TY  - JOUR
AU  - Đorđević, Nataša G.
AU  - Vlahović, Milica
AU  - Mihajlović, Slavica
AU  - Martinović, Sanja
AU  - Vušović, Nenad
AU  - Lozanović-Sajić, Jasmina
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5633
AB  - During mechanical activation, qualitative changes that can produce various phenomena occur in the material. In this study, anhydrous sodium carbonate was mechanically activated for 2, 7, 14, and 28 minutes in a vibro mill at a frequency of 3000 oscillations per minute. After activation, four series of activated samples were stored in the air at room conditions for 31 days (relaxation period). To monitor the kinetics of the transformation process of activated sodium carbonate samples, i.e. the mechanism of sodium bicarbonate formation during relaxation, Fourier-transform infrared (FTIR) spectroscopy analysis was used. FTIR testing was performed as a function of relaxation time for all four series of samples, with characteristic groups observed: CO32-, HCO3- and OH-. The obtained results provided kinetics parameters for the transformation of sodium carbonate into sodium bicarbonate due to the chemisorption of moisture and carbon dioxide from the atmosphere.
AB  - Током механичке активације у материјалу се јављају квалитативне  промене које могу произвести различите појаве. У овој студији, анхидровани натријум  карбонат је механички активиран током 2, 7, 14 и 28 минута у вибро млину при  фреквенцији од 3000 осцилација у минути. Након активације, четири серије  активираних узорака су чуване на ваздуху у собним условима 31 дан (период  релаксације). За праћење кинетике процеса трансформације узорака активираног  натријум карбоната, односно механизма формирања натријум бикарбоната током  релаксације, коришћена је FTIR спектроскопска анализа. Испитивање је извршено у  функцији времена релаксације за све четири серије узорака, посматрањем  карактеристичних група: CO3 2- , HCO3- и OH- . На основу резултата, добијени су  кинетички параметри трансформације натријум карбоната у натријум бикарбонат  услед хемисорпције влаге и угљен-диоксида из атмосфере.
PB  - ETRAN Society
T2  - Science of Sintering
T1  - Fourier-transform infrared spectroscopy analysis of mechanochemical transformation kinetics of sodium carbonate to bicarbonate
VL  - 54
IS  - 4
SP  - 481
EP  - 494
DO  - 10.2298/SOS2204481D
ER  - 

@article{
author = "Đorđević, Nataša G. and Vlahović, Milica and Mihajlović, Slavica and Martinović, Sanja and Vušović, Nenad and Lozanović-Sajić, Jasmina",
year = "2022",
abstract = "During mechanical activation, qualitative changes that can produce various phenomena occur in the material. In this study, anhydrous sodium carbonate was mechanically activated for 2, 7, 14, and 28 minutes in a vibro mill at a frequency of 3000 oscillations per minute. After activation, four series of activated samples were stored in the air at room conditions for 31 days (relaxation period). To monitor the kinetics of the transformation process of activated sodium carbonate samples, i.e. the mechanism of sodium bicarbonate formation during relaxation, Fourier-transform infrared (FTIR) spectroscopy analysis was used. FTIR testing was performed as a function of relaxation time for all four series of samples, with characteristic groups observed: CO32-, HCO3- and OH-. The obtained results provided kinetics parameters for the transformation of sodium carbonate into sodium bicarbonate due to the chemisorption of moisture and carbon dioxide from the atmosphere., Током механичке активације у материјалу се јављају квалитативне  промене које могу произвести различите појаве. У овој студији, анхидровани натријум  карбонат је механички активиран током 2, 7, 14 и 28 минута у вибро млину при  фреквенцији од 3000 осцилација у минути. Након активације, четири серије  активираних узорака су чуване на ваздуху у собним условима 31 дан (период  релаксације). За праћење кинетике процеса трансформације узорака активираног  натријум карбоната, односно механизма формирања натријум бикарбоната током  релаксације, коришћена је FTIR спектроскопска анализа. Испитивање је извршено у  функцији времена релаксације за све четири серије узорака, посматрањем  карактеристичних група: CO3 2- , HCO3- и OH- . На основу резултата, добијени су  кинетички параметри трансформације натријум карбоната у натријум бикарбонат  услед хемисорпције влаге и угљен-диоксида из атмосфере.",
publisher = "ETRAN Society",
journal = "Science of Sintering",
title = "Fourier-transform infrared spectroscopy analysis of mechanochemical transformation kinetics of sodium carbonate to bicarbonate",
volume = "54",
number = "4",
pages = "481-494",
doi = "10.2298/SOS2204481D"
}

