by addition of different amounts of copper-containing zeolite tuff (CuZ) and by successive impregnation with D-tyrosine (D-Tyr) solution. The composites that were obtained by addition of CuZ (CuZ PVC) only did not exhibit an antibacterial effect. The impregnation of the CuZ PVC by D-Tyr resulted in an antibacterial effect which was explained by a synergistic effect of CuZ and D-Tyr. Rheological tests confirmed that the modification of PVC by CuZ does not affect its processability and reformability.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Antibacterial activity of copper-containing clinoptilolite/PVC composites toward clinical isolate of Acinetobacter baumannii
EP  - 826
IS  - 6
SP  - 819
VL  - 80
DO  - 10.2298/JSC141225017M
ER  - 

@article{
author = "Dikić, Jelena and Hrenović, Jasna and Goić-Barisić, Ivana and Tomić, Miloš D. and Rajić, Nevenka",
year = "2015",
abstract = "The multidrug-resistant bacteria Acinetobacter baumannii cause serious hospital infections. Commercial poly(vinyl chloride) (PVC) used for endotracheal tubes was modified in order to obtain a composite with an antibacterial effect towards a clinical isolate of A. baumannii ST145. The composites were prepared by addition of different amounts of copper-containing zeolite tuff (CuZ) and by successive impregnation with D-tyrosine (D-Tyr) solution. The composites that were obtained by addition of CuZ (CuZ PVC) only did not exhibit an antibacterial effect. The impregnation of the CuZ PVC by D-Tyr resulted in an antibacterial effect which was explained by a synergistic effect of CuZ and D-Tyr. Rheological tests confirmed that the modification of PVC by CuZ does not affect its processability and reformability.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Antibacterial activity of copper-containing clinoptilolite/PVC composites toward clinical isolate of Acinetobacter baumannii",
pages = "826-819",
number = "6",
volume = "80",
doi = "10.2298/JSC141225017M"
}

Dikić, J., Hrenović, J., Goić-Barisić, I., Tomić, M. D.,& Rajić, N.. (2015). Antibacterial activity of copper-containing clinoptilolite/PVC composites toward clinical isolate of Acinetobacter baumannii. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 80(6), 819-826.
https://doi.org/10.2298/JSC141225017M

Dikić J, Hrenović J, Goić-Barisić I, Tomić MD, Rajić N. Antibacterial activity of copper-containing clinoptilolite/PVC composites toward clinical isolate of Acinetobacter baumannii. in Journal of the Serbian Chemical Society. 2015;80(6):819-826.
doi:10.2298/JSC141225017M .

Dikić, Jelena, Hrenović, Jasna, Goić-Barisić, Ivana, Tomić, Miloš D., Rajić, Nevenka, "Antibacterial activity of copper-containing clinoptilolite/PVC composites toward clinical isolate of Acinetobacter baumannii" in Journal of the Serbian Chemical Society, 80, no. 6 (2015):819-826,
https://doi.org/10.2298/JSC141225017M . .

TY  - JOUR
AU  - Dikić, Jelena
AU  - Hrenović, Jasna
AU  - Goić-Barisić, Ivana
AU  - Tomić, Miloš
AU  - Đonlagić, Jasna
AU  - Rajić, Nevenka
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2742
AB  - Due to their susceptibility to bacterial biofilm formation, commercial tubes for medical use are one of the main sources of hospital infections with Acinetobacter baumannii. The anti-biofouling activity of novel composites against the clinical isolate of the multi-drug resistant A. baumannii is reported here. The composites were prepared by addition of micronised silver-exchanged natural zeolite (Ag-NZ) into poly(vinyl chloride) (PVC), followed by coating of the composites with D-Tyrosine (D-Tyr). The Ag-NZ composites (containing 1-15 wt% of Ag-NZ) coated with D-Tyr (Ag-NZ-Tyr) showed a bactericidal effect (100% or a 6.9 log CFU reduction) towards immobilised bacterial cells. The uncoated Ag-NZ composites showed a reduction of up to 70% (4.4 log CFU) of immobilised bacteria in comparison with the original PVC. Rheological testing of the composites revealed that the addition of Ag-NZ slightly affected processability and formability of the PVC and increased the elasticity of the polymer matrix.
PB  - Taylor & Francis Ltd, Abingdon
T2  - Biofouling
T1  - Synergistic anti-biofouling effect of Ag-exchanged zeolite and D-Tyrosine on PVC composite against the clinical isolate of Acinetobacter baumannii
EP  - 973
IS  - 8
SP  - 965
VL  - 30
DO  - 10.1080/08927014.2014.959941
ER  - 

