TY  - JOUR
AU  - Bugarčić, Mladen
AU  - Lopičić, Zorica
AU  - Šoštarić, Tatjana
AU  - Marinković, Aleksandar D.
AU  - Rusmirović, Jelena D.
AU  - Milošević, Dragana
AU  - Milivojević, Milan
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4798
AB  - Expanded vermiculite (EV) was modified by deposition of different spinel ferrite composites on the outer surface of EV 2:1 layers in order to improve its adsorptive properties. Modifications were made by deposition of: magnetite, manganese ferrite, cobalt ferrite and chromium oxide/hematite. The characterization of modified materials was performed by: scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) methodology, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), magnetization measurements, as well as determination of cation exchange capacity (CEC) and pH point of zero charge (pHPZC). Obtained samples were used as adsorbents for Pb2+, Ni2+and Cd2+ ions from an aqueous solution in a batch system. Results showed that adsorption capacity was strongly dependent on physical and chemical changes induced by specific chemical modification. Hydrothermally produced manganese and cobalt ferrites caused significant surface changes and altered the interlayer cation balance. Among the others, EV-Mn/Co-ferrite(s) samples possessed the highest adsorption capacity towards Ni2+ (33.06 mg g-1), along with an increase of the CEC. Freundlich's adsorption isotherm model provided the best fit of obtained experimental data, while kinetic studies showed that the adsorption rate follows the pseudo second-order model, implying heterogeneous adsorbents surface. Thermodynamic and kinetic parameters indicated that the mechanism of cations removal efficacy was dominantly followed by the ion exchange. This study confirmed that doped ferrites, produced by solvothermal method, improve surface properties of EV and increase adsorption potentials towards heavy metals.
PB  - Elsevier
T2  - Journal of Environmental Chemical Engineering
T1  - Vermiculite enriched by Fe(III) oxides as a novel adsorbent for toxic metals removal
VL  - 9
IS  - 5
SP  - 106020
DO  - 10.1016/j.jece.2021.106020
ER  - 

@article{
author = "Bugarčić, Mladen and Lopičić, Zorica and Šoštarić, Tatjana and Marinković, Aleksandar D. and Rusmirović, Jelena D. and Milošević, Dragana and Milivojević, Milan",
year = "2021",
abstract = "Expanded vermiculite (EV) was modified by deposition of different spinel ferrite composites on the outer surface of EV 2:1 layers in order to improve its adsorptive properties. Modifications were made by deposition of: magnetite, manganese ferrite, cobalt ferrite and chromium oxide/hematite. The characterization of modified materials was performed by: scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) methodology, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), magnetization measurements, as well as determination of cation exchange capacity (CEC) and pH point of zero charge (pHPZC). Obtained samples were used as adsorbents for Pb2+, Ni2+and Cd2+ ions from an aqueous solution in a batch system. Results showed that adsorption capacity was strongly dependent on physical and chemical changes induced by specific chemical modification. Hydrothermally produced manganese and cobalt ferrites caused significant surface changes and altered the interlayer cation balance. Among the others, EV-Mn/Co-ferrite(s) samples possessed the highest adsorption capacity towards Ni2+ (33.06 mg g-1), along with an increase of the CEC. Freundlich's adsorption isotherm model provided the best fit of obtained experimental data, while kinetic studies showed that the adsorption rate follows the pseudo second-order model, implying heterogeneous adsorbents surface. Thermodynamic and kinetic parameters indicated that the mechanism of cations removal efficacy was dominantly followed by the ion exchange. This study confirmed that doped ferrites, produced by solvothermal method, improve surface properties of EV and increase adsorption potentials towards heavy metals.",
publisher = "Elsevier",
journal = "Journal of Environmental Chemical Engineering",
title = "Vermiculite enriched by Fe(III) oxides as a novel adsorbent for toxic metals removal",
volume = "9",
number = "5",
pages = "106020",
doi = "10.1016/j.jece.2021.106020"
}

Bugarčić, M., Lopičić, Z., Šoštarić, T., Marinković, A. D., Rusmirović, J. D., Milošević, D.,& Milivojević, M.. (2021). Vermiculite enriched by Fe(III) oxides as a novel adsorbent for toxic metals removal. in Journal of Environmental Chemical Engineering
Elsevier., 9(5), 106020.
https://doi.org/10.1016/j.jece.2021.106020

Bugarčić M, Lopičić Z, Šoštarić T, Marinković AD, Rusmirović JD, Milošević D, Milivojević M. Vermiculite enriched by Fe(III) oxides as a novel adsorbent for toxic metals removal. in Journal of Environmental Chemical Engineering. 2021;9(5):106020.
doi:10.1016/j.jece.2021.106020 .