Đorđević, N. G., Vlahović, M., Mihajlović, S., Martinović, S., Vušović, N.,& Lozanović-Sajić, J.. (2022). Fourier-transform infrared spectroscopy analysis of mechanochemical transformation kinetics of sodium carbonate to bicarbonate. in Science of Sintering
ETRAN Society., 54(4), 481-494.
https://doi.org/10.2298/SOS2204481D

Đorđević NG, Vlahović M, Mihajlović S, Martinović S, Vušović N, Lozanović-Sajić J. Fourier-transform infrared spectroscopy analysis of mechanochemical transformation kinetics of sodium carbonate to bicarbonate. in Science of Sintering. 2022;54(4):481-494.
doi:10.2298/SOS2204481D .

Đorđević, Nataša G., Vlahović, Milica, Mihajlović, Slavica, Martinović, Sanja, Vušović, Nenad, Lozanović-Sajić, Jasmina, "Fourier-transform infrared spectroscopy analysis of mechanochemical transformation kinetics of sodium carbonate to bicarbonate" in Science of Sintering, 54, no. 4 (2022):481-494,
https://doi.org/10.2298/SOS2204481D . .

TY  - JOUR
AU  - Mihajlović, Slavica
AU  - Vlahović, Milica
AU  - Vušović, Nenad
AU  - Đorđević, Nataša G.
AU  - Jovanović, Marina N.
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4754
AB  - To provide the quality required for its use, raw kaolin must be subjected to certain processing procedures like delamination which is applied to the layered structure materials. The aim of this research is to determine the possibility of performing delamination in the extruder and to estimate the effects of this process on the physico-chemical properties of kaolin. The results showed that delamination can be efficiently realized in the extruder by shearing densely packed layers under the influence of friction force and added Na2 CO3 electrolyte. The crystal structure of the system was thus disrupted. This was confirmed by the Hinckley index (HI) decrease and by the dilatometric characteristics changes during heating. The particle size was reduced and, furthermore, new adsorption centers were formed, which led to an increase in the total cation exchange capacity (CEC). The plasticity of kaolin decreased with the increasing delamination degree, as well as the amount of water required for plastic processing, which is favorable in drying ceramic products.
PB  - International Institute for the Science of Sintering (IISS)
T2  - Science of Sintering
T1  - Effect оf delamination оn physico-chemical properties оf kaolin
VL  - 53
IS  - 2
SP  - 253
SP  - 266
DO  - 10.2298/SOS2102253M
ER  - 

@article{
author = "Mihajlović, Slavica and Vlahović, Milica and Vušović, Nenad and Đorđević, Nataša G. and Jovanović, Marina N.",
year = "2021",
abstract = "To provide the quality required for its use, raw kaolin must be subjected to certain processing procedures like delamination which is applied to the layered structure materials. The aim of this research is to determine the possibility of performing delamination in the extruder and to estimate the effects of this process on the physico-chemical properties of kaolin. The results showed that delamination can be efficiently realized in the extruder by shearing densely packed layers under the influence of friction force and added Na2 CO3 electrolyte. The crystal structure of the system was thus disrupted. This was confirmed by the Hinckley index (HI) decrease and by the dilatometric characteristics changes during heating. The particle size was reduced and, furthermore, new adsorption centers were formed, which led to an increase in the total cation exchange capacity (CEC). The plasticity of kaolin decreased with the increasing delamination degree, as well as the amount of water required for plastic processing, which is favorable in drying ceramic products.",
publisher = "International Institute for the Science of Sintering (IISS)",
journal = "Science of Sintering",
title = "Effect оf delamination оn physico-chemical properties оf kaolin",
volume = "53",
number = "2",
pages = "253-266",
doi = "10.2298/SOS2102253M"
}

