TY  - JOUR
AU  - Matijašević, Srđan D.
AU  - Grujić, Snežana R.
AU  - Topalović, Vladimir S.
AU  - Nikolić, Jelena D.
AU  - Smiljanić, Sonja V.
AU  - Labus, Nebojša
AU  - Savić, Veljko V.
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/3747
AB  - Crystallization kinetics of 22.5Li2O•10Al2O3 •30GeO2•37.5P2 O5 (mol%) glass was studied under non-isothermal condition using the differential thermal analysis (DTA). The study was performed by using the first crystallization peak temperature (Tp1) which belongs to the precipitation of LiGe2 (PO4)3 phase in the glass. The activation energy of glass crystallization (Ea) was determined using different isokinetic methods. The dependence of Ea on the degree of glass-crystal transformation (α) was studied using model-free isoconversional linear integral KAS (Kissinger–Akahira–Sunose) and FWO (Flynn–Wall– Ozawa) methods. It was shown that the Ea varies with α and hence with temperature and consequently the glass/crystal transformation can be described as a complex process involving different mechanisms of nucleation and growth. © 2016 Authors. Published by the International Institute for the Science of Sintering.
PB  - Belgrade : International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Non-isothermal crystallization of lithium germanophosphate glass studied by different kinetic methods
SP  - 193
EP  - 203
VL  - 50
IS  - 2
DO  - 10.2298/SOS1802193M
UR  - https://hdl.handle.net/21.15107/rcub_dais_3747
ER  - 

@article{
author = "Matijašević, Srđan D. and Grujić, Snežana R. and Topalović, Vladimir S. and Nikolić, Jelena D. and Smiljanić, Sonja V. and Labus, Nebojša and Savić, Veljko V.",
year = "2018",
abstract = "Crystallization kinetics of 22.5Li2O•10Al2O3 •30GeO2•37.5P2 O5 (mol%) glass was studied under non-isothermal condition using the differential thermal analysis (DTA). The study was performed by using the first crystallization peak temperature (Tp1) which belongs to the precipitation of LiGe2 (PO4)3 phase in the glass. The activation energy of glass crystallization (Ea) was determined using different isokinetic methods. The dependence of Ea on the degree of glass-crystal transformation (α) was studied using model-free isoconversional linear integral KAS (Kissinger–Akahira–Sunose) and FWO (Flynn–Wall– Ozawa) methods. It was shown that the Ea varies with α and hence with temperature and consequently the glass/crystal transformation can be described as a complex process involving different mechanisms of nucleation and growth. © 2016 Authors. Published by the International Institute for the Science of Sintering.",
publisher = "Belgrade : International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Non-isothermal crystallization of lithium germanophosphate glass studied by different kinetic methods",
pages = "193-203",
volume = "50",
number = "2",
doi = "10.2298/SOS1802193M",
url = "https://hdl.handle.net/21.15107/rcub_dais_3747"
}

Matijašević, S. D., Grujić, S. R., Topalović, V. S., Nikolić, J. D., Smiljanić, S. V., Labus, N.,& Savić, V. V.. (2018). Non-isothermal crystallization of lithium germanophosphate glass studied by different kinetic methods. in Science of Sintering
Belgrade : International Institute for the Science of Sintering., 50(2), 193-203.
https://doi.org/10.2298/SOS1802193M
https://hdl.handle.net/21.15107/rcub_dais_3747

Matijašević SD, Grujić SR, Topalović VS, Nikolić JD, Smiljanić SV, Labus N, Savić VV. Non-isothermal crystallization of lithium germanophosphate glass studied by different kinetic methods. in Science of Sintering. 2018;50(2):193-203.
doi:10.2298/SOS1802193M
https://hdl.handle.net/21.15107/rcub_dais_3747 .

