TY  - JOUR
AU  - Stojaković, Đorđe
AU  - Jovanović, Mina
AU  - Rajić, Nevenka
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3501
AB  - The present study was aimed at examining the ability of the natural zeolitic tuff from the Zlatokop deposit in Serbia to remove Pb(II) ions from aqueous solutions under various conditions. It has been found that the adsorption proceeds via an ion-exchange reaction in which the Na+ ions from the clinoptilolite phase of the tuff are replaced to a high degree by aqueous Pb(II) ions. The removal capacity of the clinoptilolite at 298 K varies from 78 mg Pb g(-1) (for C-0 = 100 mg Pb dm-3) to 92.5 mg Pb g(-1) (for C-0 = 400 mg Pb dm(-3)), the capacity markedly increasing with temperature. The adsorption isotherm is in accord with the Langmuir model. The ion-exchange kinetics can be best described by the pseudo-second-order model. Intra-particle diffusion of Pb2+ is present in the process, but it is not the rate-limiting step and that can be explained by a modification of the Pb(II) hydration sphere during the ion-exchange. From the adsorption of Pb(II) on the studied zeolitic tuff, it is revealed that the ion-exchange process is spontaneous and endothermic, and that the standard free energy decreases with temperature.
PB  - Gheorghe Asachi Technical University of Iasi, Romania
T2  - Environmental Engineering and Management Journal
T1  - Lead(ii) removal from aqueous solutions by Serbian zeolitic tuff
EP  - 140
IS  - 1
SP  - 131
VL  - 16
DO  - 10.30638/eemj.2017.015
ER  - 

@article{
author = "Stojaković, Đorđe and Jovanović, Mina and Rajić, Nevenka",
year = "2017",
abstract = "The present study was aimed at examining the ability of the natural zeolitic tuff from the Zlatokop deposit in Serbia to remove Pb(II) ions from aqueous solutions under various conditions. It has been found that the adsorption proceeds via an ion-exchange reaction in which the Na+ ions from the clinoptilolite phase of the tuff are replaced to a high degree by aqueous Pb(II) ions. The removal capacity of the clinoptilolite at 298 K varies from 78 mg Pb g(-1) (for C-0 = 100 mg Pb dm-3) to 92.5 mg Pb g(-1) (for C-0 = 400 mg Pb dm(-3)), the capacity markedly increasing with temperature. The adsorption isotherm is in accord with the Langmuir model. The ion-exchange kinetics can be best described by the pseudo-second-order model. Intra-particle diffusion of Pb2+ is present in the process, but it is not the rate-limiting step and that can be explained by a modification of the Pb(II) hydration sphere during the ion-exchange. From the adsorption of Pb(II) on the studied zeolitic tuff, it is revealed that the ion-exchange process is spontaneous and endothermic, and that the standard free energy decreases with temperature.",
publisher = "Gheorghe Asachi Technical University of Iasi, Romania",
journal = "Environmental Engineering and Management Journal",
title = "Lead(ii) removal from aqueous solutions by Serbian zeolitic tuff",
pages = "140-131",
number = "1",
volume = "16",
doi = "10.30638/eemj.2017.015"
}

Stojaković, Đ., Jovanović, M.,& Rajić, N.. (2017). Lead(ii) removal from aqueous solutions by Serbian zeolitic tuff. in Environmental Engineering and Management Journal
Gheorghe Asachi Technical University of Iasi, Romania., 16(1), 131-140.
https://doi.org/10.30638/eemj.2017.015

Stojaković Đ, Jovanović M, Rajić N. Lead(ii) removal from aqueous solutions by Serbian zeolitic tuff. in Environmental Engineering and Management Journal. 2017;16(1):131-140.
doi:10.30638/eemj.2017.015 .

Stojaković, Đorđe, Jovanović, Mina, Rajić, Nevenka, "Lead(ii) removal from aqueous solutions by Serbian zeolitic tuff" in Environmental Engineering and Management Journal, 16, no. 1 (2017):131-140,
https://doi.org/10.30638/eemj.2017.015 . .