@article{
author = "Dikić, Jelena and Hrenović, Jasna and Goić-Barisić, Ivana and Tomić, Miloš and Đonlagić, Jasna and Rajić, Nevenka",
year = "2014",
abstract = "Due to their susceptibility to bacterial biofilm formation, commercial tubes for medical use are one of the main sources of hospital infections with Acinetobacter baumannii. The anti-biofouling activity of novel composites against the clinical isolate of the multi-drug resistant A. baumannii is reported here. The composites were prepared by addition of micronised silver-exchanged natural zeolite (Ag-NZ) into poly(vinyl chloride) (PVC), followed by coating of the composites with D-Tyrosine (D-Tyr). The Ag-NZ composites (containing 1-15 wt% of Ag-NZ) coated with D-Tyr (Ag-NZ-Tyr) showed a bactericidal effect (100% or a 6.9 log CFU reduction) towards immobilised bacterial cells. The uncoated Ag-NZ composites showed a reduction of up to 70% (4.4 log CFU) of immobilised bacteria in comparison with the original PVC. Rheological testing of the composites revealed that the addition of Ag-NZ slightly affected processability and formability of the PVC and increased the elasticity of the polymer matrix.",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "Biofouling",
title = "Synergistic anti-biofouling effect of Ag-exchanged zeolite and D-Tyrosine on PVC composite against the clinical isolate of Acinetobacter baumannii",
pages = "973-965",
number = "8",
volume = "30",
doi = "10.1080/08927014.2014.959941"
}

Dikić, J., Hrenović, J., Goić-Barisić, I., Tomić, M., Đonlagić, J.,& Rajić, N.. (2014). Synergistic anti-biofouling effect of Ag-exchanged zeolite and D-Tyrosine on PVC composite against the clinical isolate of Acinetobacter baumannii. in Biofouling
Taylor & Francis Ltd, Abingdon., 30(8), 965-973.
https://doi.org/10.1080/08927014.2014.959941

Dikić J, Hrenović J, Goić-Barisić I, Tomić M, Đonlagić J, Rajić N. Synergistic anti-biofouling effect of Ag-exchanged zeolite and D-Tyrosine on PVC composite against the clinical isolate of Acinetobacter baumannii. in Biofouling. 2014;30(8):965-973.
doi:10.1080/08927014.2014.959941 .

Dikić, Jelena, Hrenović, Jasna, Goić-Barisić, Ivana, Tomić, Miloš, Đonlagić, Jasna, Rajić, Nevenka, "Synergistic anti-biofouling effect of Ag-exchanged zeolite and D-Tyrosine on PVC composite against the clinical isolate of Acinetobacter baumannii" in Biofouling, 30, no. 8 (2014):965-973,
https://doi.org/10.1080/08927014.2014.959941 . .

