TY  - CONF
AU  - Knežević, Nataša
AU  - Jovanović, Aleksandar
AU  - Bugarčić, Mladen
AU  - Vuksanović, Marija
AU  - Milošević, Milena
AU  - Pešić, Ivan
AU  - Marinković, Aleksandar
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1202
AB  - Cotton-based membranes, due to their exceptional biocompatibility and sustainability,
have attracted considerable attention in various applications, especially in the field of bio and
green technologies. This study investigates the biodegradation potential of cotton membranes
modified with TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl) radical and citric acid (CA),
with the aim of improving their properties and facilitating environmentally friendly disposal.
TEMPO radicals, in conjunction with the crosslinker citric acid, are incorporated into the
cellulose structure through a novel modification process. The citric acid component acted as a
plasticizer, increasing the amorphous parts of the cellulose and promoting enzymatic attack.
The TEMPO radical, with its nitroxyl group, contributed to the oxidation of cellulose, further
facilitating biodegradation.
The biodegradation aspect of these modified membranes was investigated in
controlled environmental conditions (Soil Burial test), simulating natural scenarios (humidity,
influence of enzymes, and bacteria). Biodegradation parameters such as weight loss,
structural changes, and degradation kinetics were examined during 90 days. Characterization
of the structure was performed using FTIR and SEM methods.
Our findings suggest that cellulosic membranes possess complete (100%)
biodegradability after 70 days compared to unmodified membranes. Obtained result shed
light on the potential of membranes modified in this way as sustainable and biodegradable
alternatives in various applications. The results emphasize their ecological nature and ability
to reduce environmental stress. Such cellulose-based materials promise a much greener future
in biotechnology, healthcare, and environmental protection.
PB  - Belgrade : University of Belgrade, Faculty of Technology and Metallurgy
C3  - International Conference BIOCHEMICAL ENGINEERING AND BIOTECHNOLOGY FOR YOUNG SCIENTISTS
T1  - Possibility of biodegradation of cotton membrane containing TEMPO radical and citric acid
ER  - 

@conference{
author = "Knežević, Nataša and Jovanović, Aleksandar and Bugarčić, Mladen and Vuksanović, Marija and Milošević, Milena and Pešić, Ivan and Marinković, Aleksandar",
year = "2023",
abstract = "Cotton-based membranes, due to their exceptional biocompatibility and sustainability,
have attracted considerable attention in various applications, especially in the field of bio and
green technologies. This study investigates the biodegradation potential of cotton membranes
modified with TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl) radical and citric acid (CA),
with the aim of improving their properties and facilitating environmentally friendly disposal.
TEMPO radicals, in conjunction with the crosslinker citric acid, are incorporated into the
cellulose structure through a novel modification process. The citric acid component acted as a
plasticizer, increasing the amorphous parts of the cellulose and promoting enzymatic attack.
The TEMPO radical, with its nitroxyl group, contributed to the oxidation of cellulose, further
facilitating biodegradation.
The biodegradation aspect of these modified membranes was investigated in
controlled environmental conditions (Soil Burial test), simulating natural scenarios (humidity,
influence of enzymes, and bacteria). Biodegradation parameters such as weight loss,
structural changes, and degradation kinetics were examined during 90 days. Characterization
of the structure was performed using FTIR and SEM methods.
Our findings suggest that cellulosic membranes possess complete (100%)
biodegradability after 70 days compared to unmodified membranes. Obtained result shed
light on the potential of membranes modified in this way as sustainable and biodegradable
alternatives in various applications. The results emphasize their ecological nature and ability
to reduce environmental stress. Such cellulose-based materials promise a much greener future
in biotechnology, healthcare, and environmental protection.",
publisher = "Belgrade : University of Belgrade, Faculty of Technology and Metallurgy",
journal = "International Conference BIOCHEMICAL ENGINEERING AND BIOTECHNOLOGY FOR YOUNG SCIENTISTS",
title = "Possibility of biodegradation of cotton membrane containing TEMPO radical and citric acid"
}

Knežević, N., Jovanović, A., Bugarčić, M., Vuksanović, M., Milošević, M., Pešić, I.,& Marinković, A.. (2023). Possibility of biodegradation of cotton membrane containing TEMPO radical and citric acid. in International Conference BIOCHEMICAL ENGINEERING AND BIOTECHNOLOGY FOR YOUNG SCIENTISTS
Belgrade : University of Belgrade, Faculty of Technology and Metallurgy..

Knežević N, Jovanović A, Bugarčić M, Vuksanović M, Milošević M, Pešić I, Marinković A. Possibility of biodegradation of cotton membrane containing TEMPO radical and citric acid. in International Conference BIOCHEMICAL ENGINEERING AND BIOTECHNOLOGY FOR YOUNG SCIENTISTS. 2023;..