TY  - JOUR
AU  - Jovanović, Mina
AU  - Arcon, Iztok
AU  - Kovač, Janez
AU  - Novak-Tusar, Nataša
AU  - Obradović, Bojana
AU  - Rajić, Nevenka
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3440
AB  - In this study the uptake capacity of Mn(II) ions by zeolite A beads was investigated for different initial Mn concentration (100-400 mg Mn dm(-3)) in batch mode at 25-55 degrees C. The obtained adsorption capacity varying from 30 to 50 mg Mn g(-1) demonstrated a high affinity of zeolite A towards Mn(II) present in solutions. Kinetic studies indicated the intra-particle diffusion as the rate limiting step up to 45 degrees C with apparent diffusivities in the range (1.2-2.0) x 10(-13) m(2) s(-1) and the activation energy of 21.9 kJ mol(-1), which implies strong interactions between the zeolite A and Mn ions. At 55 degrees C ion-exchange became the rate limiting step. The adsorption isotherms were studied at 25 degrees C showing that the Mn adsorption is the best described by the Langmuir model suggesting a homogenous zeolite surface. XPS analysis of the Mn-loaded beads showed that there is no surface accumulation of Mn but an almost uniform Mn distribution inside zeolite A, whereas XANES and EXAFS suggested that the adsorption of Mn(II) was followed by the Mn(II) oxidation and oxide formation. Regeneration of the spent zeolite was examined in 8 adsorption/desorption cycles by a chelating Na(2)EDTA in a fluidized column. It has been found that zeolite A beads could be reused for at least 4 cycles with satisfactory Mn(II) adsorption efficiencies of about 70%.
PB  - Elsevier Science Bv, Amsterdam
T2  - Microporous and Mesoporous Materials
T1  - Removal of manganese in batch and fluidized bed systems using beads of zeolite a as adsorbent
EP  - 385
SP  - 378
VL  - 226
DO  - 10.1016/j.micromeso.2016.02.026
ER  - 

@article{
author = "Jovanović, Mina and Arcon, Iztok and Kovač, Janez and Novak-Tusar, Nataša and Obradović, Bojana and Rajić, Nevenka",
year = "2016",
abstract = "In this study the uptake capacity of Mn(II) ions by zeolite A beads was investigated for different initial Mn concentration (100-400 mg Mn dm(-3)) in batch mode at 25-55 degrees C. The obtained adsorption capacity varying from 30 to 50 mg Mn g(-1) demonstrated a high affinity of zeolite A towards Mn(II) present in solutions. Kinetic studies indicated the intra-particle diffusion as the rate limiting step up to 45 degrees C with apparent diffusivities in the range (1.2-2.0) x 10(-13) m(2) s(-1) and the activation energy of 21.9 kJ mol(-1), which implies strong interactions between the zeolite A and Mn ions. At 55 degrees C ion-exchange became the rate limiting step. The adsorption isotherms were studied at 25 degrees C showing that the Mn adsorption is the best described by the Langmuir model suggesting a homogenous zeolite surface. XPS analysis of the Mn-loaded beads showed that there is no surface accumulation of Mn but an almost uniform Mn distribution inside zeolite A, whereas XANES and EXAFS suggested that the adsorption of Mn(II) was followed by the Mn(II) oxidation and oxide formation. Regeneration of the spent zeolite was examined in 8 adsorption/desorption cycles by a chelating Na(2)EDTA in a fluidized column. It has been found that zeolite A beads could be reused for at least 4 cycles with satisfactory Mn(II) adsorption efficiencies of about 70%.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Microporous and Mesoporous Materials",
title = "Removal of manganese in batch and fluidized bed systems using beads of zeolite a as adsorbent",
pages = "385-378",
volume = "226",
doi = "10.1016/j.micromeso.2016.02.026"
}

Jovanović, M., Arcon, I., Kovač, J., Novak-Tusar, N., Obradović, B.,& Rajić, N.. (2016). Removal of manganese in batch and fluidized bed systems using beads of zeolite a as adsorbent. in Microporous and Mesoporous Materials
Elsevier Science Bv, Amsterdam., 226, 378-385.
https://doi.org/10.1016/j.micromeso.2016.02.026

Jovanović M, Arcon I, Kovač J, Novak-Tusar N, Obradović B, Rajić N. Removal of manganese in batch and fluidized bed systems using beads of zeolite a as adsorbent. in Microporous and Mesoporous Materials. 2016;226:378-385.
doi:10.1016/j.micromeso.2016.02.026 .