Matijašević, Srđan D., Grujić, Snežana R., Topalović, Vladimir S., Nikolić, Jelena D., Smiljanić, Sonja V., Labus, Nebojša, Savić, Veljko V., "Non-isothermal crystallization of lithium germanophosphate glass studied by different kinetic methods" in Science of Sintering, 50, no. 2 (2018):193-203,
https://doi.org/10.2298/SOS1802193M .,
https://hdl.handle.net/21.15107/rcub_dais_3747 .

TY  - JOUR
AU  - Matijašević, Srđan
AU  - Zildžović, Snežana
AU  - Stojanović, Jovica
AU  - Đošić, Marija
AU  - Nikolić, Jelena
AU  - Stojanović, Mirjana
AU  - Labus, Nebojša
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/899
AB  - Cilj ovog rada je prikaz mogućnosti primene prirodnog i modifikovanog zeolitskog minerala kao adsorbenta i materijala za sanaciju voda kontaminiranih uranijum jonom. Modifikovani uzorci zeolita dobijeni su tretiranjem prirodnog zeolita - klinoptilolita sa kiselinama: hlorovodoničnom, oksalnom i limunskom. Polazni i modifikovani zeoliti su okarakterisani hemijskom analizom, skenirajućom elektronskom mikroskopijom (SEM), rendgenskom analizom (XRPD), IC spektroskopijom, termičkom (TG/DTA) analizom i određivanjem kapaciteta katjonske izmene, a polazne i neadsorbovane količine uranijum jona su određene fluorimetrijski. Eksperimenti su sprovedeni da se ispita uticaj odnosa čvrsto/tečno, pH i vremena na adsorpciju uranijum jona na zeolitu. Utvrđeno je da tretman sa kiselinama zeolita povećava adsorpciju uranijum jona. Najviši indeks adsorpcije imao je uzorak zeolita modifikovan sa hlorovodoničnom kiselinom. Dobijeni rezultati adsorpcije na H-zeolitu su izračunati prema Langmirovom modelu.

Projekat MPNTR, br. 142057
Razvoj stakala sa kontrolisanim otpuštanjem jona za primenu u poljoprivredi i medicini (MPNTR - 34001)
AB  - The objective of this study was the review of natural zeolite, modified with acid, as a candidate material for the remediation of groundwater contaminated by uranium(VI). The modified zeolite samples were obtained by treatment of natural zeolite - clinoptilolite with acids: hydrochloric, oxalyc and citric. Starting and modified zeolites were characterized by chemical analysis, SEM, XRPD analysis, IR spectroscopy, thermal (TG/DT) analysis and by determination of cation exchange capacity, while starting and nonadsorbed amounts of uranium(VI) ion were determined by fluorometric method. Batch experiments were conducted to investigate the effect of solid/liquid ratio, pH and time on the U(VI) uptake by zeolite. Modification of zeolitic tuff with acids significantly increased adsorption of uranium(VI). The highest adsorption of uranium(VI) ion was achieved on clinoptilolite modified with hydrochloric acid. Uranium(VI) adsorption data for zeolite modified with hydrochloric acid was fitted to the Langmuir model.

Projekat MPNTR, br. 142057
The development of glasses with controlled ions release for application in agriculture and medicine (MESTD - 34001)
T2  - Zaštita materijala
T1  - Uklanjanje uranil-jona iz rastvora kiselo tretiranim zeolitima
SP  - 551
EP  - 558
VL  - 57
IS  - 4
DO  - 10.5937/ZasMat1604551M
UR  - https://hdl.handle.net/21.15107/rcub_dais_899
ER  - 

