TY  - JOUR
AU  - Gulicovski, Jelena
AU  - Stojmenović, Marija
AU  - Rosić, Milena
AU  - Vasić, Andrijana
AU  - Ristović, Ivica
AU  - Janković-Častvan, Ivona
AU  - Kragović, Milan
PY  - 2024
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7472
AB  - The possibility of using waste tailings produced by flotation in the lead and zinc mine of Grot, Serbia as a potential source of secondary mineral raw materials was examined. The aim of the research was primarily to carry out a detailed characterization in order to determine the dominant minerals, and, for the first time, to trace the changes occurring in the unit cells of the minerals present in that deposit. There was also a need to determine the exact proportions of the present mineral phases for their further application and utilization as natural resources in environmental protection. Samples were taken from three different sections of tailings: the crest of dam (JKB), outlet pipe of the flotation facility (JOF) and hydrocyclone overflow (JHC). Granulometric separation was performed to facilitate the extraction of certain minerals from waste. The results showed that all samples mainly contained quartz, clinochlore, calcite, albite, pyrite and biotite, but their ratios in each sample varied significantly. After characterization, samples were separated into different fractions and their mineralogical compositions were determined. Depending on the fraction, the mineralogical compositions also changed. Mineralogy and geochemical analysis indicate that waste tailings can be used as a secondary mineral raw materials source applicable in various industries.
PB  - MDPI
T2  - Applied Sciences
T1  - Mineralogical Characterization of the Grot Lead and Zinc Mine Tailings from Aspects of Their Further Use as Raw Material
IS  - 3
SP  - 1167
VL  - 14
DO  - 10.3390/app14031167
ER  - 

@article{
author = "Gulicovski, Jelena and Stojmenović, Marija and Rosić, Milena and Vasić, Andrijana and Ristović, Ivica and Janković-Častvan, Ivona and Kragović, Milan",
year = "2024",
abstract = "The possibility of using waste tailings produced by flotation in the lead and zinc mine of Grot, Serbia as a potential source of secondary mineral raw materials was examined. The aim of the research was primarily to carry out a detailed characterization in order to determine the dominant minerals, and, for the first time, to trace the changes occurring in the unit cells of the minerals present in that deposit. There was also a need to determine the exact proportions of the present mineral phases for their further application and utilization as natural resources in environmental protection. Samples were taken from three different sections of tailings: the crest of dam (JKB), outlet pipe of the flotation facility (JOF) and hydrocyclone overflow (JHC). Granulometric separation was performed to facilitate the extraction of certain minerals from waste. The results showed that all samples mainly contained quartz, clinochlore, calcite, albite, pyrite and biotite, but their ratios in each sample varied significantly. After characterization, samples were separated into different fractions and their mineralogical compositions were determined. Depending on the fraction, the mineralogical compositions also changed. Mineralogy and geochemical analysis indicate that waste tailings can be used as a secondary mineral raw materials source applicable in various industries.",
publisher = "MDPI",
journal = "Applied Sciences",
title = "Mineralogical Characterization of the Grot Lead and Zinc Mine Tailings from Aspects of Their Further Use as Raw Material",
number = "3",
pages = "1167",
volume = "14",
doi = "10.3390/app14031167"
}

Gulicovski, J., Stojmenović, M., Rosić, M., Vasić, A., Ristović, I., Janković-Častvan, I.,& Kragović, M.. (2024). Mineralogical Characterization of the Grot Lead and Zinc Mine Tailings from Aspects of Their Further Use as Raw Material. in Applied Sciences
MDPI., 14(3), 1167.
https://doi.org/10.3390/app14031167

Gulicovski J, Stojmenović M, Rosić M, Vasić A, Ristović I, Janković-Častvan I, Kragović M. Mineralogical Characterization of the Grot Lead and Zinc Mine Tailings from Aspects of Their Further Use as Raw Material. in Applied Sciences. 2024;14(3):1167.
doi:10.3390/app14031167 .

Gulicovski, Jelena, Stojmenović, Marija, Rosić, Milena, Vasić, Andrijana, Ristović, Ivica, Janković-Častvan, Ivona, Kragović, Milan, "Mineralogical Characterization of the Grot Lead and Zinc Mine Tailings from Aspects of Their Further Use as Raw Material" in Applied Sciences, 14, no. 3 (2024):1167,
https://doi.org/10.3390/app14031167 . .

TY  - JOUR
AU  - Gulicovski, Jelena
AU  - Kragović, Milan
AU  - Nikolić, Katarina
AU  - Rosić, Milena
AU  - Ristić, Nenad
AU  - Janković-Častvan, Ivona
AU  - Stojmenović, Marija
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6588
AB  - Waste vitreous enamels from the heating device production process were used for partial replacement of cement in the mortar and concrete production industry. This waste, due to the high content of heavy metals, is classified as hazardous waste. At the same time, waste vitreous enamels possess pozzolanic activity and belong to class 15 (WEP—generated during the production process of heating devices, premix technology), that is 5 (WETM—generated during the production process of heating devices, classic technology) of pozzolanic materials. The purpose of this research was to develop new composites from these wastes to reduce the deposition of the toxic compounds and reduce their environmental impact. The chemical and physical-chemical characterization and pozzolanic activity of the raw waste materials were studied by a mixture of complementary methods, as well as physical-mechanical characterization and a leaching test of mortar and concrete composites. The results indicate that the replacement of cement with WEP up to 30%, or with WETM up to 20% does not significantly affect the quality of concrete in comparison to the quality of the reference concrete prepared with 100% cement. The leaching test showed no significant release of toxic elements for both obtained composites.
PB  - MDPI
T2  - Applied Sciences (Switzerland)
T1  - Possibility of Using Vitreous Enamel Waste in the Construction Industry as the Concept of Cleaner Production
IS  - 14
SP  - 8215
VL  - 13
DO  - 10.3390/app13148215
ER  - 

@article{
author = "Gulicovski, Jelena and Kragović, Milan and Nikolić, Katarina and Rosić, Milena and Ristić, Nenad and Janković-Častvan, Ivona and Stojmenović, Marija",
year = "2023",
abstract = "Waste vitreous enamels from the heating device production process were used for partial replacement of cement in the mortar and concrete production industry. This waste, due to the high content of heavy metals, is classified as hazardous waste. At the same time, waste vitreous enamels possess pozzolanic activity and belong to class 15 (WEP—generated during the production process of heating devices, premix technology), that is 5 (WETM—generated during the production process of heating devices, classic technology) of pozzolanic materials. The purpose of this research was to develop new composites from these wastes to reduce the deposition of the toxic compounds and reduce their environmental impact. The chemical and physical-chemical characterization and pozzolanic activity of the raw waste materials were studied by a mixture of complementary methods, as well as physical-mechanical characterization and a leaching test of mortar and concrete composites. The results indicate that the replacement of cement with WEP up to 30%, or with WETM up to 20% does not significantly affect the quality of concrete in comparison to the quality of the reference concrete prepared with 100% cement. The leaching test showed no significant release of toxic elements for both obtained composites.",
publisher = "MDPI",
journal = "Applied Sciences (Switzerland)",
title = "Possibility of Using Vitreous Enamel Waste in the Construction Industry as the Concept of Cleaner Production",
number = "14",
pages = "8215",
volume = "13",
doi = "10.3390/app13148215"
}

Gulicovski, J., Kragović, M., Nikolić, K., Rosić, M., Ristić, N., Janković-Častvan, I.,& Stojmenović, M.. (2023). Possibility of Using Vitreous Enamel Waste in the Construction Industry as the Concept of Cleaner Production. in Applied Sciences (Switzerland)
MDPI., 13(14), 8215.
https://doi.org/10.3390/app13148215

Gulicovski J, Kragović M, Nikolić K, Rosić M, Ristić N, Janković-Častvan I, Stojmenović M. Possibility of Using Vitreous Enamel Waste in the Construction Industry as the Concept of Cleaner Production. in Applied Sciences (Switzerland). 2023;13(14):8215.
doi:10.3390/app13148215 .

