Pantović Spajić, Katarina

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orcid::0000-0003-1520-1334
  • Pantović Spajić, Katarina (6)
Projects

Author's Bibliography

Study of the effects of active bromine species presence in electrolytic desulfurization of subbituminous coal

Pantović Spajić, Katarina; Pantović Pavlović, Marijana; Božić, Katarina; Gjumišev, Đorđe; Panić, Vladimir; Pavlović, Miroslav; Stojanović, Ksenija

(Zvornik : Faculty of Technology, 2023)

TY  - CONF
AU  - Pantović Spajić, Katarina
AU  - Pantović Pavlović, Marijana
AU  - Božić, Katarina
AU  - Gjumišev, Đorđe
AU  - Panić, Vladimir
AU  - Pavlović, Miroslav
AU  - Stojanović, Ksenija
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6555
AB  - The removal of organic and inorganic sulfur from the Bogovina Basin subbituminous coal by electrochemical redox reactions was performed. The effect of presence of active bromine species on the desulfurization process was monitored. The desulfurization was performed in inorganic acidic solutions that contained different bromide concentrations and in pure acid solution. To 
determine the optimal conditions for the desulfurization process, polarization curves were 
recorded in three different electrolytes: 0.1 M H2SO4, 0.1 M H2SO4 + 0.01 M KBr, and 0.1 M 
H2SO4 + 0.1 M KBr using graphite and dimensionally stable anode (DSA) electrodes as the 
anode, while in all cases stainless steel S31603 electrode was used as cathode. By analyzing the 
results obtained from the polarization curves, 0.1 M H2SO4 and 0.1 M H2SO4 + 0.1 M KBr were 
chosen as the most suitable electrolytes. Also, it was found that the DSA anode showed better 
results in terms of energy efficiency of the process compared to the graphite anode and therefore
it was selected for the coal desulfurization process. It is considered that finely suspended coal 
particles in an electrolyte can behave according to bipolar electrochemistry. Coal was treated 
for 4 hours in two selected electrolytes. The suspension was sampled at different times up to 240 
min from the beginning of the process. Sulfur content in coal was determined by elemental 
analysis. The results showed that the sulfur content decreases faster in the case of the electrolyte 
containing KBr, i.e. that the desulfurization effect is significantly better than in the case of the 
system containing only H2SO4. It can be concluded that active bromine species accelerate the 
desulfurization process and thus improve energy efficiency.
PB  - Zvornik : Faculty of Technology
C3  - Book of Abstracts - VIII International Congress Engineering, Environment and Materials in Process Industry, March 20-23, 2023, Jahorina - Republic of Srpska, Bosnia and Herzegovina
T1  - Study of the effects of active bromine species presence in electrolytic desulfurization of subbituminous coal
SP  - 64
EP  - 64
UR  - https://hdl.handle.net/21.15107/rcub_cer_6555
ER  - 
@conference{
author = "Pantović Spajić, Katarina and Pantović Pavlović, Marijana and Božić, Katarina and Gjumišev, Đorđe and Panić, Vladimir and Pavlović, Miroslav and Stojanović, Ksenija",
year = "2023",
abstract = "The removal of organic and inorganic sulfur from the Bogovina Basin subbituminous coal by electrochemical redox reactions was performed. The effect of presence of active bromine species on the desulfurization process was monitored. The desulfurization was performed in inorganic acidic solutions that contained different bromide concentrations and in pure acid solution. To 
