TY  - CONF
AU  - Dimitrijević, Jelena
AU  - Jevtić, Sanja
AU  - Koprivica, Marija
AU  - Marinković, Aleksandar
AU  - Simić, Marija
AU  - Petrović, Jelena
PY  - 2024
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1239
AB  - U ovom istraživanju, ispitivana je sposobnost otpadne biomase kao adsorbenta, pri čemu je ovsena slama (OS) odabrana kao polazna sirovina. Da bi se unapredio kapacitet adsorpcije ovog materijala, on je modifikovan sa odabranim dubokim eutektičkim rastvaračem (DES). Radi proširenja mogućnosti primene nakon tretmana sa DES-om, modifikovana ovsena slama (DOS) je imobilisana u kuglice sa alginatom, te je time dobijen IDOS. Efikasnost adsorpcije teških metalnih jona metala iz rastvora bakra testirana je na modifikovanoj (ili imobilisanoj) ovsenoj slami. Maksimalni dobijeni kapaciteti za adsorpciju jona bakra bili su 26.4, 81.4, 124.78 mg/g respektivno. Dobijeni rezultati pokazali su da adsorpcija prati kinetički model pseudo-drugog reda, što implicira da je hemisorpcija za vezivanje jona bakra, odnosno korak koji kontroliše brzinu adsorpcije.
PB  - Novi Sad : Prirodno-matematički fakultet
C3  - "11. Memorijalni naučni skup iz zaštite životne sredine „Docent dr Milena Dalmacija“ "
T1  - Imobilisana otpadna ovsena slama kao efikasan adsorbent jona bakra
ER  - 

@conference{
author = "Dimitrijević, Jelena and Jevtić, Sanja and Koprivica, Marija and Marinković, Aleksandar and Simić, Marija and Petrović, Jelena",
year = "2024",
abstract = "U ovom istraživanju, ispitivana je sposobnost otpadne biomase kao adsorbenta, pri čemu je ovsena slama (OS) odabrana kao polazna sirovina. Da bi se unapredio kapacitet adsorpcije ovog materijala, on je modifikovan sa odabranim dubokim eutektičkim rastvaračem (DES). Radi proširenja mogućnosti primene nakon tretmana sa DES-om, modifikovana ovsena slama (DOS) je imobilisana u kuglice sa alginatom, te je time dobijen IDOS. Efikasnost adsorpcije teških metalnih jona metala iz rastvora bakra testirana je na modifikovanoj (ili imobilisanoj) ovsenoj slami. Maksimalni dobijeni kapaciteti za adsorpciju jona bakra bili su 26.4, 81.4, 124.78 mg/g respektivno. Dobijeni rezultati pokazali su da adsorpcija prati kinetički model pseudo-drugog reda, što implicira da je hemisorpcija za vezivanje jona bakra, odnosno korak koji kontroliše brzinu adsorpcije.",
publisher = "Novi Sad : Prirodno-matematički fakultet",
journal = ""11. Memorijalni naučni skup iz zaštite životne sredine „Docent dr Milena Dalmacija“ "",
title = "Imobilisana otpadna ovsena slama kao efikasan adsorbent jona bakra"
}

Dimitrijević, J., Jevtić, S., Koprivica, M., Marinković, A., Simić, M.,& Petrović, J.. (2024). Imobilisana otpadna ovsena slama kao efikasan adsorbent jona bakra. in "11. Memorijalni naučni skup iz zaštite životne sredine „Docent dr Milena Dalmacija“ "
Novi Sad : Prirodno-matematički fakultet..

Dimitrijević J, Jevtić S, Koprivica M, Marinković A, Simić M, Petrović J. Imobilisana otpadna ovsena slama kao efikasan adsorbent jona bakra. in "11. Memorijalni naučni skup iz zaštite životne sredine „Docent dr Milena Dalmacija“ ". 2024;..

Dimitrijević, Jelena, Jevtić, Sanja, Koprivica, Marija, Marinković, Aleksandar, Simić, Marija, Petrović, Jelena, "Imobilisana otpadna ovsena slama kao efikasan adsorbent jona bakra" in "11. Memorijalni naučni skup iz zaštite životne sredine „Docent dr Milena Dalmacija“ " (2024).