Bugarčić, Mladen, Lopičić, Zorica, Šoštarić, Tatjana, Marinković, Aleksandar D., Rusmirović, Jelena D., Milošević, Dragana, Milivojević, Milan, "Vermiculite enriched by Fe(III) oxides as a novel adsorbent for toxic metals removal" in Journal of Environmental Chemical Engineering, 9, no. 5 (2021):106020,
https://doi.org/10.1016/j.jece.2021.106020 . .

TY  - CONF
AU  - Bugarčić, Mladen
AU  - Milošević, Dragana
AU  - Sokić, Miroslav
AU  - Jovanović, Gvozden
AU  - Lopičić, Zorica
AU  - Marinković, Aleksandar
AU  - Milivojević, Milan
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6468
AB  - The minerals with unique properties such as mica minerals have promising approach in environmental and industrial sphere. In this study, cobalt ferrite/expanded vermiculite (CoFe2O4/EV) composite was prepared by in-situ method. Both composite and base materials are characterized by FTIR, XRD and SEM techniques, while the CEC and point of zero charge (pHPZC) was also determined. The adsorption properties of CoFe2O4/EV and EV have been investigated in a batch system, for the Ni (II) sorption from water. Adsorption experimental results were fitted by kinetic and adsorption models, and resulted in ionic exchange mechanism with maximum adsorption capacity of 23.2mg g-1 (298 K).
PB  - University of Belgrade, Technical Faculty in Bor
C3  - Book of Abstracts - XIV International Mineral Processing and Recycling Conference, 12th-14th May 2021, Belgrade, Serbia
T1  - Synthesis and characterization of cobalt ferrite/ expanded vermiculite as a sorbent of nickel ions
SP  - 154
EP  - 159
UR  - https://hdl.handle.net/21.15107/rcub_cer_6468
ER  - 

@conference{
author = "Bugarčić, Mladen and Milošević, Dragana and Sokić, Miroslav and Jovanović, Gvozden and Lopičić, Zorica and Marinković, Aleksandar and Milivojević, Milan",
year = "2021",
abstract = "The minerals with unique properties such as mica minerals have promising approach in environmental and industrial sphere. In this study, cobalt ferrite/expanded vermiculite (CoFe2O4/EV) composite was prepared by in-situ method. Both composite and base materials are characterized by FTIR, XRD and SEM techniques, while the CEC and point of zero charge (pHPZC) was also determined. The adsorption properties of CoFe2O4/EV and EV have been investigated in a batch system, for the Ni (II) sorption from water. Adsorption experimental results were fitted by kinetic and adsorption models, and resulted in ionic exchange mechanism with maximum adsorption capacity of 23.2mg g-1 (298 K).",
publisher = "University of Belgrade, Technical Faculty in Bor",
journal = "Book of Abstracts - XIV International Mineral Processing and Recycling Conference, 12th-14th May 2021, Belgrade, Serbia",
title = "Synthesis and characterization of cobalt ferrite/ expanded vermiculite as a sorbent of nickel ions",
pages = "154-159",
url = "https://hdl.handle.net/21.15107/rcub_cer_6468"
}

Bugarčić, M., Milošević, D., Sokić, M., Jovanović, G., Lopičić, Z., Marinković, A.,& Milivojević, M.. (2021). Synthesis and characterization of cobalt ferrite/ expanded vermiculite as a sorbent of nickel ions. in Book of Abstracts - XIV International Mineral Processing and Recycling Conference, 12th-14th May 2021, Belgrade, Serbia
University of Belgrade, Technical Faculty in Bor., 154-159.
https://hdl.handle.net/21.15107/rcub_cer_6468

Bugarčić M, Milošević D, Sokić M, Jovanović G, Lopičić Z, Marinković A, Milivojević M. Synthesis and characterization of cobalt ferrite/ expanded vermiculite as a sorbent of nickel ions. in Book of Abstracts - XIV International Mineral Processing and Recycling Conference, 12th-14th May 2021, Belgrade, Serbia. 2021;:154-159.
https://hdl.handle.net/21.15107/rcub_cer_6468 .