determine the optimal conditions for the desulfurization process, polarization curves were 
recorded in three different electrolytes: 0.1 M H2SO4, 0.1 M H2SO4 + 0.01 M KBr, and 0.1 M 
H2SO4 + 0.1 M KBr using graphite and dimensionally stable anode (DSA) electrodes as the 
anode, while in all cases stainless steel S31603 electrode was used as cathode. By analyzing the 
results obtained from the polarization curves, 0.1 M H2SO4 and 0.1 M H2SO4 + 0.1 M KBr were 
chosen as the most suitable electrolytes. Also, it was found that the DSA anode showed better 
results in terms of energy efficiency of the process compared to the graphite anode and therefore
it was selected for the coal desulfurization process. It is considered that finely suspended coal 
particles in an electrolyte can behave according to bipolar electrochemistry. Coal was treated 
for 4 hours in two selected electrolytes. The suspension was sampled at different times up to 240 
min from the beginning of the process. Sulfur content in coal was determined by elemental 
analysis. The results showed that the sulfur content decreases faster in the case of the electrolyte 
containing KBr, i.e. that the desulfurization effect is significantly better than in the case of the 
system containing only H2SO4. It can be concluded that active bromine species accelerate the 
desulfurization process and thus improve energy efficiency.",
publisher = "Zvornik : Faculty of Technology",
journal = "Book of Abstracts - VIII International Congress Engineering, Environment and Materials in Process Industry, March 20-23, 2023, Jahorina - Republic of Srpska, Bosnia and Herzegovina",
title = "Study of the effects of active bromine species presence in electrolytic desulfurization of subbituminous coal",
pages = "64-64",
url = "https://hdl.handle.net/21.15107/rcub_cer_6555"
}
Pantović Spajić, K., Pantović Pavlović, M., Božić, K., Gjumišev, Đ., Panić, V., Pavlović, M.,& Stojanović, K.. (2023). Study of the effects of active bromine species presence in electrolytic desulfurization of subbituminous coal. in Book of Abstracts - VIII International Congress Engineering, Environment and Materials in Process Industry, March 20-23, 2023, Jahorina - Republic of Srpska, Bosnia and Herzegovina
Zvornik : Faculty of Technology., 64-64.
https://hdl.handle.net/21.15107/rcub_cer_6555
Pantović Spajić K, Pantović Pavlović M, Božić K, Gjumišev Đ, Panić V, Pavlović M, Stojanović K. Study of the effects of active bromine species presence in electrolytic desulfurization of subbituminous coal. in Book of Abstracts - VIII International Congress Engineering, Environment and Materials in Process Industry, March 20-23, 2023, Jahorina - Republic of Srpska, Bosnia and Herzegovina. 2023;:64-64.
https://hdl.handle.net/21.15107/rcub_cer_6555 .
Pantović Spajić, Katarina, Pantović Pavlović, Marijana, Božić, Katarina, Gjumišev, Đorđe, Panić, Vladimir, Pavlović, Miroslav, Stojanović, Ksenija, "Study of the effects of active bromine species presence in electrolytic desulfurization of subbituminous coal" in Book of Abstracts - VIII International Congress Engineering, Environment and Materials in Process Industry, March 20-23, 2023, Jahorina - Republic of Srpska, Bosnia and Herzegovina (2023):64-64,
https://hdl.handle.net/21.15107/rcub_cer_6555 .