Knežević, Nataša, Jovanović, Aleksandar, Bugarčić, Mladen, Vuksanović, Marija, Milošević, Milena, Pešić, Ivan, Marinković, Aleksandar, "Possibility of biodegradation of cotton membrane containing TEMPO radical and citric acid" in International Conference BIOCHEMICAL ENGINEERING AND BIOTECHNOLOGY FOR YOUNG SCIENTISTS (2023).

Kovačina, J., Gojgić, J., Živković, A., Čutović, N., Jovanović, A., Milošević, M., Simović, A., Zagorac, M.,& Stanemković, B.. (2021). Proizvodnja ekološki prihvatljivih antikorozionih sredstava za dobijanje industrijskih premaza. in Takmičenje za najbolju tehnološku inovaciju.

Kovačina J, Gojgić J, Živković A, Čutović N, Jovanović A, Milošević M, Simović A, Zagorac M, Stanemković B. Proizvodnja ekološki prihvatljivih antikorozionih sredstava za dobijanje industrijskih premaza. in Takmičenje za najbolju tehnološku inovaciju. 2021;..

Kovačina, Jovanka, Gojgić, Jelena, Živković, Andrej, Čutović, Natalija, Jovanović, Aleksandar, Milošević, Milena, Simović, Anđela, Zagorac, Milica, Stanemković, Branimir, "Proizvodnja ekološki prihvatljivih antikorozionih sredstava za dobijanje industrijskih premaza" in Takmičenje za najbolju tehnološku inovaciju (2021).

Marinković, A., Milosavljević, M., Rusmirović, J., Kovačević, T., Kovačina, J., Milošević, M., Jovanović, A.,& Petrović, S.. (2021). Innovative and eco-friendly technology for unsaturated polyester based gel-coat production from bio-renewable and waste materials. 
Belgrade : Belgrade Association of Inventors..

Marinković A, Milosavljević M, Rusmirović J, Kovačević T, Kovačina J, Milošević M, Jovanović A, Petrović S. Innovative and eco-friendly technology for unsaturated polyester based gel-coat production from bio-renewable and waste materials. 2021;..

Marinković, Aleksandar, Milosavljević, Milutin, Rusmirović, Jelena, Kovačević, Tihomir, Kovačina, Jovanka, Milošević, Milena, Jovanović, Aleksandar, Petrović, Slobodan, "Innovative and eco-friendly technology for unsaturated polyester based gel-coat production from bio-renewable and waste materials" (2021).

TY  - CONF
AU  - Bugarčić, Mladen
AU  - Perendija, Jovana
AU  - Milošević, Milena
AU  - Milošević, Dragana
AU  - Obradović, Milena
AU  - Karić, Nataša
AU  - Marinković, Aleksandar
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/993
AB  - Heavy metal presence in aquatic ecosystems has a huge impact on almost all the living [1]. Problem such as this have to be lessened or eliminated if it is possible. Facile and efficient method for decreasing pollutant concentration from water solutions is by adsorption [2]. In this work raw expanded vermiculite (REV) is utilized as carrier of magnetite microcrystals. This modification of the REV was done by ultrasound and consecutive precipitation of magnetite particles on its surface. This composite is characterized using further methods: X–Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier Transformed Infra-Red (FTIR), specific surface area (using BET methodology) and Cation Exchange Capacity(CEC) and its adsorption properties are checked. Considering the structure, CEC and specific surface area this material has moderate adsorption parameters. For example, batch adsorption on 35 °C adsorbent accomplished capacity of 19 mg Ni/g and 65.8 % removal of Ni for 90 minutes of adsorption is done on 45 °C are done with S/L ratio of 1,33 g/L. Adsorption kinetics followed pseudo–second order, as exceptedwith equilibrium capacity of 14.27 mg Ni/g and rate constant of sorption of 0.00594 g/(mg min). Isotherm showed the best correlation with Freundlich isotherm model and somewhat poor for Langmuir isotherm. Gibbs free energy decreases with temperature increase showed that the adsorption process is endothermic so chemisorption is the mechanism responsible for nickel removal.
PB  - Bor : University of Belgrade, Technical Faculty in Bor
C3  - 6th INTERNATIONAL STUDENT CONFERENCE ON TECHNICAL SCIENCES
T1  - Nickel removal from aqueous solution using composite based on magnetite/expanded vermiculite
EP  - 9
SP  - 9
ER  - 