Bugarčić, Mladen, Milošević, Dragana, Sokić, Miroslav, Jovanović, Gvozden, Lopičić, Zorica, Marinković, Aleksandar, Milivojević, Milan, "Synthesis and characterization of cobalt ferrite/ expanded vermiculite as a sorbent of nickel ions" in Book of Abstracts - XIV International Mineral Processing and Recycling Conference, 12th-14th May 2021, Belgrade, Serbia (2021):154-159,
https://hdl.handle.net/21.15107/rcub_cer_6468 .

TY  - CONF
AU  - Bugarčić, Mladen
AU  - Sokić, Miroslav
AU  - Marković, Branislav
AU  - Milivojević, Milan
AU  - Marinković, Aleksandar
AU  - Perendija, Jovana
AU  - Lopičić, Zorica
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4886
AB  - Adsorbents based on magnetic materials are the subject of numerous researches. Beside good magnetism and functional surface, manganese ferrite is unstable and prone to form low mechanical strength agglomerates, which necessitate its deposition on the substrate surface. Expanded vermiculite outer surfac, is a useful medium for the deposition of nanoparticles whereas intercation layer is suitable for holding cation species (distance of 2:1 layers may be greater than 10 Å). Due to its relatively high surface area, cation exchange capacity and natural abundance of vermiculite, this mica mineral and its composites could be valorized as potentially low-cost adsorbents. In this study, manganese ferrite/expanded vermiculite (MnFe2O4/EV) composite was prepared by in-situ method. Deposited manganese ferrite particles on the surface of EV were formed in the solvothermal reaction using suitable reagents. Both composite and base material are characterized by Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRPD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) specific surface area (SSA), cation exchange capacity (CEC) and pH point of zero charge (pHPZC) determination. The adsorption properties of MnFe2O4/EV and EV have been investigated in a batch system at pH close to the pHPZC for the removal of Ni (II) from water. Considering process parameters such as contact time, adsorbent dosage and temperature: adsorption type, isotherm parameters (Langmuir and Freundlich) and rate of adsorption parameters were determined. Results of the kinetic studies gave fine correlations with pseudo – second order and Weber – Morris model. Taking into consideration fact that EV had low CEC values and SSA, obtained composite have high adsorption capacity (more than 30 mg Ni g-1). Also, X-ray diffractograms showed alteration of biotite vermiculite (formed during solvothermal action) into phlogopite (formed after adsorption process and aging). The methodology applied in this work may be utilized for the fabrication of other ferrite spinels, perovskites and other oxide systems.
AB  - Adsorbenti na bazi magnetičnih materijala su predmet brojnih istraživanja. Osim dobre magnetičnosti i funkcioncionalnoj površini, mangan ferit je nestabilan i teši formiranju aglomerata niske mehaničke čvrstine, čime se iziskuje njegova depozicija na površini supstrata. Spoljna površina ekspandovanog vermikulita je korisni medijum za depoziciju nanočestica dok interkalacioni sloj je podesan za zadržavanje katjonskih vrsta (rastojanje između slojeva može biti iznad 10 Å). Zahvaljujući relativno visokoj površini, kapacitetu katjonske izmene i prirodnoj zastupljenosti vermikulita, ovaj mineral liskuna i njegovi kompoziti mogu biti valorizovani kao potencijalni povoljni adsorbenti. U ovoj studiji, kompozit mangan ferita/eksapndovanom vermikulitu (MnFe2O4/EV) pripremljen je in-situ metodom. Deponovane čestice mangan ferita na površini EV formirane su u solvotermalnoj reakciji korišćenjem podesnih reagenasa. Kompozit kao i bazni materijal karakterizovani su: infracrvenom spektroskopijom sa Furijeovom transformacijom (FTIR), difrakcijom X-zraka na prahu (XRPD), skenirajućom elektronskom mikroskopijom (SEM), specifičnom površinom (SSA) određenom metodologijom po BET-u, kapacitetom katjonske izmene (CEC) i pH tačke nultog naelektrisanja (pHPZC). Adsorpciona svojstva MnFe2O4/EV i EV istražena su u šaržnom sistemu na pH vrednosti bliskoj pH tački nultog naelektrisanja za uklanjane Ni (II) iz vode. Uzimajući u obzir procesne parametre kao što su vreme kontakta, masa adsorbenta i temperatura određeni su: tip adsorpcije, izotermski parametri (Lengmir i Frojndlih) kao i parametri brzine adsorpcije. Rezultati kinetičkih studija dobro se korelišu pseudo – drugom redu reakcije i Veber – Morisovim modelom. Uzevši u obzir činjenicu da je uzorak EV imao malu vrednost CEC i nisku specifičnu površinu, dobijeni kompozit ima visok adsorpcioni kapacitet (preko 30 mg Ni g-1). Osim toga, difraktogrami X-zraka pokazali su alteraciju biotitskog vermikulita (formiranog solvotermalnom akcijom) u flogopit (formiran nakon adsorpcionog procesa i starenjem). Metodologija primenjena u ovom radu može biti iskorištena za proizvodnju drugih feritnih spinela, perovskita i ostalih oksidnih sistema.
PB  - Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM
C3  - Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija
T1  - Fabrication and characterization of manganese ferrite/expanded vermiculite as a magnetic adsorbent of nickel ions
SP  - 84
EP  - 94
UR  - https://hdl.handle.net/21.15107/rcub_cer_4886
ER  - 