Deashing and Desulfurization of Subbituminous Coal from the East Field (Bogovina Basin, Serbia) – Insights from Chemical Leaching

Pantović Spajić, Katarina; Marković, Branislav; Pavlović, Miroslav; Sokić, Miroslav; Zildžović, Snežana; Đorđević, Nataša; Stojanović, Ksenija

(Belgrade, Serbia : Serbian Chemical Society, 2021)

TY  - JOUR
AU  - Pantović Spajić, Katarina
AU  - Marković, Branislav
AU  - Pavlović, Miroslav
AU  - Sokić, Miroslav
AU  - Zildžović, Snežana
AU  - Đorđević, Nataša
AU  - Stojanović, Ksenija
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6558
AB  - The study is focused on the determination of the most effective chemical leaching process for the simultaneous demineralization/deashing and desulfuri­zation of subbituminous coal from the Bogovina Basin. Coal was treated for 30 min, at different temperatures, using variable concentrations of hydro­chloric, nitric, acetic and citric acids; hydrogen peroxide, mixture of hyd­rogen peroxide and nitric acid (pH 2), as well as by the stepwise leaching pro­cess (nitric acid + mixture of hydrogen peroxide and nitric acid, pH 2). The changes in mineral composition, caused by the chemical leaching, are followed using X-ray diffraction, whereas alterations of coal organic matter are tracked by Fourier-transform infrared spectroscopy and the content of fixed carbon. Inorganic acid leaching, regardless of the temperature and acid concentration, enabled the successful deashing of coal, whereas the percent of desulfurization was insufficient. The organic acid leaching was not satisfactory for both, deashing and desulfurization. Leaching by H2O2 and H2O2/HNO3 mixture (pH 2) resulted in moderate desulfurization, but the ash reduction was low. The most suitable method for the simultaneous effective ash (78 wt.%) and the sulfur (66 wt. %) removal from Bogovina coal is the two-step leaching, com­bining 10 vol. % HNO3 and mixture of 35 vol. % H2O2/10 vol. % HNO3 of pH 2 at 60 °C.
AB  - Циљ рада је одређивање најефикаснијег хемијског третмана за истовремену деминерализацију/отпепељавање и одсумпоравање мрког угља из басена Боговина. Угаљ је
третиран 30 min, на различитим температурама, користећи различите концентрације
хлороводоничне, азотне, сирћетне и лимунске киселине; водоник-пероксид, смешу
водоник-пероксида и азотне киселине (pH 2), као и двостепено испирање (азотна киселина + смеша водоник-пероксида и азотне киселине, pH 2). Промене у минералном саставу, проузроковане хемијским третманом, праћене су дифракцијом рендгентских зрака, док су промене органске супстанце угља праћене помоћу инфрацрвене спектроскопије са Фуријеовом трансформацијом и садржаја фиксног угљеника. Третман неорганским киселинама, независно од температуре и концентрације реагенса, омогућио је успешно отпепељавање угља, док је проценат одсумпоравања био недовољан. Третман органским киселинама није био задовољавајући, ни за отпепељавање, ни за одсумпоравање. Третман угља са Н2О2 и смешом Н2О2/HNO3 (pH 2) резултовао је умереним одсумпоравањем, али је смањење садржаја пепела било мало. Најприкладнија метода за истовремено ефикасно уклањање пепела (78 мас. %) и сумпора (66 мас. %) из боговинског угља је двостепено испирање, комбинацијом 10 запр. % HNO3 и смеше 35 запр. % H2O2/10 запр. % HNO3 (pH 2) на 60 °С.
PB  - Belgrade, Serbia : Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Deashing and Desulfurization of Subbituminous Coal from the East Field (Bogovina Basin, Serbia) – Insights from Chemical Leaching
T1  - Oтпепељавање и одсумпоравање мрког угља из источноg пољa басена Боговина (Србија) хемијским третманом
VL  - 86
IS  - 11
SP  - 1113
EP  - 1126
DO  - 10.2298/JSC210719061P
ER  - 
@article{
author = "Pantović Spajić, Katarina and Marković, Branislav and Pavlović, Miroslav and Sokić, Miroslav and Zildžović, Snežana and Đorđević, Nataša and Stojanović, Ksenija",
year = "2021",