Gulicovski, Jelena, Kragović, Milan, Nikolić, Katarina, Rosić, Milena, Ristić, Nenad, Janković-Častvan, Ivona, Stojmenović, Marija, "Possibility of Using Vitreous Enamel Waste in the Construction Industry as the Concept of Cleaner Production" in Applied Sciences (Switzerland), 13, no. 14 (2023):8215,
https://doi.org/10.3390/app13148215 . .

TY  - JOUR
AU  - Mladenović, Nataša N.
AU  - Kljajević, Ljiljana M.
AU  - Nenadović, Snežana S.
AU  - Ivanović, Marija D.
AU  - Čalija, Bojan
AU  - Gulicovski, Jelena
AU  - Trivunac, Katarina
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4492
AB  - Fundamental research of inorganic polymers prepared from available aluminosilicate precursors represent an innovative class of materials characterized by low energy consumption for production. This is just one of the reasons why their use is focused in protecting the environment for removing of heavy metals from aqueous solutions. The concentration of hydroxide as activator solution plays an important role in the geopolymerization process. The present study examined the use of geopolymer materials, obtained in reaction of geopolymerizations of metakaolin as precursor activated with NaOH concentration 2.0, 4.0, 6.0 and 8.0 mol/dm(3) for removal of cadmium ions from aqueous solutions. The structure and properties of the obtained geopolymer samples were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and diffuse reflection infrared spectroscopy (DRIFTS). To investigate the surface charge of geopolymers the zeta potential measurements were performed. Batch adsorption experiments conducted at room temperature (23 +/- 1 degrees C) showed that the adsorption pattern followed the Freundlich isotherm model. The maximum removal of cadmium obtained from batch studies was 84.1% for GP6M at pH approximate to 6.7. The results generally showed that geopolymer samples could be considered as a potential adsorbent for cadmium removal from aqueous solutions.
PB  - Springer, Dordrecht
T2  - Journal of Inorganic and Organometallic Polymers and Materials
T1  - The Applications of New Inorganic Polymer for Adsorption Cadmium from Waste Water
EP  - 563
IS  - 2
SP  - 554
VL  - 30
DO  - 10.1007/s10904-019-01215-y
ER  - 

@article{
author = "Mladenović, Nataša N. and Kljajević, Ljiljana M. and Nenadović, Snežana S. and Ivanović, Marija D. and Čalija, Bojan and Gulicovski, Jelena and Trivunac, Katarina",
year = "2020",
abstract = "Fundamental research of inorganic polymers prepared from available aluminosilicate precursors represent an innovative class of materials characterized by low energy consumption for production. This is just one of the reasons why their use is focused in protecting the environment for removing of heavy metals from aqueous solutions. The concentration of hydroxide as activator solution plays an important role in the geopolymerization process. The present study examined the use of geopolymer materials, obtained in reaction of geopolymerizations of metakaolin as precursor activated with NaOH concentration 2.0, 4.0, 6.0 and 8.0 mol/dm(3) for removal of cadmium ions from aqueous solutions. The structure and properties of the obtained geopolymer samples were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and diffuse reflection infrared spectroscopy (DRIFTS). To investigate the surface charge of geopolymers the zeta potential measurements were performed. Batch adsorption experiments conducted at room temperature (23 +/- 1 degrees C) showed that the adsorption pattern followed the Freundlich isotherm model. The maximum removal of cadmium obtained from batch studies was 84.1% for GP6M at pH approximate to 6.7. The results generally showed that geopolymer samples could be considered as a potential adsorbent for cadmium removal from aqueous solutions.",
publisher = "Springer, Dordrecht",
journal = "Journal of Inorganic and Organometallic Polymers and Materials",
title = "The Applications of New Inorganic Polymer for Adsorption Cadmium from Waste Water",
pages = "563-554",
number = "2",
volume = "30",
doi = "10.1007/s10904-019-01215-y"
}

Mladenović, N. N., Kljajević, L. M., Nenadović, S. S., Ivanović, M. D., Čalija, B., Gulicovski, J.,& Trivunac, K.. (2020). The Applications of New Inorganic Polymer for Adsorption Cadmium from Waste Water. in Journal of Inorganic and Organometallic Polymers and Materials
Springer, Dordrecht., 30(2), 554-563.
https://doi.org/10.1007/s10904-019-01215-y

Mladenović NN, Kljajević LM, Nenadović SS, Ivanović MD, Čalija B, Gulicovski J, Trivunac K. The Applications of New Inorganic Polymer for Adsorption Cadmium from Waste Water. in Journal of Inorganic and Organometallic Polymers and Materials. 2020;30(2):554-563.
doi:10.1007/s10904-019-01215-y .

Mladenović, Nataša N., Kljajević, Ljiljana M., Nenadović, Snežana S., Ivanović, Marija D., Čalija, Bojan, Gulicovski, Jelena, Trivunac, Katarina, "The Applications of New Inorganic Polymer for Adsorption Cadmium from Waste Water" in Journal of Inorganic and Organometallic Polymers and Materials, 30, no. 2 (2020):554-563,
https://doi.org/10.1007/s10904-019-01215-y . .

TY  - JOUR
AU  - Ivanović, Marija
AU  - Kljajević, Ljiljana M.
AU  - Gulicovski, Jelena
AU  - Petković, Marijana
AU  - Janković-Častvan, Ivona
AU  - Bučevac, Dušan
AU  - Nenadović, Snežana S.
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4363
AB  - This paper outlines the production of an inorganic polymer/geopolymer using a metakaolin by an environmental friendly, energy saving, clean technology to conserve natural environment and resources. The influence of alkali activation, i.e. different concentration of NaOH as a component of alkali activator mixture on the process of geopolymerization of metakaolin is investigated. Also, process of aging time of geopolymer is followed by several analytical methods. The structure of metakaolin and metakaolin based geopolymers and their physicochemical properties were studied using X-ray diffraction (XRD), Fourier transformation infrared spectroscopy (FTIR) and after 28 days scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS) was applied for the surface characterization of the samples. A shift of the Si-O or Si-O-X (X=Al, Si, Na...) bands as the molarity of activator increasing during geopolymerization process was observed by FTIR. Mass spectra of geopolymers were characterized by MALDI TOF mass spectrometer. Structural reorganization of geopolymer samples occurs during the curing/aging in accordance with a geopolymerization mechanism.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - The Effect of the Concentration of Alkaline Activator and Aging Time on the Structure of Metakaolin Based Geopolymer
EP  - 229
IS  - 2
SP  - 219
VL  - 52
DO  - 10.2298/SOS2002219I
ER  - 