Jovanović, Mina, Arcon, Iztok, Kovač, Janez, Novak-Tusar, Nataša, Obradović, Bojana, Rajić, Nevenka, "Removal of manganese in batch and fluidized bed systems using beads of zeolite a as adsorbent" in Microporous and Mesoporous Materials, 226 (2016):378-385,
https://doi.org/10.1016/j.micromeso.2016.02.026 . .

TY  - JOUR
AU  - Jovanović, Mina
AU  - Grbavčić, Željko
AU  - Rajić, Nevenka
AU  - Obradović, Bojana
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2669
AB  - This study investigated potentials of fluidized bed systems with zeolite A beads for removal of heavy metal ions from aqueous solutions. Two commercial zeolite bead fractions (0.7 and 2.2 mm in diameter) were used, while Cu(II) served as a model ion. Fluidized bed systems were characterized first regarding the hydrodynamic properties so that the operating regime was determined between the minimum fluidization velocity and the terminal velocity, corresponding to 0.2 and 5.6 cm s(-1), respectively, for smaller beads, and 2.0 and 13.2 cm s(-1), respectively, for larger beads. Cu(II) sorption kinetics was studied next in the fluidized system with recirculation and at the initial Cu(II) concentration of 300 mg dm(-3) at selected superficial velocities of 2.6 and 3.0 cm s(-1), for small and large beads, respectively. In parallel, Cu(II) sorption kinetics was studied in shaken flasks. In both systems and for both zeolite A bead fractions, intra-particle diffusion was shown to be the rate limiting step. Calculated Cu(II) cliffusivities were in the range of (2-15) x 10(-13) m(-2) s(-1) with slightly higher values determined in fluidized bed systems and for larger beads. These slight variations were explained by minor differences in the texture of small and large beads. Still, diffusion through the zeolite lattice was indicated as the slowest step in the process. The maximal sorption capacity of zeolite A beads for Cu(II) at 20 degrees C was predicted as 23.3 mg g(-1) based on the Langmuir model applied to the sorption isotherm. Results from the present study have shown potentials for the use of zeolite A beads in fluidized bed systems for removal of heavy metals from industrial wastewaters.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Chemical Engineering Science
T1  - Removal of Cu(II) from aqueous solutions by using fluidized zeolite A beads: Hydrodynamic and sorption studies
EP  - 92
SP  - 85
VL  - 117
DO  - 10.1016/j.ces.2014.06.017
ER  - 

@article{
author = "Jovanović, Mina and Grbavčić, Željko and Rajić, Nevenka and Obradović, Bojana",
year = "2014",
abstract = "This study investigated potentials of fluidized bed systems with zeolite A beads for removal of heavy metal ions from aqueous solutions. Two commercial zeolite bead fractions (0.7 and 2.2 mm in diameter) were used, while Cu(II) served as a model ion. Fluidized bed systems were characterized first regarding the hydrodynamic properties so that the operating regime was determined between the minimum fluidization velocity and the terminal velocity, corresponding to 0.2 and 5.6 cm s(-1), respectively, for smaller beads, and 2.0 and 13.2 cm s(-1), respectively, for larger beads. Cu(II) sorption kinetics was studied next in the fluidized system with recirculation and at the initial Cu(II) concentration of 300 mg dm(-3) at selected superficial velocities of 2.6 and 3.0 cm s(-1), for small and large beads, respectively. In parallel, Cu(II) sorption kinetics was studied in shaken flasks. In both systems and for both zeolite A bead fractions, intra-particle diffusion was shown to be the rate limiting step. Calculated Cu(II) cliffusivities were in the range of (2-15) x 10(-13) m(-2) s(-1) with slightly higher values determined in fluidized bed systems and for larger beads. These slight variations were explained by minor differences in the texture of small and large beads. Still, diffusion through the zeolite lattice was indicated as the slowest step in the process. The maximal sorption capacity of zeolite A beads for Cu(II) at 20 degrees C was predicted as 23.3 mg g(-1) based on the Langmuir model applied to the sorption isotherm. Results from the present study have shown potentials for the use of zeolite A beads in fluidized bed systems for removal of heavy metals from industrial wastewaters.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Chemical Engineering Science",
title = "Removal of Cu(II) from aqueous solutions by using fluidized zeolite A beads: Hydrodynamic and sorption studies",
pages = "92-85",
volume = "117",
doi = "10.1016/j.ces.2014.06.017"
}

Jovanović, M., Grbavčić, Ž., Rajić, N.,& Obradović, B.. (2014). Removal of Cu(II) from aqueous solutions by using fluidized zeolite A beads: Hydrodynamic and sorption studies. in Chemical Engineering Science
Pergamon-Elsevier Science Ltd, Oxford., 117, 85-92.
https://doi.org/10.1016/j.ces.2014.06.017

Jovanović M, Grbavčić Ž, Rajić N, Obradović B. Removal of Cu(II) from aqueous solutions by using fluidized zeolite A beads: Hydrodynamic and sorption studies. in Chemical Engineering Science. 2014;117:85-92.
doi:10.1016/j.ces.2014.06.017 .