abstract = "The study is focused on the determination of the most effective chemical leaching process for the simultaneous demineralization/deashing and desulfuri­zation of subbituminous coal from the Bogovina Basin. Coal was treated for 30 min, at different temperatures, using variable concentrations of hydro­chloric, nitric, acetic and citric acids; hydrogen peroxide, mixture of hyd­rogen peroxide and nitric acid (pH 2), as well as by the stepwise leaching pro­cess (nitric acid + mixture of hydrogen peroxide and nitric acid, pH 2). The changes in mineral composition, caused by the chemical leaching, are followed using X-ray diffraction, whereas alterations of coal organic matter are tracked by Fourier-transform infrared spectroscopy and the content of fixed carbon. Inorganic acid leaching, regardless of the temperature and acid concentration, enabled the successful deashing of coal, whereas the percent of desulfurization was insufficient. The organic acid leaching was not satisfactory for both, deashing and desulfurization. Leaching by H2O2 and H2O2/HNO3 mixture (pH 2) resulted in moderate desulfurization, but the ash reduction was low. The most suitable method for the simultaneous effective ash (78 wt.%) and the sulfur (66 wt. %) removal from Bogovina coal is the two-step leaching, com­bining 10 vol. % HNO3 and mixture of 35 vol. % H2O2/10 vol. % HNO3 of pH 2 at 60 °C., Циљ рада је одређивање најефикаснијег хемијског третмана за истовремену деминерализацију/отпепељавање и одсумпоравање мрког угља из басена Боговина. Угаљ је
третиран 30 min, на различитим температурама, користећи различите концентрације
хлороводоничне, азотне, сирћетне и лимунске киселине; водоник-пероксид, смешу
водоник-пероксида и азотне киселине (pH 2), као и двостепено испирање (азотна киселина + смеша водоник-пероксида и азотне киселине, pH 2). Промене у минералном саставу, проузроковане хемијским третманом, праћене су дифракцијом рендгентских зрака, док су промене органске супстанце угља праћене помоћу инфрацрвене спектроскопије са Фуријеовом трансформацијом и садржаја фиксног угљеника. Третман неорганским киселинама, независно од температуре и концентрације реагенса, омогућио је успешно отпепељавање угља, док је проценат одсумпоравања био недовољан. Третман органским киселинама није био задовољавајући, ни за отпепељавање, ни за одсумпоравање. Третман угља са Н2О2 и смешом Н2О2/HNO3 (pH 2) резултовао је умереним одсумпоравањем, али је смањење садржаја пепела било мало. Најприкладнија метода за истовремено ефикасно уклањање пепела (78 мас. %) и сумпора (66 мас. %) из боговинског угља је двостепено испирање, комбинацијом 10 запр. % HNO3 и смеше 35 запр. % H2O2/10 запр. % HNO3 (pH 2) на 60 °С.",
publisher = "Belgrade, Serbia : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Deashing and Desulfurization of Subbituminous Coal from the East Field (Bogovina Basin, Serbia) – Insights from Chemical Leaching, Oтпепељавање и одсумпоравање мрког угља из источноg пољa басена Боговина (Србија) хемијским третманом",
volume = "86",
number = "11",
pages = "1113-1126",
doi = "10.2298/JSC210719061P"
}
Pantović Spajić, K., Marković, B., Pavlović, M., Sokić, M., Zildžović, S., Đorđević, N.,& Stojanović, K.. (2021). Deashing and Desulfurization of Subbituminous Coal from the East Field (Bogovina Basin, Serbia) – Insights from Chemical Leaching. in Journal of the Serbian Chemical Society
Belgrade, Serbia : Serbian Chemical Society., 86(11), 1113-1126.
https://doi.org/10.2298/JSC210719061P
Pantović Spajić K, Marković B, Pavlović M, Sokić M, Zildžović S, Đorđević N, Stojanović K. Deashing and Desulfurization of Subbituminous Coal from the East Field (Bogovina Basin, Serbia) – Insights from Chemical Leaching. in Journal of the Serbian Chemical Society. 2021;86(11):1113-1126.
doi:10.2298/JSC210719061P .
Pantović Spajić, Katarina, Marković, Branislav, Pavlović, Miroslav, Sokić, Miroslav, Zildžović, Snežana, Đorđević, Nataša, Stojanović, Ksenija, "Deashing and Desulfurization of Subbituminous Coal from the East Field (Bogovina Basin, Serbia) – Insights from Chemical Leaching" in Journal of the Serbian Chemical Society, 86, no. 11 (2021):1113-1126,
https://doi.org/10.2298/JSC210719061P . .
1
1
2