@article{
author = "Ivanović, Marija and Kljajević, Ljiljana M. and Gulicovski, Jelena and Petković, Marijana and Janković-Častvan, Ivona and Bučevac, Dušan and Nenadović, Snežana S.",
year = "2020",
abstract = "This paper outlines the production of an inorganic polymer/geopolymer using a metakaolin by an environmental friendly, energy saving, clean technology to conserve natural environment and resources. The influence of alkali activation, i.e. different concentration of NaOH as a component of alkali activator mixture on the process of geopolymerization of metakaolin is investigated. Also, process of aging time of geopolymer is followed by several analytical methods. The structure of metakaolin and metakaolin based geopolymers and their physicochemical properties were studied using X-ray diffraction (XRD), Fourier transformation infrared spectroscopy (FTIR) and after 28 days scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS) was applied for the surface characterization of the samples. A shift of the Si-O or Si-O-X (X=Al, Si, Na...) bands as the molarity of activator increasing during geopolymerization process was observed by FTIR. Mass spectra of geopolymers were characterized by MALDI TOF mass spectrometer. Structural reorganization of geopolymer samples occurs during the curing/aging in accordance with a geopolymerization mechanism.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "The Effect of the Concentration of Alkaline Activator and Aging Time on the Structure of Metakaolin Based Geopolymer",
pages = "229-219",
number = "2",
volume = "52",
doi = "10.2298/SOS2002219I"
}

Ivanović, M., Kljajević, L. M., Gulicovski, J., Petković, M., Janković-Častvan, I., Bučevac, D.,& Nenadović, S. S.. (2020). The Effect of the Concentration of Alkaline Activator and Aging Time on the Structure of Metakaolin Based Geopolymer. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 52(2), 219-229.
https://doi.org/10.2298/SOS2002219I

Ivanović M, Kljajević LM, Gulicovski J, Petković M, Janković-Častvan I, Bučevac D, Nenadović SS. The Effect of the Concentration of Alkaline Activator and Aging Time on the Structure of Metakaolin Based Geopolymer. in Science of Sintering. 2020;52(2):219-229.
doi:10.2298/SOS2002219I .

Ivanović, Marija, Kljajević, Ljiljana M., Gulicovski, Jelena, Petković, Marijana, Janković-Častvan, Ivona, Bučevac, Dušan, Nenadović, Snežana S., "The Effect of the Concentration of Alkaline Activator and Aging Time on the Structure of Metakaolin Based Geopolymer" in Science of Sintering, 52, no. 2 (2020):219-229,
https://doi.org/10.2298/SOS2002219I . .

TY  - JOUR
AU  - Mladenović, Nataša N.
AU  - Ivanović, Marija M.
AU  - Kljajević, Ljiljana M.
AU  - Gulicovski, Jelena
AU  - Nenadović, Snežana S.
AU  - Trivunac, Katarina
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4298
AB  - Continuous development of new technologies leads to increasing pollution of water, thus creating the need for new materials that could be used in the processes of its purification. Therefore, adsorbents prepared from agricultural waste, resins, silica gels, zeolites, clays, flying ash, aluminosilicates and other materials are being investigated as potential sorbents. Recently, research has focused on improving the adsorption capacity by modifying the material by binding or impregnating inorganic and organic molecules on the surface. In this paper, the kaolinite modification with amino acids, histidine and cysteine, was performed to improve the efficiency of adsorption of cadmium ion. Cation exchange capacity (CEC) of raw and modified kaolinite was determined by titration with methylene blue. The influence of operating parameters, such as adsorption time, pH value of the solution, initial metal concentration and temperature, on the capacity and adsorption efficiency were examined. Better agreement of experimental results with Freundlich's adsorption isotherm and the pseudo-second order kinetics model suggest that the adsorption of cadmium ions on the investigated adsorbents takes place by chemisorption mechanism. The change of Gibbs free energy has a negative value for both adsorbents, which shows that the adsorption process is spontaneous. The efficacy of cadmium removal from the aqueous solution onto histidine-modified kaolinite increased from 78.6% to 91.8%.
AB  - Kontinualan razvoj novih tehnologija dovodi do povećanog zagađenja vode, čime se stvara potreba za novim materijalima koji se mogu koristiti u procesima prečišćavanja. Kao potencijalni, istražuju se adsorbenti pripremljeni od poljoprivrednog otpada, smola, silika gela, zeolita, gline, letećeg pepela, aluminosilikata i drugih materijala. Nedavna istraživanja su se fokusirala na poboljšanje adsorpcionog kapaciteta modifikovanjem materijala vezivanjem ili impregnacijom neorganskih i organskih molekula na površini. U ovom radu izvršena je modifikacija kaolinita aminokiselinama, histidinom i cisteinom, kako bi se poboljšala efikasnost adsorpcije jona kadmijuma. Kapacitet izmene katjona (CEC) sirovog i modifikovanog kaolinita određen je titracijom sa metilenskim plavim. Ispitivan je uticaj radnih parametara, kao što su vreme adsorpcije, pH vrednost rastvora, početna koncentracija metala, i temperatura, na kapacitet i efikasnost adsorpcije. Bolje slaganje eksperimentalnih rezultata sa Freundlich-ovom adsorpcionom izotermom i kinetičkim modelom pseudo-drugog reda sugeriše da se adsorpcija kadmijumovih jona na ispitivanim adsorbentima odvija putem hemisorpcionog mehanizma. Promena Gibsove slobodne energije ima negativnu vrednost za oba adsorbenta, što pokazuje da je proces adsorpcije spontan. Efikasnost uklanjanja kadmijuma iz vodenog rastvora na kaolinitu modifikovanim histidinom povećava se sa 78,6% na 91,8%.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Adsorption study of cadmium ions on kaolinite modified by histidine and cysteine
T1  - Adsorpcija kadmijumovih jona na kaolinitu modifikovanim histidinom i cisteinom
EP  - 22
IS  - 1
SP  - 15
VL  - 74
DO  - 10.5937/tehnika1901015M
ER  - 