TY  - JOUR
AU  - Pavlović, Jelena
AU  - Milenković, Jelena
AU  - Rajić, Nevenka
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2749
AB  - Natural zeolitic tuff from the Zlatokop mine (Vranjska Banja deposit, Serbia) was investigated as the starting material to obtain a low cost adsorbent for the removal of nitrate from aqueous media. The tuff rich in zeolite, clinoptilolite, was modified with several oxides, iron(III), manganese(IV) and magnesium, by simple procedures in order to make the clinoptilolite surface accessible for binding nitrate ions. The obtained oxide-modified zeolite samples were characterized by scanning electron microscopy and energy dispersive X-ray analysis (SEM/EDS), powder X-ray diffraction (PXRD), infrared spectroscopy (FTIR) and by measurement of their specific surface area. The effects of the adsorbent dosage (0.5, 1.0, 1.5 and 2.0 g), temperature (25, 35 and 45 degrees C) and initial nitrate concentration (c(0), 100, 200 and 300 mg dm(-3)) on the binding efficiency were also studied. For all adsorbents, the efficiency increased with temperature. The type of the oxide affected the adsorption mechanism. The Fe(III) oxide-modified zeolite exhibited the best binding ability. For this adsorbent, the adsorption kinetics were studied and it was found that they were best represented by the pseudo-second-order model.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Modification of natural clinoptilolite for nitrate removal from aqueous media
EP  - 1322
IS  - 10
SP  - 1309
VL  - 79
DO  - 10.2298/JSC140116038P
ER  - 

@article{
author = "Pavlović, Jelena and Milenković, Jelena and Rajić, Nevenka",
year = "2014",
abstract = "Natural zeolitic tuff from the Zlatokop mine (Vranjska Banja deposit, Serbia) was investigated as the starting material to obtain a low cost adsorbent for the removal of nitrate from aqueous media. The tuff rich in zeolite, clinoptilolite, was modified with several oxides, iron(III), manganese(IV) and magnesium, by simple procedures in order to make the clinoptilolite surface accessible for binding nitrate ions. The obtained oxide-modified zeolite samples were characterized by scanning electron microscopy and energy dispersive X-ray analysis (SEM/EDS), powder X-ray diffraction (PXRD), infrared spectroscopy (FTIR) and by measurement of their specific surface area. The effects of the adsorbent dosage (0.5, 1.0, 1.5 and 2.0 g), temperature (25, 35 and 45 degrees C) and initial nitrate concentration (c(0), 100, 200 and 300 mg dm(-3)) on the binding efficiency were also studied. For all adsorbents, the efficiency increased with temperature. The type of the oxide affected the adsorption mechanism. The Fe(III) oxide-modified zeolite exhibited the best binding ability. For this adsorbent, the adsorption kinetics were studied and it was found that they were best represented by the pseudo-second-order model.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Modification of natural clinoptilolite for nitrate removal from aqueous media",
pages = "1322-1309",
number = "10",
volume = "79",
doi = "10.2298/JSC140116038P"
}

Pavlović, J., Milenković, J.,& Rajić, N.. (2014). Modification of natural clinoptilolite for nitrate removal from aqueous media. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 79(10), 1309-1322.
https://doi.org/10.2298/JSC140116038P

Pavlović J, Milenković J, Rajić N. Modification of natural clinoptilolite for nitrate removal from aqueous media. in Journal of the Serbian Chemical Society. 2014;79(10):1309-1322.
doi:10.2298/JSC140116038P .

Pavlović, Jelena, Milenković, Jelena, Rajić, Nevenka, "Modification of natural clinoptilolite for nitrate removal from aqueous media" in Journal of the Serbian Chemical Society, 79, no. 10 (2014):1309-1322,
https://doi.org/10.2298/JSC140116038P . .