@article{
author = "Matijašević, Srđan and Zildžović, Snežana and Stojanović, Jovica and Đošić, Marija and Nikolić, Jelena and Stojanović, Mirjana and Labus, Nebojša",
year = "2016",
abstract = "Cilj ovog rada je prikaz mogućnosti primene prirodnog i modifikovanog zeolitskog minerala kao adsorbenta i materijala za sanaciju voda kontaminiranih uranijum jonom. Modifikovani uzorci zeolita dobijeni su tretiranjem prirodnog zeolita - klinoptilolita sa kiselinama: hlorovodoničnom, oksalnom i limunskom. Polazni i modifikovani zeoliti su okarakterisani hemijskom analizom, skenirajućom elektronskom mikroskopijom (SEM), rendgenskom analizom (XRPD), IC spektroskopijom, termičkom (TG/DTA) analizom i određivanjem kapaciteta katjonske izmene, a polazne i neadsorbovane količine uranijum jona su određene fluorimetrijski. Eksperimenti su sprovedeni da se ispita uticaj odnosa čvrsto/tečno, pH i vremena na adsorpciju uranijum jona na zeolitu. Utvrđeno je da tretman sa kiselinama zeolita povećava adsorpciju uranijum jona. Najviši indeks adsorpcije imao je uzorak zeolita modifikovan sa hlorovodoničnom kiselinom. Dobijeni rezultati adsorpcije na H-zeolitu su izračunati prema Langmirovom modelu.

Projekat MPNTR, br. 142057
Razvoj stakala sa kontrolisanim otpuštanjem jona za primenu u poljoprivredi i medicini (MPNTR - 34001), The objective of this study was the review of natural zeolite, modified with acid, as a candidate material for the remediation of groundwater contaminated by uranium(VI). The modified zeolite samples were obtained by treatment of natural zeolite - clinoptilolite with acids: hydrochloric, oxalyc and citric. Starting and modified zeolites were characterized by chemical analysis, SEM, XRPD analysis, IR spectroscopy, thermal (TG/DT) analysis and by determination of cation exchange capacity, while starting and nonadsorbed amounts of uranium(VI) ion were determined by fluorometric method. Batch experiments were conducted to investigate the effect of solid/liquid ratio, pH and time on the U(VI) uptake by zeolite. Modification of zeolitic tuff with acids significantly increased adsorption of uranium(VI). The highest adsorption of uranium(VI) ion was achieved on clinoptilolite modified with hydrochloric acid. Uranium(VI) adsorption data for zeolite modified with hydrochloric acid was fitted to the Langmuir model.

Projekat MPNTR, br. 142057
The development of glasses with controlled ions release for application in agriculture and medicine (MESTD - 34001)",
journal = "Zaštita materijala",
title = "Uklanjanje uranil-jona iz rastvora kiselo tretiranim zeolitima",
pages = "551-558",
volume = "57",
number = "4",
doi = "10.5937/ZasMat1604551M",
url = "https://hdl.handle.net/21.15107/rcub_dais_899"
}

Matijašević, S., Zildžović, S., Stojanović, J., Đošić, M., Nikolić, J., Stojanović, M.,& Labus, N.. (2016). Uklanjanje uranil-jona iz rastvora kiselo tretiranim zeolitima. in Zaštita materijala, 57(4), 551-558.
https://doi.org/10.5937/ZasMat1604551M
https://hdl.handle.net/21.15107/rcub_dais_899

Matijašević S, Zildžović S, Stojanović J, Đošić M, Nikolić J, Stojanović M, Labus N. Uklanjanje uranil-jona iz rastvora kiselo tretiranim zeolitima. in Zaštita materijala. 2016;57(4):551-558.
doi:10.5937/ZasMat1604551M
https://hdl.handle.net/21.15107/rcub_dais_899 .

Matijašević, Srđan, Zildžović, Snežana, Stojanović, Jovica, Đošić, Marija, Nikolić, Jelena, Stojanović, Mirjana, Labus, Nebojša, "Uklanjanje uranil-jona iz rastvora kiselo tretiranim zeolitima" in Zaštita materijala, 57, no. 4 (2016):551-558,
https://doi.org/10.5937/ZasMat1604551M .,
https://hdl.handle.net/21.15107/rcub_dais_899 .