Jovanović, Mina, Grbavčić, Željko, Rajić, Nevenka, Obradović, Bojana, "Removal of Cu(II) from aqueous solutions by using fluidized zeolite A beads: Hydrodynamic and sorption studies" in Chemical Engineering Science, 117 (2014):85-92,
https://doi.org/10.1016/j.ces.2014.06.017 . .

TY  - JOUR
AU  - Jovanović, Mina
AU  - Rajić, Nevenka
AU  - Obradović, Bojana
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2114
AB  - Removal of heavy metal ions from aqueous solutions using zeolites is widely described by pseudo-second order kinetics although this model may not be valid under all conditions. In this work, we have extended approaches used for derivation of this model in order to develop a novel kinetic model that is related to the ion exchange mechanism underlying sorption of metal ions in zeolites. The novel model assumed two reversible steps. i.e. release of sodium ions from the zeolite lattice followed by bonding of the metal ion. The model was applied to experimental results of Cu(II) sorption by natural clinoptilolite-rich zeolitic tuff at different initial concentrations and temperatures and then validated by predictions of ion exchange kinetics of other divalent heavy metal ions (i.e. Mn(II), Zn(II) and Pb(II)). Model predictions were in excellent agreements with experimental data for all investigated systems. In regard to the proposed mechanism, modeling results implied that the sodium ion release rate was constant for all investigated metals while the overall rate was mainly determined by the rate of heavy metal ion bonding to the lattice. In addition, prediction capabilities of the novel model were demonstrated requiring one experimentally determined parameter, only.
PB  - Elsevier, Amsterdam
T2  - Journal of Hazardous Materials
T1  - Novel kinetic model of the removal of divalent heavy metal ions from aqueous solutions by natural clinoptilolite
EP  - 64
SP  - 57
VL  - 233
DO  - 10.1016/j.jhazmat.2012.06.052
ER  - 

@article{
author = "Jovanović, Mina and Rajić, Nevenka and Obradović, Bojana",
year = "2012",
abstract = "Removal of heavy metal ions from aqueous solutions using zeolites is widely described by pseudo-second order kinetics although this model may not be valid under all conditions. In this work, we have extended approaches used for derivation of this model in order to develop a novel kinetic model that is related to the ion exchange mechanism underlying sorption of metal ions in zeolites. The novel model assumed two reversible steps. i.e. release of sodium ions from the zeolite lattice followed by bonding of the metal ion. The model was applied to experimental results of Cu(II) sorption by natural clinoptilolite-rich zeolitic tuff at different initial concentrations and temperatures and then validated by predictions of ion exchange kinetics of other divalent heavy metal ions (i.e. Mn(II), Zn(II) and Pb(II)). Model predictions were in excellent agreements with experimental data for all investigated systems. In regard to the proposed mechanism, modeling results implied that the sodium ion release rate was constant for all investigated metals while the overall rate was mainly determined by the rate of heavy metal ion bonding to the lattice. In addition, prediction capabilities of the novel model were demonstrated requiring one experimentally determined parameter, only.",
publisher = "Elsevier, Amsterdam",
journal = "Journal of Hazardous Materials",
title = "Novel kinetic model of the removal of divalent heavy metal ions from aqueous solutions by natural clinoptilolite",
pages = "64-57",
volume = "233",
doi = "10.1016/j.jhazmat.2012.06.052"
}

Jovanović, M., Rajić, N.,& Obradović, B.. (2012). Novel kinetic model of the removal of divalent heavy metal ions from aqueous solutions by natural clinoptilolite. in Journal of Hazardous Materials
Elsevier, Amsterdam., 233, 57-64.
https://doi.org/10.1016/j.jhazmat.2012.06.052

Jovanović M, Rajić N, Obradović B. Novel kinetic model of the removal of divalent heavy metal ions from aqueous solutions by natural clinoptilolite. in Journal of Hazardous Materials. 2012;233:57-64.
doi:10.1016/j.jhazmat.2012.06.052 .