TY  - CONF
AU  - Dimitrijević, Jelena
AU  - Jevtić, Sanja
AU  - Petrović, Jelena
AU  - Koprivica, Marija
AU  - Kovačina, Jovanka
AU  - Marinković, Aleksandar
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/874
AB  - U ovom radu proučavana je primena adsorbenasa na bazi modifikovanog
sintetskog zeolita - mordenita za uklanjanje jona Cu 2+ i Pb 2+ iz vodenih rastvora. U
cilju poboljšavanja njegovih adsorpcionih svojstava zeolit je modifikovan
korišćenjem (3-aminopropil)trietoksisilana. Preliminarni rezultati pokazali su da
modifikovani mordenit postiže adsorpcioni kapacitet od 21,0 i 63,2 mg/g za Cu 2+ i
Pb 2+ , redom. Adsorpcija oba jona prati kinetiku modela pseudo-drugog reda. Ovaj
model podrazumeva hemijsku interakciju između jona metala i funkcionalnih
grupa na površini silanizovanog mordenita. Dobijeni rezultati ukazuju da je
mordenit modifikovan silanima pogodan adsorbens za potencijalno uklanjanje
jona teških metala iz otpadnih voda.
PB  - Beograd : Srpsko društvo za zaštitu voda
C3  - Voda2021
T1  - Modifikovani sintetski zeolit - mordenit kao adsorbens Cu 2+ i Pb 2+ jona iz vodenih rastvora
EP  - 358
SP  - 353
ER  - 

@conference{
author = "Dimitrijević, Jelena and Jevtić, Sanja and Petrović, Jelena and Koprivica, Marija and Kovačina, Jovanka and Marinković, Aleksandar",
year = "2021",
abstract = "U ovom radu proučavana je primena adsorbenasa na bazi modifikovanog
sintetskog zeolita - mordenita za uklanjanje jona Cu 2+ i Pb 2+ iz vodenih rastvora. U
cilju poboljšavanja njegovih adsorpcionih svojstava zeolit je modifikovan
korišćenjem (3-aminopropil)trietoksisilana. Preliminarni rezultati pokazali su da
modifikovani mordenit postiže adsorpcioni kapacitet od 21,0 i 63,2 mg/g za Cu 2+ i
Pb 2+ , redom. Adsorpcija oba jona prati kinetiku modela pseudo-drugog reda. Ovaj
model podrazumeva hemijsku interakciju između jona metala i funkcionalnih
grupa na površini silanizovanog mordenita. Dobijeni rezultati ukazuju da je
mordenit modifikovan silanima pogodan adsorbens za potencijalno uklanjanje
jona teških metala iz otpadnih voda.",
publisher = "Beograd : Srpsko društvo za zaštitu voda",
journal = "Voda2021",
title = "Modifikovani sintetski zeolit - mordenit kao adsorbens Cu 2+ i Pb 2+ jona iz vodenih rastvora",
pages = "358-353"
}

Dimitrijević, J., Jevtić, S., Petrović, J., Koprivica, M., Kovačina, J.,& Marinković, A.. (2021). Modifikovani sintetski zeolit - mordenit kao adsorbens Cu 2+ i Pb 2+ jona iz vodenih rastvora. in Voda2021
Beograd : Srpsko društvo za zaštitu voda., 353-358.

Dimitrijević J, Jevtić S, Petrović J, Koprivica M, Kovačina J, Marinković A. Modifikovani sintetski zeolit - mordenit kao adsorbens Cu 2+ i Pb 2+ jona iz vodenih rastvora. in Voda2021. 2021;:353-358..

Dimitrijević, Jelena, Jevtić, Sanja, Petrović, Jelena, Koprivica, Marija, Kovačina, Jovanka, Marinković, Aleksandar, "Modifikovani sintetski zeolit - mordenit kao adsorbens Cu 2+ i Pb 2+ jona iz vodenih rastvora" in Voda2021 (2021):353-358.

TY  - CONF
AU  - Sokić, Katarina
AU  - Veljović, Đorđe
AU  - Dikić, Jelena
AU  - Stojanović, Jovica
AU  - Smiljanić, Danijela
AU  - Jevtić, Sanja
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/728
AB  - The aim of this study was to investigate the possibilities and to optimize the conditions for the synthesis of hydroxyapatite (HAP) on calcium-enriched natural and synthetic zeolites as carriers. Two synthetic zeolites were used in the paper: zeolite 4A (Na-form) and zeolite 5A (Ca-form) as well as natural zeolite - clinoptilolite from Slanci deposit in Serbia.
Clinoptilolite and zeolite 4A were enriched with calcium ions by ion exchange treatmentin order to enable the source of Ca2+in the crystallization of hydroxyapatite. Phosphorus, necessary for the crystallization of hydroxyapatite, was introduced through a solution of ammonium-hydrogenphosphate. The influence of the concentration of hydrogen phosphate ions, temperature and crystallization time of hydroxyapatite on the morphology of the zeolite surface as well as the degree of its coverage with newly formed hydroxyapatite particles was monitored in the experiments. The obtained powders were characterized by X-ray powder diffraction (XRD), thermal TG-DTG analysis, infrared spectroscopy with Fourier transformation (FTIR) and scanning electron microscopy (SEM). Based on the structural analysis, it was shown that the synthesis of hydroxyapatite did not affect on the structure of the zeolite, except in the case when a very concentrated hydrogen-phosphate solution was used. Thermal analysis showed that all obtained zeolite and HAP samples were stable up to 800 °C. Optimization of the hydrothermal crystallization process showed that temperature and time do not have a crucial influence on the synthesis of the materials (similar results were obtained at 120 °C for 20 hours and at 160 °C for 4 hours). When the concentration of the solution of ammonium hydrogen phosphate was higher, larger crystals of hydroxyapatite were obtained, but the crystal lattice of the zeolite was collapsed. SEM micrography showed that unevenly distributed hydroxyapatite crystals were formed on natural zeolite due to the presence of various impurities, while the best results were achieved using zeolite 5A, where
the surface of the zeolite is completely covered with crystals of hydroxyapatite.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Nineteenth Young Researchers’ Conference - Materials Science and Engineering
T1  - Hydrothermal synthesis of hydroxyapatite on calcium-enriched natural and synthetic zeolite as a carrier
EP  - 75
SP  - 75
ER  - 