Comparison of extraction agents for metal determination in sediments from artificial lakes and rivers in Serbia

Pantović Spajić, Katarina; Sakan, Sanja; Đorđević, Dragana; Šoštarić, Tatjana; Lopičić, Zorica; Janićijević, Aleksandra; Stojanović, Ksenija

(2019)

TY  - JOUR
AU  - Pantović Spajić, Katarina
AU  - Sakan, Sanja
AU  - Đorđević, Dragana
AU  - Šoštarić, Tatjana
AU  - Lopičić, Zorica
AU  - Janićijević, Aleksandra
AU  - Stojanović, Ksenija
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7489
AB  - The purpose of this paper was to investigate the effectiveness of three different extraction agents for the extraction of 25 elements from sediment samples collected from 4 artificial lakes and 12 rivers in Serbia (33 samples in total). The extraction efficiency of the agents was evaluated by its ability to extract the highest quantity of the elements. For that purpose, three acids (1M HCl, 2M HNO3 and 0.43M CH3COOH) have been used. Inductively coupled plasma atomic emission spectrometry (ICP-OES) was used for quantitative determination of following elements: Al, As, B, Ba, Be, Bi, Ca, Cd, Cr, Co, Cu, Fe, Hg, K, Li, Mg, Mn, Ni, Na, Pb, Sb, Se, Sr, V, and Zn. The extraction with 1M HCl has shown the best results for the majority of investigated elements (especially Sr, Mn and Ca). Antimony (Sb) was detected only after extraction with 0.43M CH3COOOH, while selenium (Se) could not be detected when 2M HNO3 was applied as extraction agents. The present study could be very useful for choosing a suitable method for specific elements and also can be helpful in the evaluation of the contaminants in freshwater sediments in Serbia. This might contribute to environmental risk assessment of the present elements.
T2  - Acta Periodica Technologica
T1  - Comparison of extraction agents for metal determination in sediments from artificial lakes and rivers in Serbia
VL  - 50
SP  - 189
EP  - 196
DO  - 10.2298/APT1950189P
ER  - 
@article{
author = "Pantović Spajić, Katarina and Sakan, Sanja and Đorđević, Dragana and Šoštarić, Tatjana and Lopičić, Zorica and Janićijević, Aleksandra and Stojanović, Ksenija",
year = "2019",
abstract = "The purpose of this paper was to investigate the effectiveness of three different extraction agents for the extraction of 25 elements from sediment samples collected from 4 artificial lakes and 12 rivers in Serbia (33 samples in total). The extraction efficiency of the agents was evaluated by its ability to extract the highest quantity of the elements. For that purpose, three acids (1M HCl, 2M HNO3 and 0.43M CH3COOH) have been used. Inductively coupled plasma atomic emission spectrometry (ICP-OES) was used for quantitative determination of following elements: Al, As, B, Ba, Be, Bi, Ca, Cd, Cr, Co, Cu, Fe, Hg, K, Li, Mg, Mn, Ni, Na, Pb, Sb, Se, Sr, V, and Zn. The extraction with 1M HCl has shown the best results for the majority of investigated elements (especially Sr, Mn and Ca). Antimony (Sb) was detected only after extraction with 0.43M CH3COOOH, while selenium (Se) could not be detected when 2M HNO3 was applied as extraction agents. The present study could be very useful for choosing a suitable method for specific elements and also can be helpful in the evaluation of the contaminants in freshwater sediments in Serbia. This might contribute to environmental risk assessment of the present elements.",
journal = "Acta Periodica Technologica",
title = "Comparison of extraction agents for metal determination in sediments from artificial lakes and rivers in Serbia",
volume = "50",
pages = "189-196",
doi = "10.2298/APT1950189P"
}
Pantović Spajić, K., Sakan, S., Đorđević, D., Šoštarić, T., Lopičić, Z., Janićijević, A.,& Stojanović, K.. (2019). Comparison of extraction agents for metal determination in sediments from artificial lakes and rivers in Serbia. in Acta Periodica Technologica, 50, 189-196.
https://doi.org/10.2298/APT1950189P
Pantović Spajić K, Sakan S, Đorđević D, Šoštarić T, Lopičić Z, Janićijević A, Stojanović K. Comparison of extraction agents for metal determination in sediments from artificial lakes and rivers in Serbia. in Acta Periodica Technologica. 2019;50:189-196.
doi:10.2298/APT1950189P .
Pantović Spajić, Katarina, Sakan, Sanja, Đorđević, Dragana, Šoštarić, Tatjana, Lopičić, Zorica, Janićijević, Aleksandra, Stojanović, Ksenija, "Comparison of extraction agents for metal determination in sediments from artificial lakes and rivers in Serbia" in Acta Periodica Technologica, 50 (2019):189-196,
https://doi.org/10.2298/APT1950189P . .
1
1

The Investigation of Characteristics and Thermal Behaviour of Lignocellulosic Waste Biomass Using Thermogravimetric Analysis

Lopičić, Zorica; Šoštarić, Tatjana; Hosseini-Bandegharaei, Ahmad; Milojković, Jelena; Petrović, Marija; Pantović Spajić, Katarina; Avdalović, Jelena

(Bosnia and Herzegovina : University of East Sarajevo, Faculty of Technology, 2019)