Mihajlović, S., Vlahović, M., Vušović, N., Đorđević, N. G.,& Jovanović, M. N.. (2021). Effect оf delamination оn physico-chemical properties оf kaolin. in Science of Sintering
International Institute for the Science of Sintering (IISS)., 53(2), 253.
https://doi.org/10.2298/SOS2102253M

Mihajlović S, Vlahović M, Vušović N, Đorđević NG, Jovanović MN. Effect оf delamination оn physico-chemical properties оf kaolin. in Science of Sintering. 2021;53(2):253.
doi:10.2298/SOS2102253M .

Mihajlović, Slavica, Vlahović, Milica, Vušović, Nenad, Đorđević, Nataša G., Jovanović, Marina N., "Effect оf delamination оn physico-chemical properties оf kaolin" in Science of Sintering, 53, no. 2 (2021):253,
https://doi.org/10.2298/SOS2102253M . .

TY  - JOUR
AU  - Vušović, Nenad
AU  - Vlahović, Milica
AU  - Kržanović, Daniel
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4245
AB  - The problem of subsidence and damages on buildings above mining works is an inevitable consequence of underground coal
mining in large mining basins. Significant development of various methods for prediction of the displacement parameters of
the undermined terrain took place in the period from the middle of the last to the beginning of this century. In this paper, a
new mathematical model of the stochastic Pataric-Stojanovic method for the predictive subsidence calculation is developed.
A case study, as an example for the practical application of the proposed stochastic method, is given for the underground
coal mine “Rembas”- Resavica, Serbia. An original MITSOUKO program package, supported by spatial analyses in the
Geographic Information System (GIS), was developed for the predictive subsidence calculation based on the stochastic
method proposed by the authors Pataric and Stojanovic. The comparative analysis of predicted and measured subsidence
values confirms the possibility of using this stochastic method for predictive subsidence calculation in practice, which is a
necessity of modern mining.
PB  - Springer Nature Switzerland AG
T2  - Environmental Earth Sciences
T1  - Stochastic method for prediction of subsidence due to the underground coal mining integrated with GIS, a case study in Serbia
VL  - 80
IS  - 2
SP  - 67
DO  - 10.1007/s12665-020-09349-w
ER  - 

@article{
author = "Vušović, Nenad and Vlahović, Milica and Kržanović, Daniel",
year = "2021",
abstract = "The problem of subsidence and damages on buildings above mining works is an inevitable consequence of underground coal
mining in large mining basins. Significant development of various methods for prediction of the displacement parameters of
the undermined terrain took place in the period from the middle of the last to the beginning of this century. In this paper, a
new mathematical model of the stochastic Pataric-Stojanovic method for the predictive subsidence calculation is developed.
A case study, as an example for the practical application of the proposed stochastic method, is given for the underground
coal mine “Rembas”- Resavica, Serbia. An original MITSOUKO program package, supported by spatial analyses in the
Geographic Information System (GIS), was developed for the predictive subsidence calculation based on the stochastic
method proposed by the authors Pataric and Stojanovic. The comparative analysis of predicted and measured subsidence
values confirms the possibility of using this stochastic method for predictive subsidence calculation in practice, which is a
necessity of modern mining.",
publisher = "Springer Nature Switzerland AG",
journal = "Environmental Earth Sciences",
title = "Stochastic method for prediction of subsidence due to the underground coal mining integrated with GIS, a case study in Serbia",
volume = "80",
number = "2",
pages = "67",
doi = "10.1007/s12665-020-09349-w"
}