TY  - JOUR
AU  - Ivanković, Tomislav
AU  - Hrenović, Jasna
AU  - Itskos, Grigorios
AU  - Koukouzas, Nikolaos
AU  - Kovacević, Davor
AU  - Dikić, Jelena
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2708
AB  - Wood fly ash is an industrial by-product of the combustion of different wood materials and is mostly disposed of as waste on landfills. In our preliminary experiments, wood ash exhibited antibacterial activity against urban wastewater bacteria and we focused on wood fly ash as a potential substrate for wastewater disinfection. The addition of ash at a concentration of 10 g L-1 (1 %) caused an instant increase of pH in urban wastewater and landfill leachate. High pH (10.1-12.7) inactivated bacterial populations in the wastewater and the removal of faecal coliforms and intestinal enterococci after 6 h of contact was 100 % (below the detection limit;  lt 1 CFU per mL) with the most efficient ash sample (ash from combustion of beech) both in urban wastewater and landfill leachate. Properly chosen wood fly ash, i.e. one that tends to increase the pH to the greatest extent, proved to be a very effective disinfection substrate. Considering that water treated with wood ash has a high pH and needs to be neutralised before discharge, ash would be suitable for disinfection of leachates when smaller volumes are treated.
PB  - Inst Medical Research & Occupational Health, Zagreb
T2  - Arhiv za higijenu rada i toksikologiju-Archives of Industrial Hygiene and Toxicology
T1  - Alkaline disinfection of urban wastewater and landfill leachate by wood fly ash
EP  - 375
IS  - 4
SP  - 365
VL  - 65
DO  - 10.2478/10004-1254-65-2014-2546
ER  - 

@article{
author = "Ivanković, Tomislav and Hrenović, Jasna and Itskos, Grigorios and Koukouzas, Nikolaos and Kovacević, Davor and Dikić, Jelena",
year = "2014",
abstract = "Wood fly ash is an industrial by-product of the combustion of different wood materials and is mostly disposed of as waste on landfills. In our preliminary experiments, wood ash exhibited antibacterial activity against urban wastewater bacteria and we focused on wood fly ash as a potential substrate for wastewater disinfection. The addition of ash at a concentration of 10 g L-1 (1 %) caused an instant increase of pH in urban wastewater and landfill leachate. High pH (10.1-12.7) inactivated bacterial populations in the wastewater and the removal of faecal coliforms and intestinal enterococci after 6 h of contact was 100 % (below the detection limit;  lt 1 CFU per mL) with the most efficient ash sample (ash from combustion of beech) both in urban wastewater and landfill leachate. Properly chosen wood fly ash, i.e. one that tends to increase the pH to the greatest extent, proved to be a very effective disinfection substrate. Considering that water treated with wood ash has a high pH and needs to be neutralised before discharge, ash would be suitable for disinfection of leachates when smaller volumes are treated.",
publisher = "Inst Medical Research & Occupational Health, Zagreb",
journal = "Arhiv za higijenu rada i toksikologiju-Archives of Industrial Hygiene and Toxicology",
title = "Alkaline disinfection of urban wastewater and landfill leachate by wood fly ash",
pages = "375-365",
number = "4",
volume = "65",
doi = "10.2478/10004-1254-65-2014-2546"
}

Ivanković, T., Hrenović, J., Itskos, G., Koukouzas, N., Kovacević, D.,& Dikić, J.. (2014). Alkaline disinfection of urban wastewater and landfill leachate by wood fly ash. in Arhiv za higijenu rada i toksikologiju-Archives of Industrial Hygiene and Toxicology
Inst Medical Research & Occupational Health, Zagreb., 65(4), 365-375.
https://doi.org/10.2478/10004-1254-65-2014-2546

Ivanković T, Hrenović J, Itskos G, Koukouzas N, Kovacević D, Dikić J. Alkaline disinfection of urban wastewater and landfill leachate by wood fly ash. in Arhiv za higijenu rada i toksikologiju-Archives of Industrial Hygiene and Toxicology. 2014;65(4):365-375.
doi:10.2478/10004-1254-65-2014-2546 .

Ivanković, Tomislav, Hrenović, Jasna, Itskos, Grigorios, Koukouzas, Nikolaos, Kovacević, Davor, Dikić, Jelena, "Alkaline disinfection of urban wastewater and landfill leachate by wood fly ash" in Arhiv za higijenu rada i toksikologiju-Archives of Industrial Hygiene and Toxicology, 65, no. 4 (2014):365-375,
https://doi.org/10.2478/10004-1254-65-2014-2546 . .

