TY  - JOUR
AU  - Vuruna, Mladen
AU  - Bucko, Mihael
AU  - Radović, Ljubica
AU  - Bajat, Jelena
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3088
AB  - Pure manganese coatings were prepared on the steel (AISI 4340) electrode by a non-conventional electrodeposition method, in the presence of 8 mol dm(-3) of urea as a plating additive. The influence of urea on the electrodeposition of Mn was investigated by cyclic voltammetry. The morphology of the coatings was studied by scanning electron microscopy (SEM), and their elemental composition by energy dispersive X-ray spectrometry (EDS). The results showed that the presence of urea in the solution increased the current efficiency for metal reduction for around 20%, and depending on the applied deposition potential, urea may act either as a complexing agent or through the adsorption mechanism. Moreover, urea improves the characteristics of Mn deposits, i.e. their adhesiveness, porosity, compactness, and appearance. Except for oxygen, as part of the Mn corrosion product at the coating surface, no carbon or nitrogen incorporation was detected in the deposits by EDS.
PB  - Soc Chemists Technologists Madeconia, Skopje
T2  - Macedonian Journal of Chemistry and Chemical Engineering
T1  - Manganese electrodeposition from urea-rich electrolyte
EP  - 285
IS  - 2
SP  - 277
VL  - 34
DO  - 10.20450/mjcce.2015.588
ER  - 

@article{
author = "Vuruna, Mladen and Bucko, Mihael and Radović, Ljubica and Bajat, Jelena",
year = "2015",
abstract = "Pure manganese coatings were prepared on the steel (AISI 4340) electrode by a non-conventional electrodeposition method, in the presence of 8 mol dm(-3) of urea as a plating additive. The influence of urea on the electrodeposition of Mn was investigated by cyclic voltammetry. The morphology of the coatings was studied by scanning electron microscopy (SEM), and their elemental composition by energy dispersive X-ray spectrometry (EDS). The results showed that the presence of urea in the solution increased the current efficiency for metal reduction for around 20%, and depending on the applied deposition potential, urea may act either as a complexing agent or through the adsorption mechanism. Moreover, urea improves the characteristics of Mn deposits, i.e. their adhesiveness, porosity, compactness, and appearance. Except for oxygen, as part of the Mn corrosion product at the coating surface, no carbon or nitrogen incorporation was detected in the deposits by EDS.",
publisher = "Soc Chemists Technologists Madeconia, Skopje",
journal = "Macedonian Journal of Chemistry and Chemical Engineering",
title = "Manganese electrodeposition from urea-rich electrolyte",
pages = "285-277",
number = "2",
volume = "34",
doi = "10.20450/mjcce.2015.588"
}

Vuruna, M., Bucko, M., Radović, L.,& Bajat, J.. (2015). Manganese electrodeposition from urea-rich electrolyte. in Macedonian Journal of Chemistry and Chemical Engineering
Soc Chemists Technologists Madeconia, Skopje., 34(2), 277-285.
https://doi.org/10.20450/mjcce.2015.588

Vuruna M, Bucko M, Radović L, Bajat J. Manganese electrodeposition from urea-rich electrolyte. in Macedonian Journal of Chemistry and Chemical Engineering. 2015;34(2):277-285.
doi:10.20450/mjcce.2015.588 .

Vuruna, Mladen, Bucko, Mihael, Radović, Ljubica, Bajat, Jelena, "Manganese electrodeposition from urea-rich electrolyte" in Macedonian Journal of Chemistry and Chemical Engineering, 34, no. 2 (2015):277-285,
https://doi.org/10.20450/mjcce.2015.588 . .

TY  - JOUR
AU  - Bajić, Zoran J.
AU  - Đokić, Veljko
AU  - Veličković, Zlate
AU  - Vuruna, Mladen
AU  - Ristić, Mirjana
AU  - Ben Issa, Nurredin
AU  - Marinković, Aleksandar
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2429
AB  - Unmodified farming carp (cyprinus carpio) scales were used as a biosorbent for the removal of Cd(II), Pb(II) and As(V) ions from aqueous solutions. The adsorption studies were conducted as a function of pH, contact time and temperature. The best sorption of cadmium, lead and arsenate ions was achieved for pH between 6.0 and 8.0. The adsorption data for cadmium, lead and arsenate at 20, 30 and 40 degrees C are fitted to Langmuir, Freundlich, Sips, Dubinin-Radushkevich (D-R), Jovanovic, Jovanovic-Freundlich (J-F), Temkin, Toth and Koble-Corrigan (K-C) isotherm models. Experimental data were used to model adsorption kinetics using pseudo-first order, pseudo-second order, Elovich and intraparticle diffusion kinetic models. The results showed that the adsorption of Cd(II), Pb(II) and As(V) ions onto carp scale followed the pseudo-second-order kinetic model. Thermodynamic parameters, including the Gibbs free energy (Delta G(0)), enthalpy (Delta H-0), and entropy (Delta S-0) changes, indicated that the present adsorption process was feasible, spontaneous and endothermic in the temperature range of 20-40 degrees C.
PB  - Inst Materials Physics, Bucharest
T2  - Digest Journal of Nanomaterials and Biostructures
T1  - Equilibrium, kinetic and thermodynamic studies on removal of Cd(II), Pb(II) and As(V) from wastewater using carp (cyprinus carpio) scales
EP  - 1590
IS  - 4
SP  - 1581
VL  - 8
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2429
ER  - 