Vušović, N., Vlahović, M.,& Kržanović, D.. (2021). Stochastic method for prediction of subsidence due to the underground coal mining integrated with GIS, a case study in Serbia. in Environmental Earth Sciences
Springer Nature Switzerland AG., 80(2), 67.
https://doi.org/10.1007/s12665-020-09349-w

Vušović N, Vlahović M, Kržanović D. Stochastic method for prediction of subsidence due to the underground coal mining integrated with GIS, a case study in Serbia. in Environmental Earth Sciences. 2021;80(2):67.
doi:10.1007/s12665-020-09349-w .

Vušović, Nenad, Vlahović, Milica, Kržanović, Daniel, "Stochastic method for prediction of subsidence due to the underground coal mining integrated with GIS, a case study in Serbia" in Environmental Earth Sciences, 80, no. 2 (2021):67,
https://doi.org/10.1007/s12665-020-09349-w . .

TY  - CONF
AU  - Đorđević, Nataša G.
AU  - Vlahović, Milica
AU  - Mihajlović, Slavica
AU  - Martinović, Sanja
AU  - Vušović, Nenad
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5979
AB  - Sodium carbonate was mechanically activated for 7 minutes in a vibro mill at a frequency of 3000 oscillations per minute. Activated samples were stored in the air at room conditions for 31 days. To monitor the kinetics of the transformation process of sodium carbonate to bicarbonate, Fourier-transform infrared (FTIR) spectroscopy analysis was used and was performed as a function of relaxation time for characteristic groups observed: CO3 2–, HCO3 – and OH–. The obtained results provided kinetics parameters for the transformation of carbonate into bicarbonate as a result of chemisorption of moisture and carbon dioxide from the atmosphere.
PB  - University of Belgrade, Faculty of Mechanical Engineering
PB  - Serbian Tribology Society
C3  - Proceedings - 10th International Conference on Tribology–BALKANTRIB'20, 20 – 22 May 2021, Belgrade, Serbia
T1  - FTIR spectroscopy analysis of mechanochemically activated Na2CO3 during relaxation time
SP  - 201
EP  - 202
UR  - https://hdl.handle.net/21.15107/rcub_cer_5979
ER  - 

@conference{
author = "Đorđević, Nataša G. and Vlahović, Milica and Mihajlović, Slavica and Martinović, Sanja and Vušović, Nenad",
year = "2021",
abstract = "Sodium carbonate was mechanically activated for 7 minutes in a vibro mill at a frequency of 3000 oscillations per minute. Activated samples were stored in the air at room conditions for 31 days. To monitor the kinetics of the transformation process of sodium carbonate to bicarbonate, Fourier-transform infrared (FTIR) spectroscopy analysis was used and was performed as a function of relaxation time for characteristic groups observed: CO3 2–, HCO3 – and OH–. The obtained results provided kinetics parameters for the transformation of carbonate into bicarbonate as a result of chemisorption of moisture and carbon dioxide from the atmosphere.",
publisher = "University of Belgrade, Faculty of Mechanical Engineering, Serbian Tribology Society",
journal = "Proceedings - 10th International Conference on Tribology–BALKANTRIB'20, 20 – 22 May 2021, Belgrade, Serbia",
title = "FTIR spectroscopy analysis of mechanochemically activated Na2CO3 during relaxation time",
pages = "201-202",
url = "https://hdl.handle.net/21.15107/rcub_cer_5979"
}

Đorđević, N. G., Vlahović, M., Mihajlović, S., Martinović, S.,& Vušović, N.. (2021). FTIR spectroscopy analysis of mechanochemically activated Na2CO3 during relaxation time. in Proceedings - 10th International Conference on Tribology–BALKANTRIB'20, 20 – 22 May 2021, Belgrade, Serbia
University of Belgrade, Faculty of Mechanical Engineering., 201-202.
https://hdl.handle.net/21.15107/rcub_cer_5979

Đorđević NG, Vlahović M, Mihajlović S, Martinović S, Vušović N. FTIR spectroscopy analysis of mechanochemically activated Na2CO3 during relaxation time. in Proceedings - 10th International Conference on Tribology–BALKANTRIB'20, 20 – 22 May 2021, Belgrade, Serbia. 2021;:201-202.
https://hdl.handle.net/21.15107/rcub_cer_5979 .