TY  - JOUR
AU  - Hrenović, Jasna
AU  - Milenković, Jelena
AU  - Goić-Barisić, Ivana
AU  - Rajić, Nevenka
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2488
AB  - The antibacterial activity of natural zeolite (NZ) containing 2.03 wt.% of Cu2+ (CuNZ), 5.07 of Ag+ (AgNZ) or 8.50 of benzalkonium ion (BCNZ) were tested against clinical isolates of Acinetobacter baumannii belonging to European clone I and II. Isolate from clone II was more sensitive to CuNZ and AgNZ with minimum bactericidal concentration (MBC) 125 and 31.2 mg L-1, respectively than isolate from clone I with MBC of 250 mg L-1 for both CuNZ and AgNZ. Isolate from clone I was more sensitive to BCNZ with MBC 250 mg L-1 than isolate from clone II with MBC 500 mg L-1. The minimum inhibitory concentration (MIC) values were the same or slightly lower than the MBC values. The antibacterial activity of CuNZ, AgNZ and BCNZ against the A. baumannii European clone I and II was due to the activity of cations loaded onto NZ while not to the NZ used as support material. The antibacterial activity of CuNZ, AgNZ and BCNZ opens a possibility of future clinical investigations and its application.
PB  - Elsevier, Amsterdam
T2  - Microporous and Mesoporous Materials
T1  - Antibacterial activity of modified natural clinoptilolite against clinical isolates of Acinetobacter baumannii
EP  - 152
SP  - 148
VL  - 169
DO  - 10.1016/j.micromeso.2012.10.026
ER  - 

@article{
author = "Hrenović, Jasna and Milenković, Jelena and Goić-Barisić, Ivana and Rajić, Nevenka",
year = "2013",
abstract = "The antibacterial activity of natural zeolite (NZ) containing 2.03 wt.% of Cu2+ (CuNZ), 5.07 of Ag+ (AgNZ) or 8.50 of benzalkonium ion (BCNZ) were tested against clinical isolates of Acinetobacter baumannii belonging to European clone I and II. Isolate from clone II was more sensitive to CuNZ and AgNZ with minimum bactericidal concentration (MBC) 125 and 31.2 mg L-1, respectively than isolate from clone I with MBC of 250 mg L-1 for both CuNZ and AgNZ. Isolate from clone I was more sensitive to BCNZ with MBC 250 mg L-1 than isolate from clone II with MBC 500 mg L-1. The minimum inhibitory concentration (MIC) values were the same or slightly lower than the MBC values. The antibacterial activity of CuNZ, AgNZ and BCNZ against the A. baumannii European clone I and II was due to the activity of cations loaded onto NZ while not to the NZ used as support material. The antibacterial activity of CuNZ, AgNZ and BCNZ opens a possibility of future clinical investigations and its application.",
publisher = "Elsevier, Amsterdam",
journal = "Microporous and Mesoporous Materials",
title = "Antibacterial activity of modified natural clinoptilolite against clinical isolates of Acinetobacter baumannii",
pages = "152-148",
volume = "169",
doi = "10.1016/j.micromeso.2012.10.026"
}

Hrenović, J., Milenković, J., Goić-Barisić, I.,& Rajić, N.. (2013). Antibacterial activity of modified natural clinoptilolite against clinical isolates of Acinetobacter baumannii. in Microporous and Mesoporous Materials
Elsevier, Amsterdam., 169, 148-152.
https://doi.org/10.1016/j.micromeso.2012.10.026

Hrenović J, Milenković J, Goić-Barisić I, Rajić N. Antibacterial activity of modified natural clinoptilolite against clinical isolates of Acinetobacter baumannii. in Microporous and Mesoporous Materials. 2013;169:148-152.
doi:10.1016/j.micromeso.2012.10.026 .

Hrenović, Jasna, Milenković, Jelena, Goić-Barisić, Ivana, Rajić, Nevenka, "Antibacterial activity of modified natural clinoptilolite against clinical isolates of Acinetobacter baumannii" in Microporous and Mesoporous Materials, 169 (2013):148-152,
https://doi.org/10.1016/j.micromeso.2012.10.026 . .