TY  - JOUR
AU  - Lopičić, Zorica
AU  - Šoštarić, Tatjana
AU  - Hosseini-Bandegharaei, Ahmad
AU  - Milojković, Jelena
AU  - Petrović, Marija
AU  - Pantović Spajić, Katarina
AU  - Avdalović, Jelena
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3879
AB  - This paper focuses on lignocellulosic waste biomass originating from food industry, which should find its further application in order to fulfill demands of circular economy. Therefore, here are presented some of the chemical and physical properties that affect combustion process, as well as thermochemical reaction kinetics for lignocellulosic biomass wastes. The biomass investigated was peach stone particles originating from food industry. The results have showed that peach stones can be characterized as good energy alternative renewable material, with properties that allow its safe thermochemical conversion. Kinetic analysis of this biomass was performed using Thermogravimetric Analysis (TGA) with a simple reaction model applied, namely n-th order reaction model. The obtained results have confirmed the complex nature of this material and the need for further modelling.
PB  - Bosnia and Herzegovina : University of East Sarajevo, Faculty of Technology
T2  - Journal of Engineering & Processing Management
T1  - The Investigation of Characteristics and Thermal Behaviour of Lignocellulosic Waste Biomass Using Thermogravimetric Analysis
VL  - 11
IS  - 1
SP  - 18
EP  - 23
DO  - 10.7251/JEPM1901018L
ER  - 
@article{
author = "Lopičić, Zorica and Šoštarić, Tatjana and Hosseini-Bandegharaei, Ahmad and Milojković, Jelena and Petrović, Marija and Pantović Spajić, Katarina and Avdalović, Jelena",
year = "2019",
abstract = "This paper focuses on lignocellulosic waste biomass originating from food industry, which should find its further application in order to fulfill demands of circular economy. Therefore, here are presented some of the chemical and physical properties that affect combustion process, as well as thermochemical reaction kinetics for lignocellulosic biomass wastes. The biomass investigated was peach stone particles originating from food industry. The results have showed that peach stones can be characterized as good energy alternative renewable material, with properties that allow its safe thermochemical conversion. Kinetic analysis of this biomass was performed using Thermogravimetric Analysis (TGA) with a simple reaction model applied, namely n-th order reaction model. The obtained results have confirmed the complex nature of this material and the need for further modelling.",
publisher = "Bosnia and Herzegovina : University of East Sarajevo, Faculty of Technology",
journal = "Journal of Engineering & Processing Management",
title = "The Investigation of Characteristics and Thermal Behaviour of Lignocellulosic Waste Biomass Using Thermogravimetric Analysis",
volume = "11",
number = "1",
pages = "18-23",
doi = "10.7251/JEPM1901018L"
}
Lopičić, Z., Šoštarić, T., Hosseini-Bandegharaei, A., Milojković, J., Petrović, M., Pantović Spajić, K.,& Avdalović, J.. (2019). The Investigation of Characteristics and Thermal Behaviour of Lignocellulosic Waste Biomass Using Thermogravimetric Analysis. in Journal of Engineering & Processing Management
Bosnia and Herzegovina : University of East Sarajevo, Faculty of Technology., 11(1), 18-23.
https://doi.org/10.7251/JEPM1901018L
Lopičić Z, Šoštarić T, Hosseini-Bandegharaei A, Milojković J, Petrović M, Pantović Spajić K, Avdalović J. The Investigation of Characteristics and Thermal Behaviour of Lignocellulosic Waste Biomass Using Thermogravimetric Analysis. in Journal of Engineering & Processing Management. 2019;11(1):18-23.
doi:10.7251/JEPM1901018L .
Lopičić, Zorica, Šoštarić, Tatjana, Hosseini-Bandegharaei, Ahmad, Milojković, Jelena, Petrović, Marija, Pantović Spajić, Katarina, Avdalović, Jelena, "The Investigation of Characteristics and Thermal Behaviour of Lignocellulosic Waste Biomass Using Thermogravimetric Analysis" in Journal of Engineering & Processing Management, 11, no. 1 (2019):18-23,
https://doi.org/10.7251/JEPM1901018L . .

In situ synthesis of biocompatible composite layer of hydroxyapatite/passive oxide surfaces on the modified titanium

Pantović Pavlović, Marijana; Eraković, Sanja; Pavlović, Miroslav; Pantović Spajić, Katarina; Panić, Vladimir; Pavlović, Miomir

(Bor, Serbia : University of Belgrade, Technical Faculty in Bor, 2017)