@conference{
author = "Bugarčić, Mladen and Sokić, Miroslav and Marković, Branislav and Milivojević, Milan and Marinković, Aleksandar and Perendija, Jovana and Lopičić, Zorica",
year = "2021",
abstract = "Adsorbents based on magnetic materials are the subject of numerous researches. Beside good magnetism and functional surface, manganese ferrite is unstable and prone to form low mechanical strength agglomerates, which necessitate its deposition on the substrate surface. Expanded vermiculite outer surfac, is a useful medium for the deposition of nanoparticles whereas intercation layer is suitable for holding cation species (distance of 2:1 layers may be greater than 10 Å). Due to its relatively high surface area, cation exchange capacity and natural abundance of vermiculite, this mica mineral and its composites could be valorized as potentially low-cost adsorbents. In this study, manganese ferrite/expanded vermiculite (MnFe2O4/EV) composite was prepared by in-situ method. Deposited manganese ferrite particles on the surface of EV were formed in the solvothermal reaction using suitable reagents. Both composite and base material are characterized by Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRPD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) specific surface area (SSA), cation exchange capacity (CEC) and pH point of zero charge (pHPZC) determination. The adsorption properties of MnFe2O4/EV and EV have been investigated in a batch system at pH close to the pHPZC for the removal of Ni (II) from water. Considering process parameters such as contact time, adsorbent dosage and temperature: adsorption type, isotherm parameters (Langmuir and Freundlich) and rate of adsorption parameters were determined. Results of the kinetic studies gave fine correlations with pseudo – second order and Weber – Morris model. Taking into consideration fact that EV had low CEC values and SSA, obtained composite have high adsorption capacity (more than 30 mg Ni g-1). Also, X-ray diffractograms showed alteration of biotite vermiculite (formed during solvothermal action) into phlogopite (formed after adsorption process and aging). The methodology applied in this work may be utilized for the fabrication of other ferrite spinels, perovskites and other oxide systems., Adsorbenti na bazi magnetičnih materijala su predmet brojnih istraživanja. Osim dobre magnetičnosti i funkcioncionalnoj površini, mangan ferit je nestabilan i teši formiranju aglomerata niske mehaničke čvrstine, čime se iziskuje njegova depozicija na površini supstrata. Spoljna površina ekspandovanog vermikulita je korisni medijum za depoziciju nanočestica dok interkalacioni sloj je podesan za zadržavanje katjonskih vrsta (rastojanje između slojeva može biti iznad 10 Å). Zahvaljujući relativno visokoj površini, kapacitetu katjonske izmene i prirodnoj zastupljenosti vermikulita, ovaj mineral liskuna i njegovi kompoziti mogu biti valorizovani kao potencijalni povoljni adsorbenti. U ovoj studiji, kompozit mangan ferita/eksapndovanom vermikulitu (MnFe2O4/EV) pripremljen je in-situ metodom. Deponovane čestice mangan ferita na površini EV formirane su u solvotermalnoj reakciji korišćenjem podesnih reagenasa. Kompozit kao i bazni materijal karakterizovani su: infracrvenom spektroskopijom sa Furijeovom transformacijom (FTIR), difrakcijom X-zraka na prahu (XRPD), skenirajućom elektronskom mikroskopijom (SEM), specifičnom površinom (SSA) određenom metodologijom po BET-u, kapacitetom katjonske izmene (CEC) i pH tačke nultog naelektrisanja (pHPZC). Adsorpciona svojstva MnFe2O4/EV i EV istražena su u šaržnom sistemu na pH vrednosti bliskoj pH tački nultog naelektrisanja za uklanjane Ni (II) iz vode. Uzimajući u obzir procesne parametre kao što su vreme kontakta, masa adsorbenta i temperatura određeni su: tip adsorpcije, izotermski parametri (Lengmir i Frojndlih) kao i parametri brzine adsorpcije. Rezultati kinetičkih studija dobro se korelišu pseudo – drugom redu reakcije i Veber – Morisovim modelom. Uzevši u obzir činjenicu da je uzorak EV imao malu vrednost CEC i nisku specifičnu površinu, dobijeni kompozit ima visok adsorpcioni kapacitet (preko 30 mg Ni g-1). Osim toga, difraktogrami X-zraka pokazali su alteraciju biotitskog vermikulita (formiranog solvotermalnom akcijom) u flogopit (formiran nakon adsorpcionog procesa i starenjem). Metodologija primenjena u ovom radu može biti iskorištena za proizvodnju drugih feritnih spinela, perovskita i ostalih oksidnih sistema.",
publisher = "Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM",
journal = "Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija",
title = "Fabrication and characterization of manganese ferrite/expanded vermiculite as a magnetic adsorbent of nickel ions",
pages = "84-94",
url = "https://hdl.handle.net/21.15107/rcub_cer_4886"
}