@article{
author = "Mladenović, Nataša N. and Ivanović, Marija M. and Kljajević, Ljiljana M. and Gulicovski, Jelena and Nenadović, Snežana S. and Trivunac, Katarina",
year = "2019",
abstract = "Continuous development of new technologies leads to increasing pollution of water, thus creating the need for new materials that could be used in the processes of its purification. Therefore, adsorbents prepared from agricultural waste, resins, silica gels, zeolites, clays, flying ash, aluminosilicates and other materials are being investigated as potential sorbents. Recently, research has focused on improving the adsorption capacity by modifying the material by binding or impregnating inorganic and organic molecules on the surface. In this paper, the kaolinite modification with amino acids, histidine and cysteine, was performed to improve the efficiency of adsorption of cadmium ion. Cation exchange capacity (CEC) of raw and modified kaolinite was determined by titration with methylene blue. The influence of operating parameters, such as adsorption time, pH value of the solution, initial metal concentration and temperature, on the capacity and adsorption efficiency were examined. Better agreement of experimental results with Freundlich's adsorption isotherm and the pseudo-second order kinetics model suggest that the adsorption of cadmium ions on the investigated adsorbents takes place by chemisorption mechanism. The change of Gibbs free energy has a negative value for both adsorbents, which shows that the adsorption process is spontaneous. The efficacy of cadmium removal from the aqueous solution onto histidine-modified kaolinite increased from 78.6% to 91.8%., Kontinualan razvoj novih tehnologija dovodi do povećanog zagađenja vode, čime se stvara potreba za novim materijalima koji se mogu koristiti u procesima prečišćavanja. Kao potencijalni, istražuju se adsorbenti pripremljeni od poljoprivrednog otpada, smola, silika gela, zeolita, gline, letećeg pepela, aluminosilikata i drugih materijala. Nedavna istraživanja su se fokusirala na poboljšanje adsorpcionog kapaciteta modifikovanjem materijala vezivanjem ili impregnacijom neorganskih i organskih molekula na površini. U ovom radu izvršena je modifikacija kaolinita aminokiselinama, histidinom i cisteinom, kako bi se poboljšala efikasnost adsorpcije jona kadmijuma. Kapacitet izmene katjona (CEC) sirovog i modifikovanog kaolinita određen je titracijom sa metilenskim plavim. Ispitivan je uticaj radnih parametara, kao što su vreme adsorpcije, pH vrednost rastvora, početna koncentracija metala, i temperatura, na kapacitet i efikasnost adsorpcije. Bolje slaganje eksperimentalnih rezultata sa Freundlich-ovom adsorpcionom izotermom i kinetičkim modelom pseudo-drugog reda sugeriše da se adsorpcija kadmijumovih jona na ispitivanim adsorbentima odvija putem hemisorpcionog mehanizma. Promena Gibsove slobodne energije ima negativnu vrednost za oba adsorbenta, što pokazuje da je proces adsorpcije spontan. Efikasnost uklanjanja kadmijuma iz vodenog rastvora na kaolinitu modifikovanim histidinom povećava se sa 78,6% na 91,8%.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Adsorption study of cadmium ions on kaolinite modified by histidine and cysteine, Adsorpcija kadmijumovih jona na kaolinitu modifikovanim histidinom i cisteinom",
pages = "22-15",
number = "1",
volume = "74",
doi = "10.5937/tehnika1901015M"
}

Mladenović, N. N., Ivanović, M. M., Kljajević, L. M., Gulicovski, J., Nenadović, S. S.,& Trivunac, K.. (2019). Adsorption study of cadmium ions on kaolinite modified by histidine and cysteine. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 74(1), 15-22.
https://doi.org/10.5937/tehnika1901015M

Mladenović NN, Ivanović MM, Kljajević LM, Gulicovski J, Nenadović SS, Trivunac K. Adsorption study of cadmium ions on kaolinite modified by histidine and cysteine. in Tehnika. 2019;74(1):15-22.
doi:10.5937/tehnika1901015M .

Mladenović, Nataša N., Ivanović, Marija M., Kljajević, Ljiljana M., Gulicovski, Jelena, Nenadović, Snežana S., Trivunac, Katarina, "Adsorption study of cadmium ions on kaolinite modified by histidine and cysteine" in Tehnika, 74, no. 1 (2019):15-22,
https://doi.org/10.5937/tehnika1901015M . .

TY  - JOUR
AU  - Mladenović, Nataša N.
AU  - Ivanović, Marija M.
AU  - Kljajević, Ljiljana M.
AU  - Nenadović, Snežana S.
AU  - Gulicovski, Jelena
AU  - Pavlović, Vera P.
AU  - Trivunac, Katarina
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3806
AB  - Alumosilicate polymers (geopolymers) based on metakaolin as precursor and alkaline activators of different concentrations (2M, 4M, 6M and 8M NaOH/Na2SiO3) were used to remove ions of cadmium from wastewater. Experiments were carried out in a batch process at room temperature (23 ± 1 ° C) for different operating parameters: adsorption time, pH value of solution, initial concentration of metal and mass of adsorbents. It was found that the optimum pH value for all adsorbents is above 6.0. The adsorption efficiency increases with increasing pH of the solution. With an increase in the initial concentration of cadmium, the adsorption capacity increases and reaches a value of over 200.0 mg/g. The experimental results have better agreement with Freundlich's adsorption isotherm (surface heterogeneity, hemisorption mechanism) and the pseudo-second order model (the principle of the chemisorption mechanism and adsorption rate depend on the adsorbent concentration). Alumosilicate geopolymer samples were characterized using X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Fourier-Transform Infrared Spectroscopy (FTIR).
AB  - Za uklanjanje jona kadmijuma iz otpadnih voda korišćeni su alumosilikatni polimeri (geopolimeri) na bazi metakaolina kao prekursora i alkalni aktivator različitih koncentracija (2M, 4M, 6M i 8M NaOH/ Na2SiO3). Eksperimenti su vršeni u šaržnom procesu na sobnoj temperaturi (23±1 °C) pri različitim radnim parametrima: vreme adsorpcije, pH vrednost rastvora, početna koncentracija metala i masa adsorbenata. Utvrđeno je da je optimalna pH vrednost za sve adsorbente iznad 6,0. Efikasnost adsorpcije raste sa porastom pH vrednosti rastvora. Sa povećanjem početne koncentracije kadmijuma raste adsorpcioni kapacitet i dostiže vrednost preko 200,0 mg/g. Ekperimentalni rezultati su pokazali dobro slaganje sa Freundlich-ovom adsorpcionom izotermom i modelom pseudo-drugog reda. Karakterizacija geopolimera urađena je pomoću rendgenske difrakcije (XRD), skenirajuće elektronske mikroskopije (SEM) i infracrvene spektroskopije sa Furijeovom transformacijom (FTIR).
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Application of alumosilicate polymers based on metakaolin in adsorption of cadmium ions from wastewater
T1  - Primena alumosilikatnih polimera na bazi metakaolina u adsorpciji jona kadmijuma iz otpadnih voda
EP  - 756
IS  - 6
SP  - 749
VL  - 73
DO  - 10.5937/tehnika1806749M
ER  - 