Jovanović, Mina, Rajić, Nevenka, Obradović, Bojana, "Novel kinetic model of the removal of divalent heavy metal ions from aqueous solutions by natural clinoptilolite" in Journal of Hazardous Materials, 233 (2012):57-64,
https://doi.org/10.1016/j.jhazmat.2012.06.052 . .

TY  - CONF
AU  - Jovanović, Mina
AU  - Rajić, Nevenka
AU  - Obradović, Bojana
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5210
PB  - Editorial Universitat Politècnica de València
C3  - 5th International FEZA Conference - Book of Abstracts
T1  - Cu(II) sorption on natural clinoptilolite: experiments and kinetics modeling
SP  - 232
UR  - https://hdl.handle.net/21.15107/rcub_technorep_5210
ER  - 

@conference{
author = "Jovanović, Mina and Rajić, Nevenka and Obradović, Bojana",
year = "2011",
publisher = "Editorial Universitat Politècnica de València",
journal = "5th International FEZA Conference - Book of Abstracts",
title = "Cu(II) sorption on natural clinoptilolite: experiments and kinetics modeling",
pages = "232",
url = "https://hdl.handle.net/21.15107/rcub_technorep_5210"
}

Jovanović, M., Rajić, N.,& Obradović, B.. (2011). Cu(II) sorption on natural clinoptilolite: experiments and kinetics modeling. in 5th International FEZA Conference - Book of Abstracts
Editorial Universitat Politècnica de València., 232.
https://hdl.handle.net/21.15107/rcub_technorep_5210

Jovanović M, Rajić N, Obradović B. Cu(II) sorption on natural clinoptilolite: experiments and kinetics modeling. in 5th International FEZA Conference - Book of Abstracts. 2011;:232.
https://hdl.handle.net/21.15107/rcub_technorep_5210 .

Jovanović, Mina, Rajić, Nevenka, Obradović, Bojana, "Cu(II) sorption on natural clinoptilolite: experiments and kinetics modeling" in 5th International FEZA Conference - Book of Abstracts (2011):232,
https://hdl.handle.net/21.15107/rcub_technorep_5210 .

TY  - JOUR
AU  - Nikačević, Nikola
AU  - Jovanović, Mina
AU  - Petkovska, Menka
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1958
AB  - A steady-state, one-dimensional mathematical model for a multifunctional reactor with in situ adsorption for ammonia synthesis is developed. The model represents integrated ammonia catalytic equilibrium reaction with ammonia adsorption in a co-current gas-flowing solids-fixed bed reactor (GFSFBR). The model was used for simulating the performance of an industrial-scale reactor, which confirmed that the reactant conversion is significantly higher in the multifunctional reactor in comparison to the conventional reactor under optimal conditions. The analysis of the simulation results shows that the conversion in the GFSFBR stays higher than those in the classical reactor even if much lower temperatures and pressures are used.
PB  - Elsevier, Amsterdam
T2  - Chemical Engineering Research & Design
T1  - Enhanced ammonia synthesis in multifunctional reactor with in situ adsorption
EP  - 404
IS  - 4A
SP  - 398
VL  - 89
DO  - 10.1016/j.cherd.2010.08.011
ER  - 

@article{
author = "Nikačević, Nikola and Jovanović, Mina and Petkovska, Menka",
year = "2011",
abstract = "A steady-state, one-dimensional mathematical model for a multifunctional reactor with in situ adsorption for ammonia synthesis is developed. The model represents integrated ammonia catalytic equilibrium reaction with ammonia adsorption in a co-current gas-flowing solids-fixed bed reactor (GFSFBR). The model was used for simulating the performance of an industrial-scale reactor, which confirmed that the reactant conversion is significantly higher in the multifunctional reactor in comparison to the conventional reactor under optimal conditions. The analysis of the simulation results shows that the conversion in the GFSFBR stays higher than those in the classical reactor even if much lower temperatures and pressures are used.",
publisher = "Elsevier, Amsterdam",
journal = "Chemical Engineering Research & Design",
title = "Enhanced ammonia synthesis in multifunctional reactor with in situ adsorption",
pages = "404-398",
number = "4A",
volume = "89",
doi = "10.1016/j.cherd.2010.08.011"
}