@conference{
author = "Bugarčić, Mladen and Perendija, Jovana and Milošević, Milena and Milošević, Dragana and Obradović, Milena and Karić, Nataša and Marinković, Aleksandar",
year = "2019",
abstract = "Heavy metal presence in aquatic ecosystems has a huge impact on almost all the living [1]. Problem such as this have to be lessened or eliminated if it is possible. Facile and efficient method for decreasing pollutant concentration from water solutions is by adsorption [2]. In this work raw expanded vermiculite (REV) is utilized as carrier of magnetite microcrystals. This modification of the REV was done by ultrasound and consecutive precipitation of magnetite particles on its surface. This composite is characterized using further methods: X–Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier Transformed Infra-Red (FTIR), specific surface area (using BET methodology) and Cation Exchange Capacity(CEC) and its adsorption properties are checked. Considering the structure, CEC and specific surface area this material has moderate adsorption parameters. For example, batch adsorption on 35 °C adsorbent accomplished capacity of 19 mg Ni/g and 65.8 % removal of Ni for 90 minutes of adsorption is done on 45 °C are done with S/L ratio of 1,33 g/L. Adsorption kinetics followed pseudo–second order, as exceptedwith equilibrium capacity of 14.27 mg Ni/g and rate constant of sorption of 0.00594 g/(mg min). Isotherm showed the best correlation with Freundlich isotherm model and somewhat poor for Langmuir isotherm. Gibbs free energy decreases with temperature increase showed that the adsorption process is endothermic so chemisorption is the mechanism responsible for nickel removal.",
publisher = "Bor : University of Belgrade, Technical Faculty in Bor",
journal = "6th INTERNATIONAL STUDENT CONFERENCE ON TECHNICAL SCIENCES",
title = "Nickel removal from aqueous solution using composite based on magnetite/expanded vermiculite",
pages = "9-9"
}

Bugarčić, M., Perendija, J., Milošević, M., Milošević, D., Obradović, M., Karić, N.,& Marinković, A.. (2019). Nickel removal from aqueous solution using composite based on magnetite/expanded vermiculite. in 6th INTERNATIONAL STUDENT CONFERENCE ON TECHNICAL SCIENCES
Bor : University of Belgrade, Technical Faculty in Bor., 9-9.

Bugarčić M, Perendija J, Milošević M, Milošević D, Obradović M, Karić N, Marinković A. Nickel removal from aqueous solution using composite based on magnetite/expanded vermiculite. in 6th INTERNATIONAL STUDENT CONFERENCE ON TECHNICAL SCIENCES. 2019;:9-9..

Bugarčić, Mladen, Perendija, Jovana, Milošević, Milena, Milošević, Dragana, Obradović, Milena, Karić, Nataša, Marinković, Aleksandar, "Nickel removal from aqueous solution using composite based on magnetite/expanded vermiculite" in 6th INTERNATIONAL STUDENT CONFERENCE ON TECHNICAL SCIENCES (2019):9-9.

TY  - CONF
AU  - Kovačina, Jovanka
AU  - Milošević, Milena
AU  - Božić, Aleksandra
AU  - Jovanović, Aleksandar
AU  - Marinković, Aleksandar
AU  - Onjia, Antonije
AU  - Povrenović, Dragan
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1027
AB  - Usled razvoja industrije i rastom populacije tokom poslednjih godina javljaju se
problemi u vezi sa otpadnim vodama iz proizvodnje koje je neophodno rešavati na ekološki i
ekonomičan način. Sve otpadne vode iz postrojenja bez obzira kako su nastale sadrže štetne
materije koje mogu da imaju i određen stepen toksičnih primesa, moraju se prečistiti ako njihov
kvalitet ne odgovara zakonskim okvirima. Svrha tretmana otpadnih voda je uklanjanje štetnih
materija čime se postiže smanjnje stepena njene zagađenosti, a istovremeno se ostvaruje i određen
ekonomski i ekološki efekat, stoga je u ovom radu izvršeno prečišćavanje otpadne vode postupkom
taloženja upotrebom kalcijum-oksida u cilju uklanjanja koloidnih materija i teških metala. Većina
zagađujućih materija su organskog porekla i njihovo ukljanjanje vršiće se primenom naprednih
oksidacionih procesa korišćenjem ozona i ozona u kombinaciji sa ultrazvukom u cilju postizanja
kvaliteta vode koji odgovara zakonskoj regulativi. Proces prečišćavanja će se optimizovati u
odnosu na tehnološki postupak, koncentraciju, vreme tretmana i količinu primenjenog oksidacionog
sredstva. Stepen zagađenosti vode organskim jedinjenjima će se određivati na osnovu merenja
HPK, BPK i koncentracije teških metala (olovo, gvožđe, hrom, bakar, cink, aluminijum).
AB  - Due to the development of industry and population growth during the in recent years,
there are problems with wastewater from production that needs to be addressed in an
environmentally and economical way. All wastewaters from industry, no matter how they are
created, contain harmful substances that may have some degree of toxicity, must be treated if their
quality does not meet the legal requirements. The purpose of wastewater treatment is to remove
harmful substances, thereby reducing its pollution level, and at the same time, it also has a certain
economic and environmental effect. Therefore, wastewater treatment was carried out in this work by precipitation using calcium oxide to remove colloidal substances and heavy metals. Most
pollutants are of organic origin and their removal will be carried in this work out using advanced
oxidation processes using ozone, and ozone in combination with ultrasound to achieve water
quality that complies with the law. The purification process will be optimized with respect to,
method, time and amount of oxidizing agent applied. The degree of pollution of water by organic
compounds will be determined on the basis of measurements of HPK, BOD and the concentration of
heavy metals (lead, ferrum, chromium, copper, zinc, aluminum).
PB  - Beograd : Beogradska politehnika
C3  - Peti naučno-stručni skup Politehnika
T1  - Prečišćavanja otpadnih voda primenom ozonizacije
EP  - 147
SP  - 142
ER  - 