Bugarčić, M., Sokić, M., Marković, B., Milivojević, M., Marinković, A., Perendija, J.,& Lopičić, Z.. (2021). Fabrication and characterization of manganese ferrite/expanded vermiculite as a magnetic adsorbent of nickel ions. in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija
Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM., 84-94.
https://hdl.handle.net/21.15107/rcub_cer_4886

Bugarčić M, Sokić M, Marković B, Milivojević M, Marinković A, Perendija J, Lopičić Z. Fabrication and characterization of manganese ferrite/expanded vermiculite as a magnetic adsorbent of nickel ions. in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija. 2021;:84-94.
https://hdl.handle.net/21.15107/rcub_cer_4886 .

Bugarčić, Mladen, Sokić, Miroslav, Marković, Branislav, Milivojević, Milan, Marinković, Aleksandar, Perendija, Jovana, Lopičić, Zorica, "Fabrication and characterization of manganese ferrite/expanded vermiculite as a magnetic adsorbent of nickel ions" in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija (2021):84-94,
https://hdl.handle.net/21.15107/rcub_cer_4886 .

TY  - JOUR
AU  - Jonović, Marko
AU  - Žuža, Milena
AU  - Đorđević, Verica
AU  - Šekuljica, Nataša
AU  - Milivojević, Milan
AU  - Jugović, Branimir
AU  - Bugarski, Branko
AU  - Knežević-Jugović, Zorica
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4834
AB  - Enzymatic hydrolysis of food proteins is convenient method to improve their functional properties and physiological activity. Herein, the successful covalent attachment of alcalase on alginate micron and submicron beads using the carbodiimide based chemistry reaction and the subsequent application of the beads for egg white and soy proteins hydrolysis were studied. In addition to the electrostatic extrusion technique (EE) previously used by others, the potential utilization of a novel ultrasonic spray atomization technique without drying (UA) and with drying (UAD) for alginate submicron beads production has been attempted. The immobilization parameters were optimized on microbeads obtained by EE technique (803 +/- 23 mu m) with respect to enzyme loading and alcalase activity. UA and UAD techniques resulted in much smaller particles (607 +/- 103 nm and 394 +/- 51 nm in diameter, respectively), enabling even higher enzyme loading of 671.6 +/- 4 mg g(-1) on the carrier and the highest immobilized alcalase activity of 2716.1 IU g(-1) in the standard reaction. The UAD biocatalyst exhibited also better performances in the real food system based on egg white or soy proteins. It has been shown that the immobilized alcalase can be reused in seven successive soy protein hydrolysis cycles with a little decrease in the activity.
PB  - MDPI
T2  - Catalysts
T1  - Immobilized Alcalase on Micron- and Submicron-Sized Alginate Beads as a Potential Biocatalyst for Hydrolysis of Food Proteins