Nikačević, N., Jovanović, M.,& Petkovska, M.. (2011). Enhanced ammonia synthesis in multifunctional reactor with in situ adsorption. in Chemical Engineering Research & Design
Elsevier, Amsterdam., 89(4A), 398-404.
https://doi.org/10.1016/j.cherd.2010.08.011

Nikačević N, Jovanović M, Petkovska M. Enhanced ammonia synthesis in multifunctional reactor with in situ adsorption. in Chemical Engineering Research & Design. 2011;89(4A):398-404.
doi:10.1016/j.cherd.2010.08.011 .

Nikačević, Nikola, Jovanović, Mina, Petkovska, Menka, "Enhanced ammonia synthesis in multifunctional reactor with in situ adsorption" in Chemical Engineering Research & Design, 89, no. 4A (2011):398-404,
https://doi.org/10.1016/j.cherd.2010.08.011 . .

TY  - CONF
AU  - Rajić, Nevenka
AU  - Stojaković, Đorđe
AU  - Jevtić, Sanja
AU  - Jovanović, Mina
AU  - Zabukovec Logar, Nataša
AU  - Mazaj, Matjaž
AU  - Kaučič, Venčeslav
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5209
PB  - University of Nova Gorica, Slovenia
C3  - 11th European Meeting on Environmental Chemistry - Book of Abstracts
T1  - On the removal of aqueous manganese, nickel and zinc ions using the natural clinoptilolite
SP  - 181
UR  - https://hdl.handle.net/21.15107/rcub_technorep_5209
ER  - 

@conference{
author = "Rajić, Nevenka and Stojaković, Đorđe and Jevtić, Sanja and Jovanović, Mina and Zabukovec Logar, Nataša and Mazaj, Matjaž and Kaučič, Venčeslav",
year = "2010",
publisher = "University of Nova Gorica, Slovenia",
journal = "11th European Meeting on Environmental Chemistry - Book of Abstracts",
title = "On the removal of aqueous manganese, nickel and zinc ions using the natural clinoptilolite",
pages = "181",
url = "https://hdl.handle.net/21.15107/rcub_technorep_5209"
}

Rajić, N., Stojaković, Đ., Jevtić, S., Jovanović, M., Zabukovec Logar, N., Mazaj, M.,& Kaučič, V.. (2010). On the removal of aqueous manganese, nickel and zinc ions using the natural clinoptilolite. in 11th European Meeting on Environmental Chemistry - Book of Abstracts
University of Nova Gorica, Slovenia., 181.
https://hdl.handle.net/21.15107/rcub_technorep_5209

Rajić N, Stojaković Đ, Jevtić S, Jovanović M, Zabukovec Logar N, Mazaj M, Kaučič V. On the removal of aqueous manganese, nickel and zinc ions using the natural clinoptilolite. in 11th European Meeting on Environmental Chemistry - Book of Abstracts. 2010;:181.
https://hdl.handle.net/21.15107/rcub_technorep_5209 .

Rajić, Nevenka, Stojaković, Đorđe, Jevtić, Sanja, Jovanović, Mina, Zabukovec Logar, Nataša, Mazaj, Matjaž, Kaučič, Venčeslav, "On the removal of aqueous manganese, nickel and zinc ions using the natural clinoptilolite" in 11th European Meeting on Environmental Chemistry - Book of Abstracts (2010):181,
https://hdl.handle.net/21.15107/rcub_technorep_5209 .