TY  - CONF
AU  - Pantović Pavlović, Marijana
AU  - Eraković, Sanja
AU  - Pavlović, Miroslav
AU  - Pantović Spajić, Katarina
AU  - Panić, Vladimir
AU  - Pavlović, Miomir
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6613
AB  - Hydroxyapatite (HAp) is the most suitable biocompatible material for bone implant coatings. However, its brittleness is a major obstacle, and that is why, recently, research focused on creating composites. In this study, a novel in situ synthesis of HAp coating on titanium was presented. HAp was anaphoretically deposited from alkaline-ethanol suspension in one step process. Morphology of the coating was investigated by optical microscopy, while deposited HAp was characterized using ATR-FTIR. It was concluded that HAp has excellent coverage of the surface without delamination. The obtained coating can be good material for bone implants due to solving HAp brittleness.
PB  - Bor, Serbia : University of Belgrade, Technical Faculty in Bor
C3  - Proceedings - XXV International Conference "ECOLOGICAL TRUTH" Eco-Ist'17, June 12-15, Vrnjačka Banja, Serbia
T1  - In situ synthesis of biocompatible composite layer of hydroxyapatite/passive oxide surfaces on the modified titanium
SP  - 301
EP  - 306
UR  - https://hdl.handle.net/21.15107/rcub_cer_6613
ER  - 
@conference{
author = "Pantović Pavlović, Marijana and Eraković, Sanja and Pavlović, Miroslav and Pantović Spajić, Katarina and Panić, Vladimir and Pavlović, Miomir",
year = "2017",
abstract = "Hydroxyapatite (HAp) is the most suitable biocompatible material for bone implant coatings. However, its brittleness is a major obstacle, and that is why, recently, research focused on creating composites. In this study, a novel in situ synthesis of HAp coating on titanium was presented. HAp was anaphoretically deposited from alkaline-ethanol suspension in one step process. Morphology of the coating was investigated by optical microscopy, while deposited HAp was characterized using ATR-FTIR. It was concluded that HAp has excellent coverage of the surface without delamination. The obtained coating can be good material for bone implants due to solving HAp brittleness.",
publisher = "Bor, Serbia : University of Belgrade, Technical Faculty in Bor",
journal = "Proceedings - XXV International Conference "ECOLOGICAL TRUTH" Eco-Ist'17, June 12-15, Vrnjačka Banja, Serbia",
title = "In situ synthesis of biocompatible composite layer of hydroxyapatite/passive oxide surfaces on the modified titanium",
pages = "301-306",
url = "https://hdl.handle.net/21.15107/rcub_cer_6613"
}
Pantović Pavlović, M., Eraković, S., Pavlović, M., Pantović Spajić, K., Panić, V.,& Pavlović, M.. (2017). In situ synthesis of biocompatible composite layer of hydroxyapatite/passive oxide surfaces on the modified titanium. in Proceedings - XXV International Conference "ECOLOGICAL TRUTH" Eco-Ist'17, June 12-15, Vrnjačka Banja, Serbia
Bor, Serbia : University of Belgrade, Technical Faculty in Bor., 301-306.
https://hdl.handle.net/21.15107/rcub_cer_6613
Pantović Pavlović M, Eraković S, Pavlović M, Pantović Spajić K, Panić V, Pavlović M. In situ synthesis of biocompatible composite layer of hydroxyapatite/passive oxide surfaces on the modified titanium. in Proceedings - XXV International Conference "ECOLOGICAL TRUTH" Eco-Ist'17, June 12-15, Vrnjačka Banja, Serbia. 2017;:301-306.
https://hdl.handle.net/21.15107/rcub_cer_6613 .
Pantović Pavlović, Marijana, Eraković, Sanja, Pavlović, Miroslav, Pantović Spajić, Katarina, Panić, Vladimir, Pavlović, Miomir, "In situ synthesis of biocompatible composite layer of hydroxyapatite/passive oxide surfaces on the modified titanium" in Proceedings - XXV International Conference "ECOLOGICAL TRUTH" Eco-Ist'17, June 12-15, Vrnjačka Banja, Serbia (2017):301-306,
https://hdl.handle.net/21.15107/rcub_cer_6613 .

Monitoring of Krivelj river collector deformation

Pantović, Radoje V.; Pantović Pavlović, Marijana; Pantović Spajić, Katarina; Pavlović, Miroslav

(Skopje : Society of chemists and technologists of Macedonia, 2016)