@conference{
author = "Sokić, Katarina and Veljović, Đorđe and Dikić, Jelena and Stojanović, Jovica and Smiljanić, Danijela and Jevtić, Sanja",
year = "2021",
abstract = "The aim of this study was to investigate the possibilities and to optimize the conditions for the synthesis of hydroxyapatite (HAP) on calcium-enriched natural and synthetic zeolites as carriers. Two synthetic zeolites were used in the paper: zeolite 4A (Na-form) and zeolite 5A (Ca-form) as well as natural zeolite - clinoptilolite from Slanci deposit in Serbia.
Clinoptilolite and zeolite 4A were enriched with calcium ions by ion exchange treatmentin order to enable the source of Ca2+in the crystallization of hydroxyapatite. Phosphorus, necessary for the crystallization of hydroxyapatite, was introduced through a solution of ammonium-hydrogenphosphate. The influence of the concentration of hydrogen phosphate ions, temperature and crystallization time of hydroxyapatite on the morphology of the zeolite surface as well as the degree of its coverage with newly formed hydroxyapatite particles was monitored in the experiments. The obtained powders were characterized by X-ray powder diffraction (XRD), thermal TG-DTG analysis, infrared spectroscopy with Fourier transformation (FTIR) and scanning electron microscopy (SEM). Based on the structural analysis, it was shown that the synthesis of hydroxyapatite did not affect on the structure of the zeolite, except in the case when a very concentrated hydrogen-phosphate solution was used. Thermal analysis showed that all obtained zeolite and HAP samples were stable up to 800 °C. Optimization of the hydrothermal crystallization process showed that temperature and time do not have a crucial influence on the synthesis of the materials (similar results were obtained at 120 °C for 20 hours and at 160 °C for 4 hours). When the concentration of the solution of ammonium hydrogen phosphate was higher, larger crystals of hydroxyapatite were obtained, but the crystal lattice of the zeolite was collapsed. SEM micrography showed that unevenly distributed hydroxyapatite crystals were formed on natural zeolite due to the presence of various impurities, while the best results were achieved using zeolite 5A, where
the surface of the zeolite is completely covered with crystals of hydroxyapatite.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Nineteenth Young Researchers’ Conference - Materials Science and Engineering",
title = "Hydrothermal synthesis of hydroxyapatite on calcium-enriched natural and synthetic zeolite as a carrier",
pages = "75-75"
}

Sokić, K., Veljović, Đ., Dikić, J., Stojanović, J., Smiljanić, D.,& Jevtić, S.. (2021). Hydrothermal synthesis of hydroxyapatite on calcium-enriched natural and synthetic zeolite as a carrier. in Nineteenth Young Researchers’ Conference - Materials Science and Engineering
Belgrade : Institute of Technical Sciences of SASA., 75-75.

Sokić K, Veljović Đ, Dikić J, Stojanović J, Smiljanić D, Jevtić S. Hydrothermal synthesis of hydroxyapatite on calcium-enriched natural and synthetic zeolite as a carrier. in Nineteenth Young Researchers’ Conference - Materials Science and Engineering. 2021;:75-75..

Sokić, Katarina, Veljović, Đorđe, Dikić, Jelena, Stojanović, Jovica, Smiljanić, Danijela, Jevtić, Sanja, "Hydrothermal synthesis of hydroxyapatite on calcium-enriched natural and synthetic zeolite as a carrier" in Nineteenth Young Researchers’ Conference - Materials Science and Engineering (2021):75-75.