@article{
author = "Bajić, Zoran J. and Đokić, Veljko and Veličković, Zlate and Vuruna, Mladen and Ristić, Mirjana and Ben Issa, Nurredin and Marinković, Aleksandar",
year = "2013",
abstract = "Unmodified farming carp (cyprinus carpio) scales were used as a biosorbent for the removal of Cd(II), Pb(II) and As(V) ions from aqueous solutions. The adsorption studies were conducted as a function of pH, contact time and temperature. The best sorption of cadmium, lead and arsenate ions was achieved for pH between 6.0 and 8.0. The adsorption data for cadmium, lead and arsenate at 20, 30 and 40 degrees C are fitted to Langmuir, Freundlich, Sips, Dubinin-Radushkevich (D-R), Jovanovic, Jovanovic-Freundlich (J-F), Temkin, Toth and Koble-Corrigan (K-C) isotherm models. Experimental data were used to model adsorption kinetics using pseudo-first order, pseudo-second order, Elovich and intraparticle diffusion kinetic models. The results showed that the adsorption of Cd(II), Pb(II) and As(V) ions onto carp scale followed the pseudo-second-order kinetic model. Thermodynamic parameters, including the Gibbs free energy (Delta G(0)), enthalpy (Delta H-0), and entropy (Delta S-0) changes, indicated that the present adsorption process was feasible, spontaneous and endothermic in the temperature range of 20-40 degrees C.",
publisher = "Inst Materials Physics, Bucharest",
journal = "Digest Journal of Nanomaterials and Biostructures",
title = "Equilibrium, kinetic and thermodynamic studies on removal of Cd(II), Pb(II) and As(V) from wastewater using carp (cyprinus carpio) scales",
pages = "1590-1581",
number = "4",
volume = "8",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2429"
}

Bajić, Z. J., Đokić, V., Veličković, Z., Vuruna, M., Ristić, M., Ben Issa, N.,& Marinković, A.. (2013). Equilibrium, kinetic and thermodynamic studies on removal of Cd(II), Pb(II) and As(V) from wastewater using carp (cyprinus carpio) scales. in Digest Journal of Nanomaterials and Biostructures
Inst Materials Physics, Bucharest., 8(4), 1581-1590.
https://hdl.handle.net/21.15107/rcub_technorep_2429

Bajić ZJ, Đokić V, Veličković Z, Vuruna M, Ristić M, Ben Issa N, Marinković A. Equilibrium, kinetic and thermodynamic studies on removal of Cd(II), Pb(II) and As(V) from wastewater using carp (cyprinus carpio) scales. in Digest Journal of Nanomaterials and Biostructures. 2013;8(4):1581-1590.
https://hdl.handle.net/21.15107/rcub_technorep_2429 .

Bajić, Zoran J., Đokić, Veljko, Veličković, Zlate, Vuruna, Mladen, Ristić, Mirjana, Ben Issa, Nurredin, Marinković, Aleksandar, "Equilibrium, kinetic and thermodynamic studies on removal of Cd(II), Pb(II) and As(V) from wastewater using carp (cyprinus carpio) scales" in Digest Journal of Nanomaterials and Biostructures, 8, no. 4 (2013):1581-1590,
https://hdl.handle.net/21.15107/rcub_technorep_2429 .