TY  - JOUR
AU  - Rajić, Nevenka
AU  - Stojaković, Đorđe
AU  - Jovanović, Mina
AU  - Zabukovec-Logar, Nataša
AU  - Mazaj, Matjaz
AU  - Kaučič, Venčeslav
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1726
AB  - The natural zeolite tuff (clinoptilolite) from a Serbian deposit has been studied as adsorbent for Ni(II) ions from aqueous solutions. Its sorption capacity at 298K varies from 1.9mg Nig(-1) (for the initial solution concentration of 100mg Nidm(-3)) to 3.8mg Nig(-1) (for C-0 = 600mgNidm(-3)) and it increases 3 times at 338 K. The sorption is best described by the Sips isotherm model. The sorption kinetics follows the pseudo-second-order model, the activation energies being 7.44, 5.86, 6.62 and 6.63 kJ mol(-1) for C-0 = 100, 200, 300 and 400mg Nidm(-3), respectively. The sorption involves a film diffusion, an intra-particle diffusion, and a chemical cation-exchange between the Na+ ions of clinoptilolite and the Ni2+ ions. The sorption is endothermic (Delta H degrees being 37.9, 33.4, 30.0, 27.7 and 24.3 kJ mol(-1) for C-0 = 100, 200, 300, 400 and 600mg Nidm(-3), respectively) and spontaneous in the 298-338K temperature range. Thermal treatment of the Ni(II)-loaded clinoptilolite results in the formation of spherical nano-NiO particles of approx. 5 nm in diameter which are randomly dispersed in the clinoptilolite lattice.
PB  - Elsevier Science Bv, Amsterdam
T2  - Applied Surface Science
T1  - Removal of nickel(II) ions from aqueous solutions using the natural clinoptilolite and preparation of nano-NiO on the exhausted clinoptilolite
EP  - 1532
IS  - 5
SP  - 1524
VL  - 257
DO  - 10.1016/j.apsusc.2010.08.090
ER  - 

@article{
author = "Rajić, Nevenka and Stojaković, Đorđe and Jovanović, Mina and Zabukovec-Logar, Nataša and Mazaj, Matjaz and Kaučič, Venčeslav",
year = "2010",
abstract = "The natural zeolite tuff (clinoptilolite) from a Serbian deposit has been studied as adsorbent for Ni(II) ions from aqueous solutions. Its sorption capacity at 298K varies from 1.9mg Nig(-1) (for the initial solution concentration of 100mg Nidm(-3)) to 3.8mg Nig(-1) (for C-0 = 600mgNidm(-3)) and it increases 3 times at 338 K. The sorption is best described by the Sips isotherm model. The sorption kinetics follows the pseudo-second-order model, the activation energies being 7.44, 5.86, 6.62 and 6.63 kJ mol(-1) for C-0 = 100, 200, 300 and 400mg Nidm(-3), respectively. The sorption involves a film diffusion, an intra-particle diffusion, and a chemical cation-exchange between the Na+ ions of clinoptilolite and the Ni2+ ions. The sorption is endothermic (Delta H degrees being 37.9, 33.4, 30.0, 27.7 and 24.3 kJ mol(-1) for C-0 = 100, 200, 300, 400 and 600mg Nidm(-3), respectively) and spontaneous in the 298-338K temperature range. Thermal treatment of the Ni(II)-loaded clinoptilolite results in the formation of spherical nano-NiO particles of approx. 5 nm in diameter which are randomly dispersed in the clinoptilolite lattice.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Applied Surface Science",
title = "Removal of nickel(II) ions from aqueous solutions using the natural clinoptilolite and preparation of nano-NiO on the exhausted clinoptilolite",
pages = "1532-1524",
number = "5",
volume = "257",
doi = "10.1016/j.apsusc.2010.08.090"
}

Rajić, N., Stojaković, Đ., Jovanović, M., Zabukovec-Logar, N., Mazaj, M.,& Kaučič, V.. (2010). Removal of nickel(II) ions from aqueous solutions using the natural clinoptilolite and preparation of nano-NiO on the exhausted clinoptilolite. in Applied Surface Science
Elsevier Science Bv, Amsterdam., 257(5), 1524-1532.
https://doi.org/10.1016/j.apsusc.2010.08.090

Rajić N, Stojaković Đ, Jovanović M, Zabukovec-Logar N, Mazaj M, Kaučič V. Removal of nickel(II) ions from aqueous solutions using the natural clinoptilolite and preparation of nano-NiO on the exhausted clinoptilolite. in Applied Surface Science. 2010;257(5):1524-1532.
doi:10.1016/j.apsusc.2010.08.090 .

Rajić, Nevenka, Stojaković, Đorđe, Jovanović, Mina, Zabukovec-Logar, Nataša, Mazaj, Matjaz, Kaučič, Venčeslav, "Removal of nickel(II) ions from aqueous solutions using the natural clinoptilolite and preparation of nano-NiO on the exhausted clinoptilolite" in Applied Surface Science, 257, no. 5 (2010):1524-1532,
https://doi.org/10.1016/j.apsusc.2010.08.090 . .