VL  - 11
IS  - 3
SP  - 305
DO  - 10.3390/catal11030305
ER  - 

@article{
author = "Jonović, Marko and Žuža, Milena and Đorđević, Verica and Šekuljica, Nataša and Milivojević, Milan and Jugović, Branimir and Bugarski, Branko and Knežević-Jugović, Zorica",
year = "2021",
abstract = "Enzymatic hydrolysis of food proteins is convenient method to improve their functional properties and physiological activity. Herein, the successful covalent attachment of alcalase on alginate micron and submicron beads using the carbodiimide based chemistry reaction and the subsequent application of the beads for egg white and soy proteins hydrolysis were studied. In addition to the electrostatic extrusion technique (EE) previously used by others, the potential utilization of a novel ultrasonic spray atomization technique without drying (UA) and with drying (UAD) for alginate submicron beads production has been attempted. The immobilization parameters were optimized on microbeads obtained by EE technique (803 +/- 23 mu m) with respect to enzyme loading and alcalase activity. UA and UAD techniques resulted in much smaller particles (607 +/- 103 nm and 394 +/- 51 nm in diameter, respectively), enabling even higher enzyme loading of 671.6 +/- 4 mg g(-1) on the carrier and the highest immobilized alcalase activity of 2716.1 IU g(-1) in the standard reaction. The UAD biocatalyst exhibited also better performances in the real food system based on egg white or soy proteins. It has been shown that the immobilized alcalase can be reused in seven successive soy protein hydrolysis cycles with a little decrease in the activity.",
publisher = "MDPI",
journal = "Catalysts",
title = "Immobilized Alcalase on Micron- and Submicron-Sized Alginate Beads as a Potential Biocatalyst for Hydrolysis of Food Proteins",
volume = "11",
number = "3",
pages = "305",
doi = "10.3390/catal11030305"
}

Jonović, M., Žuža, M., Đorđević, V., Šekuljica, N., Milivojević, M., Jugović, B., Bugarski, B.,& Knežević-Jugović, Z.. (2021). Immobilized Alcalase on Micron- and Submicron-Sized Alginate Beads as a Potential Biocatalyst for Hydrolysis of Food Proteins. in Catalysts
MDPI., 11(3), 305.
https://doi.org/10.3390/catal11030305

Jonović M, Žuža M, Đorđević V, Šekuljica N, Milivojević M, Jugović B, Bugarski B, Knežević-Jugović Z. Immobilized Alcalase on Micron- and Submicron-Sized Alginate Beads as a Potential Biocatalyst for Hydrolysis of Food Proteins. in Catalysts. 2021;11(3):305.
doi:10.3390/catal11030305 .

Jonović, Marko, Žuža, Milena, Đorđević, Verica, Šekuljica, Nataša, Milivojević, Milan, Jugović, Branimir, Bugarski, Branko, Knežević-Jugović, Zorica, "Immobilized Alcalase on Micron- and Submicron-Sized Alginate Beads as a Potential Biocatalyst for Hydrolysis of Food Proteins" in Catalysts, 11, no. 3 (2021):305,
https://doi.org/10.3390/catal11030305 . .