TY  - CONF
AU  - Pantović, Radoje V.
AU  - Pantović Pavlović, Marijana
AU  - Pantović Spajić, Katarina
AU  - Pavlović, Miroslav
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6632
AB  - Study of monitoring and analyzing the deformation of the collector Krivelj River has been developed. In the period May-July 2009, the recording of the measurements and the state of the crack deformation in reinforced concrete collectors lining was performed.
Based on analysis of the recording, four characteristic lining deformation of the shape in vulnerable parts of the collector were identified: in calotte, on the sides of calotte, sides themselves, and sides of ducts.
Deformations in calotte zone were in form of tension cracks, reinforcement tears and separation of concrete from the reinforcement created due to high tensile stresses in the inner part of the reinforced concrete lining. The worst damage was observed due to shear stresses in the lateral parts of the calotte, while the cracks in some parts exceeded 10 cm. These are very large and dangerous damages to the collector. Given that there was a fracture of concrete, loads in those areas was taken over by the armature, which was affected by severe corrosion. Due to the large vertical pressures and the tendency for flattening of the collector in internal lateral parts of support, there was erosion of concrete in the form of plates. Small cracks appeared in the side parts of the collector ducts, too.
For collector cross sections recording, in addition to the geodetic procedure, rotating laser beam procedure was applied. Based on these recordings it can be concluded that the profile of the collector, on his damaged sections, is "flattened". The laser process enables easier, faster and more credible measurements of the size and shape of the profile, which may be of particular importance when installing frameworks for future temporary and permanent rehabilitation of vulnerable sections of the collector.
Changes in the deformation of the ten selected places in collectors were observed using embedded devices for measuring deformation cracks in collector reinforced concrete support. Final results of monitoring changes in absolute and relative deformation of reinforced concrete collector of over time show that established shifts are part of the process of reinforced concrete roof supports deformation, which is directed towards the fracture and support breaking.
PB  - Skopje : Society of chemists and technologists of Macedonia
C3  - Book of abstracts - 24th Congress of Chemists and Technologists of Macedonia, September 11-14, Ohrid, Republic of Macedonia
T1  - Monitoring of Krivelj river collector deformation
SP  - 161
EP  - 161
UR  - https://hdl.handle.net/21.15107/rcub_cer_6632
ER  - 
@conference{
author = "Pantović, Radoje V. and Pantović Pavlović, Marijana and Pantović Spajić, Katarina and Pavlović, Miroslav",
year = "2016",
abstract = "Study of monitoring and analyzing the deformation of the collector Krivelj River has been developed. In the period May-July 2009, the recording of the measurements and the state of the crack deformation in reinforced concrete collectors lining was performed.
Based on analysis of the recording, four characteristic lining deformation of the shape in vulnerable parts of the collector were identified: in calotte, on the sides of calotte, sides themselves, and sides of ducts.
Deformations in calotte zone were in form of tension cracks, reinforcement tears and separation of concrete from the reinforcement created due to high tensile stresses in the inner part of the reinforced concrete lining. The worst damage was observed due to shear stresses in the lateral parts of the calotte, while the cracks in some parts exceeded 10 cm. These are very large and dangerous damages to the collector. Given that there was a fracture of concrete, loads in those areas was taken over by the armature, which was affected by severe corrosion. Due to the large vertical pressures and the tendency for flattening of the collector in internal lateral parts of support, there was erosion of concrete in the form of plates. Small cracks appeared in the side parts of the collector ducts, too.
For collector cross sections recording, in addition to the geodetic procedure, rotating laser beam procedure was applied. Based on these recordings it can be concluded that the profile of the collector, on his damaged sections, is "flattened". The laser process enables easier, faster and more credible measurements of the size and shape of the profile, which may be of particular importance when installing frameworks for future temporary and permanent rehabilitation of vulnerable sections of the collector.
Changes in the deformation of the ten selected places in collectors were observed using embedded devices for measuring deformation cracks in collector reinforced concrete support. Final results of monitoring changes in absolute and relative deformation of reinforced concrete collector of over time show that established shifts are part of the process of reinforced concrete roof supports deformation, which is directed towards the fracture and support breaking.",
publisher = "Skopje : Society of chemists and technologists of Macedonia",
journal = "Book of abstracts - 24th Congress of Chemists and Technologists of Macedonia, September 11-14, Ohrid, Republic of Macedonia",
title = "Monitoring of Krivelj river collector deformation",
pages = "161-161",
url = "https://hdl.handle.net/21.15107/rcub_cer_6632"
}
Pantović, R. V., Pantović Pavlović, M., Pantović Spajić, K.,& Pavlović, M.. (2016). Monitoring of Krivelj river collector deformation. in Book of abstracts - 24th Congress of Chemists and Technologists of Macedonia, September 11-14, Ohrid, Republic of Macedonia
Skopje : Society of chemists and technologists of Macedonia., 161-161.
https://hdl.handle.net/21.15107/rcub_cer_6632
Pantović RV, Pantović Pavlović M, Pantović Spajić K, Pavlović M. Monitoring of Krivelj river collector deformation. in Book of abstracts - 24th Congress of Chemists and Technologists of Macedonia, September 11-14, Ohrid, Republic of Macedonia. 2016;:161-161.
https://hdl.handle.net/21.15107/rcub_cer_6632 .
Pantović, Radoje V., Pantović Pavlović, Marijana, Pantović Spajić, Katarina, Pavlović, Miroslav, "Monitoring of Krivelj river collector deformation" in Book of abstracts - 24th Congress of Chemists and Technologists of Macedonia, September 11-14, Ohrid, Republic of Macedonia (2016):161-161,
https://hdl.handle.net/21.15107/rcub_cer_6632 .