TY  - JOUR
AU  - Hrenović, Jasna
AU  - Dikić, Jelena
AU  - Daneu, Nina
AU  - Kepcija, Renata Matonickin
AU  - Rajić, Nevenka
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2138
AB  - The antimicrobial activity of Cu2O, ZnO and NiO nanoparticles supported onto natural clinoptilolite was investigated in the secondary effluent under dark conditions. After 24 h of contact the Cu2O and ZnO nanoparticles reduced the numbers of viable bacterial cells of Escherichia coli and Staphylococcus aureus in pure culture for four to six orders of magnitude and showed consistent 100% of antibacterial activity against native E. coli after 1 h of contact during 48 exposures. The antibacterial activity of NiO nanoparticles was less efficient. The Cu2O and NiO nanoparticles showed 100% of antiprotozoan activity against Paramecium caudatum and Euplotes affinis after 1 h of contact, while ZnO nanoparticles were less efficient. The morphology and crystallinity of the nanoparticles were not affected by microorganisms. The metal oxide nanoparticles could find a novel application in the disinfection of secondary effluent and removal of pathogenic microorganisms in the tertiary stage of wastewater treatment.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Chemosphere
T1  - Antimicrobial activity of metal oxide nanoparticles supported onto natural clinoptilolite
EP  - 1107
IS  - 9
SP  - 1103
VL  - 88
DO  - 10.1016/j.chemosphere.2012.05.023
ER  - 

@article{
author = "Hrenović, Jasna and Dikić, Jelena and Daneu, Nina and Kepcija, Renata Matonickin and Rajić, Nevenka",
year = "2012",
abstract = "The antimicrobial activity of Cu2O, ZnO and NiO nanoparticles supported onto natural clinoptilolite was investigated in the secondary effluent under dark conditions. After 24 h of contact the Cu2O and ZnO nanoparticles reduced the numbers of viable bacterial cells of Escherichia coli and Staphylococcus aureus in pure culture for four to six orders of magnitude and showed consistent 100% of antibacterial activity against native E. coli after 1 h of contact during 48 exposures. The antibacterial activity of NiO nanoparticles was less efficient. The Cu2O and NiO nanoparticles showed 100% of antiprotozoan activity against Paramecium caudatum and Euplotes affinis after 1 h of contact, while ZnO nanoparticles were less efficient. The morphology and crystallinity of the nanoparticles were not affected by microorganisms. The metal oxide nanoparticles could find a novel application in the disinfection of secondary effluent and removal of pathogenic microorganisms in the tertiary stage of wastewater treatment.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Chemosphere",
title = "Antimicrobial activity of metal oxide nanoparticles supported onto natural clinoptilolite",
pages = "1107-1103",
number = "9",
volume = "88",
doi = "10.1016/j.chemosphere.2012.05.023"
}

Hrenović, J., Dikić, J., Daneu, N., Kepcija, R. M.,& Rajić, N.. (2012). Antimicrobial activity of metal oxide nanoparticles supported onto natural clinoptilolite. in Chemosphere
Pergamon-Elsevier Science Ltd, Oxford., 88(9), 1103-1107.
https://doi.org/10.1016/j.chemosphere.2012.05.023

Hrenović J, Dikić J, Daneu N, Kepcija RM, Rajić N. Antimicrobial activity of metal oxide nanoparticles supported onto natural clinoptilolite. in Chemosphere. 2012;88(9):1103-1107.
doi:10.1016/j.chemosphere.2012.05.023 .

Hrenović, Jasna, Dikić, Jelena, Daneu, Nina, Kepcija, Renata Matonickin, Rajić, Nevenka, "Antimicrobial activity of metal oxide nanoparticles supported onto natural clinoptilolite" in Chemosphere, 88, no. 9 (2012):1103-1107,
https://doi.org/10.1016/j.chemosphere.2012.05.023 . .