TY  - CONF
AU  - Bugarčić, Mladen
AU  - Milošević, Dragana
AU  - Spasojević, Milica
AU  - Marunkić, Dunja
AU  - Kovačina, Jovanka
AU  - Milivojević, Milan
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7064
AB  - Point of zero charge (PZC) is one the most valuable parameter of adsorbent  preparation process, in wastewater management. Although, this parameter may be  determined measuring the electrokinetic potential (zetta potential) as the function of pH;  material engineers oftenrely on pH PZC value which may be easily determined and can give  usefuladsorbent properties duringexploitation. Samples from previous study are  characterized and their pH PZC values are determined. Provided results are such intriguing  since they brought conclusions that those values can be explained by process parameters  of the particular sample preparation. Sample marked as Cr2O3/Fe3O4/EVer have lowest pH  PZC value (4.75) and sample marked as MnFe2O4/EVer highest pH PZC value (7.47).  Another study in this paper showed that pH PZC value could be easily increased or  decreased by simple base or acid treatment, respectfully. As expected, samples treated  with bases or prepared in alkali medium have greater adsorption capacity towards cation  species, up to 20 % more than base material in the case MnFe2O4/EVer.
PB  - Beograd : Institut za istraživanja i projektovanja u privredi
C3  - Abstract Proceedings - YOUng ResearcherS Conference 2020, 28th September 2020, Belgrade
T1  - Adjsuting pH PZC value during and after adsorbent preparation
SP  - 28
EP  - 28
UR  - https://hdl.handle.net/21.15107/rcub_cer_7064
ER  - 

@conference{
author = "Bugarčić, Mladen and Milošević, Dragana and Spasojević, Milica and Marunkić, Dunja and Kovačina, Jovanka and Milivojević, Milan",
year = "2020",
abstract = "Point of zero charge (PZC) is one the most valuable parameter of adsorbent  preparation process, in wastewater management. Although, this parameter may be  determined measuring the electrokinetic potential (zetta potential) as the function of pH;  material engineers oftenrely on pH PZC value which may be easily determined and can give  usefuladsorbent properties duringexploitation. Samples from previous study are  characterized and their pH PZC values are determined. Provided results are such intriguing  since they brought conclusions that those values can be explained by process parameters  of the particular sample preparation. Sample marked as Cr2O3/Fe3O4/EVer have lowest pH  PZC value (4.75) and sample marked as MnFe2O4/EVer highest pH PZC value (7.47).  Another study in this paper showed that pH PZC value could be easily increased or  decreased by simple base or acid treatment, respectfully. As expected, samples treated  with bases or prepared in alkali medium have greater adsorption capacity towards cation  species, up to 20 % more than base material in the case MnFe2O4/EVer.",
publisher = "Beograd : Institut za istraživanja i projektovanja u privredi",
journal = "Abstract Proceedings - YOUng ResearcherS Conference 2020, 28th September 2020, Belgrade",
title = "Adjsuting pH PZC value during and after adsorbent preparation",
pages = "28-28",
url = "https://hdl.handle.net/21.15107/rcub_cer_7064"
}

Bugarčić, M., Milošević, D., Spasojević, M., Marunkić, D., Kovačina, J.,& Milivojević, M.. (2020). Adjsuting pH PZC value during and after adsorbent preparation. in Abstract Proceedings - YOUng ResearcherS Conference 2020, 28th September 2020, Belgrade
Beograd : Institut za istraživanja i projektovanja u privredi., 28-28.
https://hdl.handle.net/21.15107/rcub_cer_7064

Bugarčić M, Milošević D, Spasojević M, Marunkić D, Kovačina J, Milivojević M. Adjsuting pH PZC value during and after adsorbent preparation. in Abstract Proceedings - YOUng ResearcherS Conference 2020, 28th September 2020, Belgrade. 2020;:28-28.
https://hdl.handle.net/21.15107/rcub_cer_7064 .

Bugarčić, Mladen, Milošević, Dragana, Spasojević, Milica, Marunkić, Dunja, Kovačina, Jovanka, Milivojević, Milan, "Adjsuting pH PZC value during and after adsorbent preparation" in Abstract Proceedings - YOUng ResearcherS Conference 2020, 28th September 2020, Belgrade (2020):28-28,
https://hdl.handle.net/21.15107/rcub_cer_7064 .