@article{
author = "Mladenović, Nataša N. and Ivanović, Marija M. and Kljajević, Ljiljana M. and Nenadović, Snežana S. and Gulicovski, Jelena and Pavlović, Vera P. and Trivunac, Katarina",
year = "2018",
abstract = "Alumosilicate polymers (geopolymers) based on metakaolin as precursor and alkaline activators of different concentrations (2M, 4M, 6M and 8M NaOH/Na2SiO3) were used to remove ions of cadmium from wastewater. Experiments were carried out in a batch process at room temperature (23 ± 1 ° C) for different operating parameters: adsorption time, pH value of solution, initial concentration of metal and mass of adsorbents. It was found that the optimum pH value for all adsorbents is above 6.0. The adsorption efficiency increases with increasing pH of the solution. With an increase in the initial concentration of cadmium, the adsorption capacity increases and reaches a value of over 200.0 mg/g. The experimental results have better agreement with Freundlich's adsorption isotherm (surface heterogeneity, hemisorption mechanism) and the pseudo-second order model (the principle of the chemisorption mechanism and adsorption rate depend on the adsorbent concentration). Alumosilicate geopolymer samples were characterized using X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Fourier-Transform Infrared Spectroscopy (FTIR)., Za uklanjanje jona kadmijuma iz otpadnih voda korišćeni su alumosilikatni polimeri (geopolimeri) na bazi metakaolina kao prekursora i alkalni aktivator različitih koncentracija (2M, 4M, 6M i 8M NaOH/ Na2SiO3). Eksperimenti su vršeni u šaržnom procesu na sobnoj temperaturi (23±1 °C) pri različitim radnim parametrima: vreme adsorpcije, pH vrednost rastvora, početna koncentracija metala i masa adsorbenata. Utvrđeno je da je optimalna pH vrednost za sve adsorbente iznad 6,0. Efikasnost adsorpcije raste sa porastom pH vrednosti rastvora. Sa povećanjem početne koncentracije kadmijuma raste adsorpcioni kapacitet i dostiže vrednost preko 200,0 mg/g. Ekperimentalni rezultati su pokazali dobro slaganje sa Freundlich-ovom adsorpcionom izotermom i modelom pseudo-drugog reda. Karakterizacija geopolimera urađena je pomoću rendgenske difrakcije (XRD), skenirajuće elektronske mikroskopije (SEM) i infracrvene spektroskopije sa Furijeovom transformacijom (FTIR).",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Application of alumosilicate polymers based on metakaolin in adsorption of cadmium ions from wastewater, Primena alumosilikatnih polimera na bazi metakaolina u adsorpciji jona kadmijuma iz otpadnih voda",
pages = "756-749",
number = "6",
volume = "73",
doi = "10.5937/tehnika1806749M"
}

Mladenović, N. N., Ivanović, M. M., Kljajević, L. M., Nenadović, S. S., Gulicovski, J., Pavlović, V. P.,& Trivunac, K.. (2018). Application of alumosilicate polymers based on metakaolin in adsorption of cadmium ions from wastewater. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 73(6), 749-756.
https://doi.org/10.5937/tehnika1806749M

Mladenović NN, Ivanović MM, Kljajević LM, Nenadović SS, Gulicovski J, Pavlović VP, Trivunac K. Application of alumosilicate polymers based on metakaolin in adsorption of cadmium ions from wastewater. in Tehnika. 2018;73(6):749-756.
doi:10.5937/tehnika1806749M .

Mladenović, Nataša N., Ivanović, Marija M., Kljajević, Ljiljana M., Nenadović, Snežana S., Gulicovski, Jelena, Pavlović, Vera P., Trivunac, Katarina, "Application of alumosilicate polymers based on metakaolin in adsorption of cadmium ions from wastewater" in Tehnika, 73, no. 6 (2018):749-756,
https://doi.org/10.5937/tehnika1806749M . .

TY  - JOUR
AU  - Trivunac, Katarina
AU  - Kljajević, Ljiljana M.
AU  - Nenadović, Snežana S.
AU  - Gulicovski, Jelena
AU  - Mirković, Miljana M.
AU  - Babić, Biljana M.
AU  - Stevanović, Slavica
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3340
AB  - The microstructural characterization and adsorption properties of metakaolin (MK) and alkali-activated metakaolin, known as geopolymer materials (GP) were investigated. The structure and properties of the metakaolin and obtained geopolymer were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. Furthermore, based on the analysis of adsorption efficiency, microstructure and mineral structure, the difference between geopolymer and metakaolin on the performance of immobilizing heavy metals have been discussed. The kinetics of adsorption can be represented by pseudo-second order equation. The results of lead ions adsorption experiments were best fitted by Freundlich adsorption isotherm for both investigated adsorbents. The highest removal efficiencies of alkali-activated material based on metakaolin was found 97.5% at pH 4 and metakaolin removal efficiencies was found 92% at pH 5.5.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Microstructural Characterization and Adsorption Properties of Alkali-Activated Materials Based on Metakaolin
EP  - 220
IS  - 2
SP  - 209
VL  - 48
DO  - 10.2298/SOS1602209T
ER  - 

@article{
author = "Trivunac, Katarina and Kljajević, Ljiljana M. and Nenadović, Snežana S. and Gulicovski, Jelena and Mirković, Miljana M. and Babić, Biljana M. and Stevanović, Slavica",
year = "2016",
abstract = "The microstructural characterization and adsorption properties of metakaolin (MK) and alkali-activated metakaolin, known as geopolymer materials (GP) were investigated. The structure and properties of the metakaolin and obtained geopolymer were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. Furthermore, based on the analysis of adsorption efficiency, microstructure and mineral structure, the difference between geopolymer and metakaolin on the performance of immobilizing heavy metals have been discussed. The kinetics of adsorption can be represented by pseudo-second order equation. The results of lead ions adsorption experiments were best fitted by Freundlich adsorption isotherm for both investigated adsorbents. The highest removal efficiencies of alkali-activated material based on metakaolin was found 97.5% at pH 4 and metakaolin removal efficiencies was found 92% at pH 5.5.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Microstructural Characterization and Adsorption Properties of Alkali-Activated Materials Based on Metakaolin",
pages = "220-209",
number = "2",
volume = "48",
doi = "10.2298/SOS1602209T"
}

Trivunac, K., Kljajević, L. M., Nenadović, S. S., Gulicovski, J., Mirković, M. M., Babić, B. M.,& Stevanović, S.. (2016). Microstructural Characterization and Adsorption Properties of Alkali-Activated Materials Based on Metakaolin. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 48(2), 209-220.
https://doi.org/10.2298/SOS1602209T

Trivunac K, Kljajević LM, Nenadović SS, Gulicovski J, Mirković MM, Babić BM, Stevanović S. Microstructural Characterization and Adsorption Properties of Alkali-Activated Materials Based on Metakaolin. in Science of Sintering. 2016;48(2):209-220.
doi:10.2298/SOS1602209T .

Trivunac, Katarina, Kljajević, Ljiljana M., Nenadović, Snežana S., Gulicovski, Jelena, Mirković, Miljana M., Babić, Biljana M., Stevanović, Slavica, "Microstructural Characterization and Adsorption Properties of Alkali-Activated Materials Based on Metakaolin" in Science of Sintering, 48, no. 2 (2016):209-220,
https://doi.org/10.2298/SOS1602209T . .

TY  - JOUR
AU  - Gulicovski, Jelena
AU  - Bajat, Jelena
AU  - Jokić, Bojan
AU  - Panić, V.
AU  - Mišković-Stanković, Vesna
AU  - Milonjić, Slobodan K.
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3375
AB  - Ceria coating is formed on Al from the ceria sol prepared exclusively by forced hydrolysis of Ce(NO3)(4), in order to test their ability to protect Al from corrosion. The characterization of sol-gel-processed ceria coating and coating/Al assembly brings new issues on Al corrosion and protection caused by unique properties of the sol-gel coating. The corrosion behaviour of bare Al and Al/CeO2 is investigated by the electrochemical impedance spectroscopy (EIS) during the exposure to NaCl aqueous solution. The morphology and composition of the samples are examined by scanning electron microscopy and energy dispersive spectroscopy. EIS data showed greater corrosion resistance of CeO2-coated aluminium in comparison to bare Al at long exposure times. CeO2 coating does not hinder completely the corrosion processes on Al. The Al beneath CeO2 coating is subjected to intrinsic formation of a uniform protective coating/Al interphase, cross-linked by AlO(OH) fibre-like structures. They appear created by corrosive medium from the coating reversely gelled by NaCl solution. As the fibre network is created during exposure, Al becomes better protected than by spontaneous formation of porous passive layer of Al(OH)(3) on bare aluminium. Sol-gel ceria coatings thus improve corrosion resistance of aluminium during prolonged exposure to corrosive medium.
PB  - Springer, New York
T2  - Journal of Solid State Electrochemistry
T1  - Protective ability and impedance response of sol-gel reversely transformed ceria conversion coating on aluminium
EP  - 303
IS  - 1
SP  - 293
VL  - 20
DO  - 10.1007/s10008-015-3040-3
ER  - 