TY  - JOUR
AU  - Hrenović, Jasna
AU  - Dikić, Jelena
AU  - Ivanković, Tomislav
AU  - Rajić, Nevenka
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2226
AB  - The antibacterial activity of natural zeolitized tuffs containing 2.60 wt.% Cu2+, 1.47 Zn2+ or 0.52 Ni2+ were tested. Antibacterial activities of the zeolites against Escherichia coli and Staphylococcus aureus were tested after 1 h and 24 h of exposure to 1 g of the zeolite in 100 mL of three different media, namely Luria Bertani, synthetic wastewater and secondary effluent wastewater. The antibacterial activities of the zeolites in Luria Bertani medium were significantly lower than those in the other media and negatively correlated with the chemical oxygen demand of the media. The Ni-loaded zeolite showed high leaching of Ni2+ (3.44-9.13 wt.% of the Ni2+ loaded) and weak antibacterial activity in the effluent water. Since Cu-loaded zeolite did not leach Cu2+ and the leaching of Zn2+ from Zn-loaded zeolite was low (1.07-1.61 wt.% of the Zn2+ loaded), the strong antibacterial activity classified the Cu- and Zn-loaded zeolite as promising antibacterial materials for disinfection of secondary effluent water.
PB  - Elsevier Science Bv, Amsterdam
T2  - Journal of Hazardous Materials
T1  - Antibacterial activity of heavy metal-loaded natural zeolite
EP  - 264
SP  - 260
VL  - 201
DO  - 10.1016/j.jhazmat.2011.11.079
ER  - 

@article{
author = "Hrenović, Jasna and Dikić, Jelena and Ivanković, Tomislav and Rajić, Nevenka",
year = "2012",
abstract = "The antibacterial activity of natural zeolitized tuffs containing 2.60 wt.% Cu2+, 1.47 Zn2+ or 0.52 Ni2+ were tested. Antibacterial activities of the zeolites against Escherichia coli and Staphylococcus aureus were tested after 1 h and 24 h of exposure to 1 g of the zeolite in 100 mL of three different media, namely Luria Bertani, synthetic wastewater and secondary effluent wastewater. The antibacterial activities of the zeolites in Luria Bertani medium were significantly lower than those in the other media and negatively correlated with the chemical oxygen demand of the media. The Ni-loaded zeolite showed high leaching of Ni2+ (3.44-9.13 wt.% of the Ni2+ loaded) and weak antibacterial activity in the effluent water. Since Cu-loaded zeolite did not leach Cu2+ and the leaching of Zn2+ from Zn-loaded zeolite was low (1.07-1.61 wt.% of the Zn2+ loaded), the strong antibacterial activity classified the Cu- and Zn-loaded zeolite as promising antibacterial materials for disinfection of secondary effluent water.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of Hazardous Materials",
title = "Antibacterial activity of heavy metal-loaded natural zeolite",
pages = "264-260",
volume = "201",
doi = "10.1016/j.jhazmat.2011.11.079"
}

Hrenović, J., Dikić, J., Ivanković, T.,& Rajić, N.. (2012). Antibacterial activity of heavy metal-loaded natural zeolite. in Journal of Hazardous Materials
Elsevier Science Bv, Amsterdam., 201, 260-264.
https://doi.org/10.1016/j.jhazmat.2011.11.079

Hrenović J, Dikić J, Ivanković T, Rajić N. Antibacterial activity of heavy metal-loaded natural zeolite. in Journal of Hazardous Materials. 2012;201:260-264.
doi:10.1016/j.jhazmat.2011.11.079 .

Hrenović, Jasna, Dikić, Jelena, Ivanković, Tomislav, Rajić, Nevenka, "Antibacterial activity of heavy metal-loaded natural zeolite" in Journal of Hazardous Materials, 201 (2012):260-264,
https://doi.org/10.1016/j.jhazmat.2011.11.079 . .