TY  - JOUR
AU  - Veličković, Zlate
AU  - Bajić, Zoran J.
AU  - Ristić, Mirjana
AU  - Đokić, Veljko
AU  - Marinković, Aleksandar
AU  - Uskoković, Petar
AU  - Vuruna, Mladen
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2411
AB  - Multi-wall carbon nanotubes (MWCNTs) was functionalized with 6-arm amino polyethylene glycol (PEG), and synthesized PEG-MWCNTs was used as adsorbent in order to study adsorption characteristics with respect to Cd(II), Pb(II) and As(V) ions. In batch tests, the influence of contact time, initial metal ion concentration and temperature on the ion adsorption on PEG-MWCNTs was studied. Adsorption of Cd(II), Pb(II) and As(V) on PEG-MWCNTs strongly depends on pH. Time dependent adsorption can be described by intra-particular Weber-Morris kinetic model, and adsorption process was modelled by Koble-Corrigan isotherm, respectively. The maximum adsorption capacities of Cd(II), Pb(II) and As(V) on PEG-MWCNTs, for initial concentration of 10 mg dm(-3) and at pH=4, were 77.6, 47.5 and 13 mg g(-1) at 25 degrees C, respectively. The competitive adsorption studies showed that the adsorption affinity of ions towards PEG-MWCNTs showed largest adsorption of Cd(II) at pH 8, following by Pb(II) at pH 6, and As(V) at pH 4. Thermodynamic parameters showed that the adsorption of Cd(II), Pb(II) and As(V) ions was spontaneous and endothermic.
PB  - Inst Materials Physics, Bucharest
T2  - Digest Journal of Nanomaterials and Biostructures
T1  - Modification of multi-wall carbon nanotubes for the removal of cadmium, lead and arsenic from wastewater
EP  - 511
IS  - 2
SP  - 501
VL  - 8
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2411
ER  - 

@article{
author = "Veličković, Zlate and Bajić, Zoran J. and Ristić, Mirjana and Đokić, Veljko and Marinković, Aleksandar and Uskoković, Petar and Vuruna, Mladen",
year = "2013",
abstract = "Multi-wall carbon nanotubes (MWCNTs) was functionalized with 6-arm amino polyethylene glycol (PEG), and synthesized PEG-MWCNTs was used as adsorbent in order to study adsorption characteristics with respect to Cd(II), Pb(II) and As(V) ions. In batch tests, the influence of contact time, initial metal ion concentration and temperature on the ion adsorption on PEG-MWCNTs was studied. Adsorption of Cd(II), Pb(II) and As(V) on PEG-MWCNTs strongly depends on pH. Time dependent adsorption can be described by intra-particular Weber-Morris kinetic model, and adsorption process was modelled by Koble-Corrigan isotherm, respectively. The maximum adsorption capacities of Cd(II), Pb(II) and As(V) on PEG-MWCNTs, for initial concentration of 10 mg dm(-3) and at pH=4, were 77.6, 47.5 and 13 mg g(-1) at 25 degrees C, respectively. The competitive adsorption studies showed that the adsorption affinity of ions towards PEG-MWCNTs showed largest adsorption of Cd(II) at pH 8, following by Pb(II) at pH 6, and As(V) at pH 4. Thermodynamic parameters showed that the adsorption of Cd(II), Pb(II) and As(V) ions was spontaneous and endothermic.",
publisher = "Inst Materials Physics, Bucharest",
journal = "Digest Journal of Nanomaterials and Biostructures",
title = "Modification of multi-wall carbon nanotubes for the removal of cadmium, lead and arsenic from wastewater",
pages = "511-501",
number = "2",
volume = "8",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2411"
}

Veličković, Z., Bajić, Z. J., Ristić, M., Đokić, V., Marinković, A., Uskoković, P.,& Vuruna, M.. (2013). Modification of multi-wall carbon nanotubes for the removal of cadmium, lead and arsenic from wastewater. in Digest Journal of Nanomaterials and Biostructures
Inst Materials Physics, Bucharest., 8(2), 501-511.
https://hdl.handle.net/21.15107/rcub_technorep_2411

Veličković Z, Bajić ZJ, Ristić M, Đokić V, Marinković A, Uskoković P, Vuruna M. Modification of multi-wall carbon nanotubes for the removal of cadmium, lead and arsenic from wastewater. in Digest Journal of Nanomaterials and Biostructures. 2013;8(2):501-511.
https://hdl.handle.net/21.15107/rcub_technorep_2411 .

Veličković, Zlate, Bajić, Zoran J., Ristić, Mirjana, Đokić, Veljko, Marinković, Aleksandar, Uskoković, Petar, Vuruna, Mladen, "Modification of multi-wall carbon nanotubes for the removal of cadmium, lead and arsenic from wastewater" in Digest Journal of Nanomaterials and Biostructures, 8, no. 2 (2013):501-511,
https://hdl.handle.net/21.15107/rcub_technorep_2411 .