@article{
author = "Gulicovski, Jelena and Bajat, Jelena and Jokić, Bojan and Panić, V. and Mišković-Stanković, Vesna and Milonjić, Slobodan K.",
year = "2016",
abstract = "Ceria coating is formed on Al from the ceria sol prepared exclusively by forced hydrolysis of Ce(NO3)(4), in order to test their ability to protect Al from corrosion. The characterization of sol-gel-processed ceria coating and coating/Al assembly brings new issues on Al corrosion and protection caused by unique properties of the sol-gel coating. The corrosion behaviour of bare Al and Al/CeO2 is investigated by the electrochemical impedance spectroscopy (EIS) during the exposure to NaCl aqueous solution. The morphology and composition of the samples are examined by scanning electron microscopy and energy dispersive spectroscopy. EIS data showed greater corrosion resistance of CeO2-coated aluminium in comparison to bare Al at long exposure times. CeO2 coating does not hinder completely the corrosion processes on Al. The Al beneath CeO2 coating is subjected to intrinsic formation of a uniform protective coating/Al interphase, cross-linked by AlO(OH) fibre-like structures. They appear created by corrosive medium from the coating reversely gelled by NaCl solution. As the fibre network is created during exposure, Al becomes better protected than by spontaneous formation of porous passive layer of Al(OH)(3) on bare aluminium. Sol-gel ceria coatings thus improve corrosion resistance of aluminium during prolonged exposure to corrosive medium.",
publisher = "Springer, New York",
journal = "Journal of Solid State Electrochemistry",
title = "Protective ability and impedance response of sol-gel reversely transformed ceria conversion coating on aluminium",
pages = "303-293",
number = "1",
volume = "20",
doi = "10.1007/s10008-015-3040-3"
}

Gulicovski, J., Bajat, J., Jokić, B., Panić, V., Mišković-Stanković, V.,& Milonjić, S. K.. (2016). Protective ability and impedance response of sol-gel reversely transformed ceria conversion coating on aluminium. in Journal of Solid State Electrochemistry
Springer, New York., 20(1), 293-303.
https://doi.org/10.1007/s10008-015-3040-3

Gulicovski J, Bajat J, Jokić B, Panić V, Mišković-Stanković V, Milonjić SK. Protective ability and impedance response of sol-gel reversely transformed ceria conversion coating on aluminium. in Journal of Solid State Electrochemistry. 2016;20(1):293-303.
doi:10.1007/s10008-015-3040-3 .

Gulicovski, Jelena, Bajat, Jelena, Jokić, Bojan, Panić, V., Mišković-Stanković, Vesna, Milonjić, Slobodan K., "Protective ability and impedance response of sol-gel reversely transformed ceria conversion coating on aluminium" in Journal of Solid State Electrochemistry, 20, no. 1 (2016):293-303,
https://doi.org/10.1007/s10008-015-3040-3 . .

TY  - JOUR
AU  - Gulicovski, Jelena
AU  - Bajat, Jelena
AU  - Mišković-Stanković, Vesna
AU  - Jokić, Bojan
AU  - Panić, Vladimir
AU  - Milonjić, Slobodan K.
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2282
AB  - CeO2 coatings were formed on the aluminum after Al surface preparation, by dripping the ceria sol, pre­viously prepared by forced hydrolysis of Ce(NO3)4. The anticorrosive properties of ceria coatings were investigated by the electrochemical impedance spectroscopy (EIS) during the exposure to 0.03% NaCl. The morphology of the coa­tings was examined by the scanning electron microscopy (SEM). EIS data indicated considerably larger corrosion resistance of CeO2-coated aluminum than for bare Al. The corrosion processes on Al below CeO2 coating are sub­jected to more pronounced diffusion limitations in com­parison to the processes below passive aluminum oxide film, as the consequence of the formation of highly com­pact protective coating. The results show that the deposi­tion of ceria coatings is an effective way to improve corro­sion resistance for aluminum.
PB  - International Association of Physical Chemists (IAPC)
T2  - Journal of Electrochemical Science and Engineering
T1  - Cerium oxide as conversion coating for the corrosion protection of aluminum
EP  - 156
IS  - 4
SP  - 151
VL  - 3
DO  - 10.5599/jese.2013.0037
ER  - 

@article{
author = "Gulicovski, Jelena and Bajat, Jelena and Mišković-Stanković, Vesna and Jokić, Bojan and Panić, Vladimir and Milonjić, Slobodan K.",
year = "2013",
abstract = "CeO2 coatings were formed on the aluminum after Al surface preparation, by dripping the ceria sol, pre­viously prepared by forced hydrolysis of Ce(NO3)4. The anticorrosive properties of ceria coatings were investigated by the electrochemical impedance spectroscopy (EIS) during the exposure to 0.03% NaCl. The morphology of the coa­tings was examined by the scanning electron microscopy (SEM). EIS data indicated considerably larger corrosion resistance of CeO2-coated aluminum than for bare Al. The corrosion processes on Al below CeO2 coating are sub­jected to more pronounced diffusion limitations in com­parison to the processes below passive aluminum oxide film, as the consequence of the formation of highly com­pact protective coating. The results show that the deposi­tion of ceria coatings is an effective way to improve corro­sion resistance for aluminum.",
publisher = "International Association of Physical Chemists (IAPC)",
journal = "Journal of Electrochemical Science and Engineering",
title = "Cerium oxide as conversion coating for the corrosion protection of aluminum",
pages = "156-151",
number = "4",
volume = "3",
doi = "10.5599/jese.2013.0037"
}

Gulicovski, J., Bajat, J., Mišković-Stanković, V., Jokić, B., Panić, V.,& Milonjić, S. K.. (2013). Cerium oxide as conversion coating for the corrosion protection of aluminum. in Journal of Electrochemical Science and Engineering
International Association of Physical Chemists (IAPC)., 3(4), 151-156.
https://doi.org/10.5599/jese.2013.0037

Gulicovski J, Bajat J, Mišković-Stanković V, Jokić B, Panić V, Milonjić SK. Cerium oxide as conversion coating for the corrosion protection of aluminum. in Journal of Electrochemical Science and Engineering. 2013;3(4):151-156.
doi:10.5599/jese.2013.0037 .

Gulicovski, Jelena, Bajat, Jelena, Mišković-Stanković, Vesna, Jokić, Bojan, Panić, Vladimir, Milonjić, Slobodan K., "Cerium oxide as conversion coating for the corrosion protection of aluminum" in Journal of Electrochemical Science and Engineering, 3, no. 4 (2013):151-156,
https://doi.org/10.5599/jese.2013.0037 . .