TY  - JOUR
AU  - Stojaković, Đorđe
AU  - Dikić, Jelena
AU  - Daneu, Nina
AU  - Rajić, Nevenka
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1919
AB  - Toxic metal contamination of waste waters can be mitigated by metal adsorption to clay and zeolitic minerals, but in developing countries such environmental remediation can be cost prohibitive if these minerals are not readily available. Because of its abundance, low cost, and excellent selectivity for several toxic metal ions, clinoptilolite from the Zlatokop deposit in Serbia was investigated for its ability to remove copper ions from aqueous solutions and serve as an effective local resource for this purpose. The sorption capacity of the clinoptilolite at 298 K varied from 8.3 mg Cu g(-1) (for C-0 = 100 mg Cu dm(-3)) to 16.8 mg Cu g(-1) (for C-0 = 400 mg Cu dm-3). The sorption data were best described by the Freundlich isotherm and the sorption kinetics followed the pseudo-second-order model. Intra-particle diffusion of Cu2+ was present but it is not the rate-limiting step. The sorption of Cu2+ on the clinoptilolite occurred spontaneously, the free energy change decreasing with temperature. The sorption was endothermic and was accompanied by an increase in entropy. Dehydration of the Cu-loaded clinoptilolite at 540 degrees C led to the formation of nanocrystallinc Cu(I) oxide particles with an average size of similar to 2 nm, suggesting possible novel applications for the Cu-loaded clinoptilolite.
PB  - Springer, New York
T2  - Clays and Clay Minerals
T1  - A study of the removal of copper ions from aqueous solution using clinoptilolite from Serbia
EP  - 285
IS  - 3
SP  - 277
VL  - 59
DO  - 10.1346/CCMN.2011.0590305
ER  - 

@article{
author = "Stojaković, Đorđe and Dikić, Jelena and Daneu, Nina and Rajić, Nevenka",
year = "2011",
abstract = "Toxic metal contamination of waste waters can be mitigated by metal adsorption to clay and zeolitic minerals, but in developing countries such environmental remediation can be cost prohibitive if these minerals are not readily available. Because of its abundance, low cost, and excellent selectivity for several toxic metal ions, clinoptilolite from the Zlatokop deposit in Serbia was investigated for its ability to remove copper ions from aqueous solutions and serve as an effective local resource for this purpose. The sorption capacity of the clinoptilolite at 298 K varied from 8.3 mg Cu g(-1) (for C-0 = 100 mg Cu dm(-3)) to 16.8 mg Cu g(-1) (for C-0 = 400 mg Cu dm-3). The sorption data were best described by the Freundlich isotherm and the sorption kinetics followed the pseudo-second-order model. Intra-particle diffusion of Cu2+ was present but it is not the rate-limiting step. The sorption of Cu2+ on the clinoptilolite occurred spontaneously, the free energy change decreasing with temperature. The sorption was endothermic and was accompanied by an increase in entropy. Dehydration of the Cu-loaded clinoptilolite at 540 degrees C led to the formation of nanocrystallinc Cu(I) oxide particles with an average size of similar to 2 nm, suggesting possible novel applications for the Cu-loaded clinoptilolite.",
publisher = "Springer, New York",
journal = "Clays and Clay Minerals",
title = "A study of the removal of copper ions from aqueous solution using clinoptilolite from Serbia",
pages = "285-277",
number = "3",
volume = "59",
doi = "10.1346/CCMN.2011.0590305"
}

Stojaković, Đ., Dikić, J., Daneu, N.,& Rajić, N.. (2011). A study of the removal of copper ions from aqueous solution using clinoptilolite from Serbia. in Clays and Clay Minerals
Springer, New York., 59(3), 277-285.
https://doi.org/10.1346/CCMN.2011.0590305

Stojaković Đ, Dikić J, Daneu N, Rajić N. A study of the removal of copper ions from aqueous solution using clinoptilolite from Serbia. in Clays and Clay Minerals. 2011;59(3):277-285.
doi:10.1346/CCMN.2011.0590305 .

Stojaković, Đorđe, Dikić, Jelena, Daneu, Nina, Rajić, Nevenka, "A study of the removal of copper ions from aqueous solution using clinoptilolite from Serbia" in Clays and Clay Minerals, 59, no. 3 (2011):277-285,
https://doi.org/10.1346/CCMN.2011.0590305 . .