@conference{
author = "Kovačina, Jovanka and Milošević, Milena and Božić, Aleksandra and Jovanović, Aleksandar and Marinković, Aleksandar and Onjia, Antonije and Povrenović, Dragan",
year = "2019",
abstract = "Usled razvoja industrije i rastom populacije tokom poslednjih godina javljaju se
problemi u vezi sa otpadnim vodama iz proizvodnje koje je neophodno rešavati na ekološki i
ekonomičan način. Sve otpadne vode iz postrojenja bez obzira kako su nastale sadrže štetne
materije koje mogu da imaju i određen stepen toksičnih primesa, moraju se prečistiti ako njihov
kvalitet ne odgovara zakonskim okvirima. Svrha tretmana otpadnih voda je uklanjanje štetnih
materija čime se postiže smanjnje stepena njene zagađenosti, a istovremeno se ostvaruje i određen
ekonomski i ekološki efekat, stoga je u ovom radu izvršeno prečišćavanje otpadne vode postupkom
taloženja upotrebom kalcijum-oksida u cilju uklanjanja koloidnih materija i teških metala. Većina
zagađujućih materija su organskog porekla i njihovo ukljanjanje vršiće se primenom naprednih
oksidacionih procesa korišćenjem ozona i ozona u kombinaciji sa ultrazvukom u cilju postizanja
kvaliteta vode koji odgovara zakonskoj regulativi. Proces prečišćavanja će se optimizovati u
odnosu na tehnološki postupak, koncentraciju, vreme tretmana i količinu primenjenog oksidacionog
sredstva. Stepen zagađenosti vode organskim jedinjenjima će se određivati na osnovu merenja
HPK, BPK i koncentracije teških metala (olovo, gvožđe, hrom, bakar, cink, aluminijum)., Due to the development of industry and population growth during the in recent years,
there are problems with wastewater from production that needs to be addressed in an
environmentally and economical way. All wastewaters from industry, no matter how they are
created, contain harmful substances that may have some degree of toxicity, must be treated if their
quality does not meet the legal requirements. The purpose of wastewater treatment is to remove
harmful substances, thereby reducing its pollution level, and at the same time, it also has a certain
economic and environmental effect. Therefore, wastewater treatment was carried out in this work by precipitation using calcium oxide to remove colloidal substances and heavy metals. Most
pollutants are of organic origin and their removal will be carried in this work out using advanced
oxidation processes using ozone, and ozone in combination with ultrasound to achieve water
quality that complies with the law. The purification process will be optimized with respect to,
method, time and amount of oxidizing agent applied. The degree of pollution of water by organic
compounds will be determined on the basis of measurements of HPK, BOD and the concentration of
heavy metals (lead, ferrum, chromium, copper, zinc, aluminum).",
publisher = "Beograd : Beogradska politehnika",
journal = "Peti naučno-stručni skup Politehnika",
title = "Prečišćavanja otpadnih voda primenom ozonizacije",
pages = "147-142"
}

Kovačina, J., Milošević, M., Božić, A., Jovanović, A., Marinković, A., Onjia, A.,& Povrenović, D.. (2019). Prečišćavanja otpadnih voda primenom ozonizacije. in Peti naučno-stručni skup Politehnika
Beograd : Beogradska politehnika., 142-147.

Kovačina J, Milošević M, Božić A, Jovanović A, Marinković A, Onjia A, Povrenović D. Prečišćavanja otpadnih voda primenom ozonizacije. in Peti naučno-stručni skup Politehnika. 2019;:142-147..

Kovačina, Jovanka, Milošević, Milena, Božić, Aleksandra, Jovanović, Aleksandar, Marinković, Aleksandar, Onjia, Antonije, Povrenović, Dragan, "Prečišćavanja otpadnih voda primenom ozonizacije" in Peti naučno-stručni skup Politehnika (2019):142-147.