TY  - JOUR
AU  - Gulicovski, Jelena
AU  - Bajat, Jelena
AU  - Mišković-Stanković, Vesna
AU  - Jokić, Bojan
AU  - Panić, Vladimir
AU  - Milonjić, Slobodan K.
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2163
AB  - CeO2 coatings were formed on the aluminum after Al surface preparation, by dripping the ceria sol, previously prepared by forced hydrolysis of Ce(NO3)(4). The anticorrosive properties of ceria coatings were investigated by the electrochemical impedance spectroscopy (EIS) during the exposure to 0.03% NaCl. The morphology of the coatings was examined by the scanning electron microscopy (SEM). EIS data indicated considerably larger corrosion resistance of CeO2-coated aluminum than for bare Al. The corrosion processes on Al below CeO2 coating are subjected to more pronounced diffusion limitations in comparison to the processes below passive aluminum oxide film, as the consequence of the formation of highly compact protective coating. The results show that the deposition of ceria coatings is an effective way to improve corrosion resistance for aluminum.
PB  - Modtech Publishing House, Iasi
T2  - Modtech 2012: New Face of T M C R, Vols I and II
T1  - Cerium oxide as conversion coating for the corrosion protection of aluminum
EP  - 432
SP  - 429
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7011
ER  - 

@article{
author = "Gulicovski, Jelena and Bajat, Jelena and Mišković-Stanković, Vesna and Jokić, Bojan and Panić, Vladimir and Milonjić, Slobodan K.",
year = "2012",
abstract = "CeO2 coatings were formed on the aluminum after Al surface preparation, by dripping the ceria sol, previously prepared by forced hydrolysis of Ce(NO3)(4). The anticorrosive properties of ceria coatings were investigated by the electrochemical impedance spectroscopy (EIS) during the exposure to 0.03% NaCl. The morphology of the coatings was examined by the scanning electron microscopy (SEM). EIS data indicated considerably larger corrosion resistance of CeO2-coated aluminum than for bare Al. The corrosion processes on Al below CeO2 coating are subjected to more pronounced diffusion limitations in comparison to the processes below passive aluminum oxide film, as the consequence of the formation of highly compact protective coating. The results show that the deposition of ceria coatings is an effective way to improve corrosion resistance for aluminum.",
publisher = "Modtech Publishing House, Iasi",
journal = "Modtech 2012: New Face of T M C R, Vols I and II",
title = "Cerium oxide as conversion coating for the corrosion protection of aluminum",
pages = "432-429",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7011"
}

Gulicovski, J., Bajat, J., Mišković-Stanković, V., Jokić, B., Panić, V.,& Milonjić, S. K.. (2012). Cerium oxide as conversion coating for the corrosion protection of aluminum. in Modtech 2012: New Face of T M C R, Vols I and II
Modtech Publishing House, Iasi., 429-432.
https://hdl.handle.net/21.15107/rcub_vinar_7011

Gulicovski J, Bajat J, Mišković-Stanković V, Jokić B, Panić V, Milonjić SK. Cerium oxide as conversion coating for the corrosion protection of aluminum. in Modtech 2012: New Face of T M C R, Vols I and II. 2012;:429-432.
https://hdl.handle.net/21.15107/rcub_vinar_7011 .

Gulicovski, Jelena, Bajat, Jelena, Mišković-Stanković, Vesna, Jokić, Bojan, Panić, Vladimir, Milonjić, Slobodan K., "Cerium oxide as conversion coating for the corrosion protection of aluminum" in Modtech 2012: New Face of T M C R, Vols I and II (2012):429-432,
https://hdl.handle.net/21.15107/rcub_vinar_7011 .

TY  - JOUR
AU  - Babić, Biljana M.
AU  - Gulicovski, Jelena
AU  - Gajić Krstajić, Ljiljana
AU  - Elezović, Nevenka
AU  - Radmilović, Velimir R.
AU  - Krstajić, Nedeljko
AU  - Vračar, Ljiljana
PY  - 2009
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5531
AB  - The kinetics and mechanism of the hydrogen oxidation reaction were studied in 0.5 mol dm-3 HClO4 solution on an electrode based on titanium oxide with Magneli phase structure-supported platinum electrocatalyst applied on rotation Au disk electrode. Pt catalyst was prepared by impregnation method from 2-propanol solution of Pt(NH3)2(NO2)2 and sub-stoichiometric titanium oxide powder. Sub-stiochiometric titanium oxide support was characterized by X-ray diffraction and BET techniques. The synthesized catalyst was analyzed by TEM technique. Based on Tafel-Heyrovsky-Volmer mechanism the corresponding kinetic equations were derived to describe the hydrogen oxidation current-potential behavior on RDE over the entire potential region. The polarization RDE curves were fitted with derived polarization equations according to proposed model. The fitting shows that the HOR on Pt proceeds most likely via the Tafel-Volmer (TV) pathway in the lower potential region, while the Heyrovsky-Volmer (HV) pathway is operative in the higher potential region. It is pointed out that Tafel equation that has been frequently used for the kinetics analysis in the HOR, can not reproduce the polarization curves measured with high mass-transport rates. Polarization measurements on RDE revealed that the Pt catalyst deposited on titanium suboxide support showed equal specific activity for the HOR compared to conventional carbon-supported Pt fuel cell catalyst. © 2008 Elsevier B.V. All rights reserved.
PB  - Elsevier
T2  - Journal of Power Sources
T1  - Kinetic study of the hydrogen oxidation reaction on sub-stoichiometric titanium oxide-supported platinum electrocatalyst in acid solution
EP  - 106
IS  - 1
SP  - 99
VL  - 193
DO  - 10.1016/j.jpowsour.2008.11.142
UR  - https://hdl.handle.net/21.15107/rcub_dais_3480
ER  - 

@article{
author = "Babić, Biljana M. and Gulicovski, Jelena and Gajić Krstajić, Ljiljana and Elezović, Nevenka and Radmilović, Velimir R. and Krstajić, Nedeljko and Vračar, Ljiljana",
year = "2009",
abstract = "The kinetics and mechanism of the hydrogen oxidation reaction were studied in 0.5 mol dm-3 HClO4 solution on an electrode based on titanium oxide with Magneli phase structure-supported platinum electrocatalyst applied on rotation Au disk electrode. Pt catalyst was prepared by impregnation method from 2-propanol solution of Pt(NH3)2(NO2)2 and sub-stoichiometric titanium oxide powder. Sub-stiochiometric titanium oxide support was characterized by X-ray diffraction and BET techniques. The synthesized catalyst was analyzed by TEM technique. Based on Tafel-Heyrovsky-Volmer mechanism the corresponding kinetic equations were derived to describe the hydrogen oxidation current-potential behavior on RDE over the entire potential region. The polarization RDE curves were fitted with derived polarization equations according to proposed model. The fitting shows that the HOR on Pt proceeds most likely via the Tafel-Volmer (TV) pathway in the lower potential region, while the Heyrovsky-Volmer (HV) pathway is operative in the higher potential region. It is pointed out that Tafel equation that has been frequently used for the kinetics analysis in the HOR, can not reproduce the polarization curves measured with high mass-transport rates. Polarization measurements on RDE revealed that the Pt catalyst deposited on titanium suboxide support showed equal specific activity for the HOR compared to conventional carbon-supported Pt fuel cell catalyst. © 2008 Elsevier B.V. All rights reserved.",
publisher = "Elsevier",
journal = "Journal of Power Sources",
title = "Kinetic study of the hydrogen oxidation reaction on sub-stoichiometric titanium oxide-supported platinum electrocatalyst in acid solution",
pages = "106-99",
number = "1",
volume = "193",
doi = "10.1016/j.jpowsour.2008.11.142",
url = "https://hdl.handle.net/21.15107/rcub_dais_3480"
}

