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 . .