TY  - CONF
AU  - Bugarčić, Mladen
AU  - Milošević, Dragana
AU  - Spasojević, Milica
AU  - Marunkić, Dunja
AU  - Kovačina, Jovanka
AU  - Milivojević, Milan
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7063
AB  - Point of zero charge (PZC) is one the most valuable parameter of adsorbent preparation process, in
wastewater management. Although, this parameter may be determined measuring the electrokinetic potential (zetta
potential) as the function of pH; material engineers oftenrely on pH PZC value which may be easily determined and
can give usefuladsorbent properties duringexploitation. Samples from previous study are characterized and their pH
PZC values are determined. Provided results are such intriguing since they brought conclusions that those values can
be explained by process parameters of the particular sample preparation. Sample marked as Cr2O3/Fe3O4/EVer have
lowest pH PZC value (4.75) and sample marked as MnFe2O4/EVer highest pH PZC value (7.47). Another study in this
paper showed that pH PZC value could be easily increased or decreased by simple base or acid treatment, respectfully.
As expected, samples treated with bases or prepared in alkali medium have greater adsorption capacity towards
cation species, up to 20 % more than base material in the case MnFe2O4/EVer.
PB  - Beograd : Institut za istraživanja i projektovanja u privredi
C3  - Proceedings - YOUng ResearcherS Conference 2020, 28th September 2020, Belgrade
T1  - Adjsuting pH PZC value during and after adsorbent preparation
SP  - 46
EP  - 51
UR  - https://hdl.handle.net/21.15107/rcub_cer_7063
ER  - 

@conference{
author = "Bugarčić, Mladen and Milošević, Dragana and Spasojević, Milica and Marunkić, Dunja and Kovačina, Jovanka and Milivojević, Milan",
year = "2020",
abstract = "Point of zero charge (PZC) is one the most valuable parameter of adsorbent preparation process, in
wastewater management. Although, this parameter may be determined measuring the electrokinetic potential (zetta
potential) as the function of pH; material engineers oftenrely on pH PZC value which may be easily determined and
can give usefuladsorbent properties duringexploitation. Samples from previous study are characterized and their pH
PZC values are determined. Provided results are such intriguing since they brought conclusions that those values can
be explained by process parameters of the particular sample preparation. Sample marked as Cr2O3/Fe3O4/EVer have
lowest pH PZC value (4.75) and sample marked as MnFe2O4/EVer highest pH PZC value (7.47). Another study in this
paper showed that pH PZC value could be easily increased or decreased by simple base or acid treatment, respectfully.
As expected, samples treated with bases or prepared in alkali medium have greater adsorption capacity towards
cation species, up to 20 % more than base material in the case MnFe2O4/EVer.",
publisher = "Beograd : Institut za istraživanja i projektovanja u privredi",
journal = "Proceedings - YOUng ResearcherS Conference 2020, 28th September 2020, Belgrade",
title = "Adjsuting pH PZC value during and after adsorbent preparation",
pages = "46-51",
url = "https://hdl.handle.net/21.15107/rcub_cer_7063"
}

Bugarčić, M., Milošević, D., Spasojević, M., Marunkić, D., Kovačina, J.,& Milivojević, M.. (2020). Adjsuting pH PZC value during and after adsorbent preparation. in Proceedings - YOUng ResearcherS Conference 2020, 28th September 2020, Belgrade
Beograd : Institut za istraživanja i projektovanja u privredi., 46-51.
https://hdl.handle.net/21.15107/rcub_cer_7063

Bugarčić M, Milošević D, Spasojević M, Marunkić D, Kovačina J, Milivojević M. Adjsuting pH PZC value during and after adsorbent preparation. in Proceedings - YOUng ResearcherS Conference 2020, 28th September 2020, Belgrade. 2020;:46-51.
https://hdl.handle.net/21.15107/rcub_cer_7063 .

Bugarčić, Mladen, Milošević, Dragana, Spasojević, Milica, Marunkić, Dunja, Kovačina, Jovanka, Milivojević, Milan, "Adjsuting pH PZC value during and after adsorbent preparation" in Proceedings - YOUng ResearcherS Conference 2020, 28th September 2020, Belgrade (2020):46-51,
https://hdl.handle.net/21.15107/rcub_cer_7063 .