Babić, B. M., Gulicovski, J., Gajić Krstajić, L., Elezović, N., Radmilović, V. R., Krstajić, N.,& Vračar, L.. (2009). Kinetic study of the hydrogen oxidation reaction on sub-stoichiometric titanium oxide-supported platinum electrocatalyst in acid solution. in Journal of Power Sources
Elsevier., 193(1), 99-106.
https://doi.org/10.1016/j.jpowsour.2008.11.142
https://hdl.handle.net/21.15107/rcub_dais_3480

Babić BM, Gulicovski J, Gajić Krstajić L, Elezović N, Radmilović VR, Krstajić N, Vračar L. Kinetic study of the hydrogen oxidation reaction on sub-stoichiometric titanium oxide-supported platinum electrocatalyst in acid solution. in Journal of Power Sources. 2009;193(1):99-106.
doi:10.1016/j.jpowsour.2008.11.142
https://hdl.handle.net/21.15107/rcub_dais_3480 .

Babić, Biljana M., Gulicovski, Jelena, Gajić Krstajić, Ljiljana, Elezović, Nevenka, Radmilović, Velimir R., Krstajić, Nedeljko, Vračar, Ljiljana, "Kinetic study of the hydrogen oxidation reaction on sub-stoichiometric titanium oxide-supported platinum electrocatalyst in acid solution" in Journal of Power Sources, 193, no. 1 (2009):99-106,
https://doi.org/10.1016/j.jpowsour.2008.11.142 .,
https://hdl.handle.net/21.15107/rcub_dais_3480 .

TY  - JOUR
AU  - Gulicovski, Jelena
AU  - Čerović, Ljiljana S.
AU  - Milonjić, Slobodan K.
AU  - Popović, Ivanka
PY  - 2008
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1324
AB  - Itaconic acid, IA (C5H6O4), was investigated as a potential flocculant for the aqueous processing of alumina powders. The adsorption of IA, as a function of its concentration and pH value of the solution, onto the alumina surface was studied by the solution depletion method. The stability of the suspensions in the presence of itaconic acid was evaluated in light of the surface charge of the alumina powder used, the degree of dissociation of IA, as well as the sedimentation behavior and rheology of the suspensions. It was found that the adsorption process is extremely pH dependent; the maximum adsorption of IA onto alumina surface occurring at a pH close to the value of the first IA dissociation constant, pKa1. Also, IA does not influence the value of the point of zero charge of alumina. It was shown that IA represents an efficient flocculant for concentrated acidic alumina suspensions.
AB  - Izučavana je primena itakonske kiseline, IK (C5H6O4), kao potencijalnog flokulanta, za vodeno procesiranje prahova aluminijum-oksida. Adsorpcija itakonske kiseline na površini aluminijum-oksida izučavana je u funkciji koncentracije i pH rastvora. Stabilnost suspenzija aluminijum-oksida u prisustvu itakonske kiseline objašnjena je uzimajući u obzir površinsko naelektrisanje aluminijum-oksida, stepen disocijacije itakonske kiseline, sedimentaciono ponašanje i reološka svojstva suspenzija. Nađeno je da adsorpcija IK jako zavisi od pH. Maksimalna adsorpcija IK na površini aluminijum-oksida dešava se pri pH vrednosti bliskoj vrednosti prve konstante disocijacije IK, pKa1. Dodatak itakonske kiseline ne utiče na vrednost tačke nultog naelektrisanja aluminijum-oksida. Pokazano je da je IK efikasan flokulant za koncentrovane, kisele suspenzije aluminijum-oksida.
PB  - Serbian Chemical Society, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Adsorption of itaconic acid from aqueous solutions onto alumina
T1  - Adsorpcija itakonske kiseline iz vodenih rastvora na aluminijum-oksidu
EP  - 834
IS  - 8-9
SP  - 825
VL  - 73
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1324
ER  - 

@article{
author = "Gulicovski, Jelena and Čerović, Ljiljana S. and Milonjić, Slobodan K. and Popović, Ivanka",
year = "2008",
abstract = "Itaconic acid, IA (C5H6O4), was investigated as a potential flocculant for the aqueous processing of alumina powders. The adsorption of IA, as a function of its concentration and pH value of the solution, onto the alumina surface was studied by the solution depletion method. The stability of the suspensions in the presence of itaconic acid was evaluated in light of the surface charge of the alumina powder used, the degree of dissociation of IA, as well as the sedimentation behavior and rheology of the suspensions. It was found that the adsorption process is extremely pH dependent; the maximum adsorption of IA onto alumina surface occurring at a pH close to the value of the first IA dissociation constant, pKa1. Also, IA does not influence the value of the point of zero charge of alumina. It was shown that IA represents an efficient flocculant for concentrated acidic alumina suspensions., Izučavana je primena itakonske kiseline, IK (C5H6O4), kao potencijalnog flokulanta, za vodeno procesiranje prahova aluminijum-oksida. Adsorpcija itakonske kiseline na površini aluminijum-oksida izučavana je u funkciji koncentracije i pH rastvora. Stabilnost suspenzija aluminijum-oksida u prisustvu itakonske kiseline objašnjena je uzimajući u obzir površinsko naelektrisanje aluminijum-oksida, stepen disocijacije itakonske kiseline, sedimentaciono ponašanje i reološka svojstva suspenzija. Nađeno je da adsorpcija IK jako zavisi od pH. Maksimalna adsorpcija IK na površini aluminijum-oksida dešava se pri pH vrednosti bliskoj vrednosti prve konstante disocijacije IK, pKa1. Dodatak itakonske kiseline ne utiče na vrednost tačke nultog naelektrisanja aluminijum-oksida. Pokazano je da je IK efikasan flokulant za koncentrovane, kisele suspenzije aluminijum-oksida.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Adsorption of itaconic acid from aqueous solutions onto alumina, Adsorpcija itakonske kiseline iz vodenih rastvora na aluminijum-oksidu",
pages = "834-825",
number = "8-9",
volume = "73",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1324"
}

Gulicovski, J., Čerović, L. S., Milonjić, S. K.,& Popović, I.. (2008). Adsorption of itaconic acid from aqueous solutions onto alumina. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 73(8-9), 825-834.
https://hdl.handle.net/21.15107/rcub_technorep_1324

Gulicovski J, Čerović LS, Milonjić SK, Popović I. Adsorption of itaconic acid from aqueous solutions onto alumina. in Journal of the Serbian Chemical Society. 2008;73(8-9):825-834.
https://hdl.handle.net/21.15107/rcub_technorep_1324 .

Gulicovski, Jelena, Čerović, Ljiljana S., Milonjić, Slobodan K., Popović, Ivanka, "Adsorption of itaconic acid from aqueous solutions onto alumina" in Journal of the Serbian Chemical Society, 73, no. 8-9 (2008):825-834,
https://hdl.handle.net/21.15107/rcub_technorep_1324 .