Đorđević, Nataša G., Vlahović, Milica, Mihajlović, Slavica, Martinović, Sanja, Vušović, Nenad, "FTIR spectroscopy analysis of mechanochemically activated Na2CO3 during relaxation time" in Proceedings - 10th International Conference on Tribology–BALKANTRIB'20, 20 – 22 May 2021, Belgrade, Serbia (2021):201-202,
https://hdl.handle.net/21.15107/rcub_cer_5979 .

TY  - JOUR
AU  - Vušović, Nenad
AU  - Vlahović, Milica
AU  - Ljubojev, Milenko
AU  - Vlahović, Miljan
AU  - Kržanović, Daniel
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3818
AB  - Mining induced the ground subsidence and consequently, damages on objects above excavation
works is a serious problem all over the world. In this paper, a new approach for subsidence and deformation prediction based on the stochastic Pataric-Stojanovic method is presented. Since the calculation using the equations of this method is very complex, the original computer program package with the title MITSOUKO has been purposely designed. The MITSOUKO program enables calculating at any point of the land surface and representing the results owing to the possibility of their integration and further processing in the Geographical Information System (GIS). The components of the GIS are used to realize the spatial analysis.
PB  - Mining and Metallurgy Institute Bor
T2  - Mining and Metallurgy Engineering Bor
T1  - Software solution for the mine subsidence prediction based on the stochastic method integrated with the gis
IS  - 1-2
SP  - 1
EP  - 16
DO  - 10.5937/mmeb2002001V
ER  - 

@article{
author = "Vušović, Nenad and Vlahović, Milica and Ljubojev, Milenko and Vlahović, Miljan and Kržanović, Daniel",
year = "2020",
abstract = "Mining induced the ground subsidence and consequently, damages on objects above excavation
works is a serious problem all over the world. In this paper, a new approach for subsidence and deformation prediction based on the stochastic Pataric-Stojanovic method is presented. Since the calculation using the equations of this method is very complex, the original computer program package with the title MITSOUKO has been purposely designed. The MITSOUKO program enables calculating at any point of the land surface and representing the results owing to the possibility of their integration and further processing in the Geographical Information System (GIS). The components of the GIS are used to realize the spatial analysis.",
publisher = "Mining and Metallurgy Institute Bor",
journal = "Mining and Metallurgy Engineering Bor",
title = "Software solution for the mine subsidence prediction based on the stochastic method integrated with the gis",
number = "1-2",
pages = "1-16",
doi = "10.5937/mmeb2002001V"
}

Vušović, N., Vlahović, M., Ljubojev, M., Vlahović, M.,& Kržanović, D.. (2020). Software solution for the mine subsidence prediction based on the stochastic method integrated with the gis. in Mining and Metallurgy Engineering Bor
Mining and Metallurgy Institute Bor.(1-2), 1-16.
https://doi.org/10.5937/mmeb2002001V

Vušović N, Vlahović M, Ljubojev M, Vlahović M, Kržanović D. Software solution for the mine subsidence prediction based on the stochastic method integrated with the gis. in Mining and Metallurgy Engineering Bor. 2020;(1-2):1-16.
doi:10.5937/mmeb2002001V .

Vušović, Nenad, Vlahović, Milica, Ljubojev, Milenko, Vlahović, Miljan, Kržanović, Daniel, "Software solution for the mine subsidence prediction based on the stochastic method integrated with the gis" in Mining and Metallurgy Engineering Bor, no. 1-2 (2020):1-16,
https://doi.org/10.5937/mmeb2002001V . .