TY  - JOUR
AU  - Dimović, Slavko
AU  - Smičiklas, Ivana D.
AU  - Plećaš, Ilija B.
AU  - Antonović, Dušan
AU  - Mitrić, Miodrag
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3663
AB  - The objective of the present study was the evaluation of differently treated bovine bones for Co2+ removal from aqueous media. Powdered bones (B), as well as samples prepared by H2O2 oxidation (BH2O2) and annealing at 400-1000 degrees C (B400-B1000), were tested as sorbent materials. A combination of XRD, FTIR spectroscopies, DTA/TGA analyses, specific surface area (S-p) and point of zero charge (pH(PZC)) measurements was utilized for physicochemical characterization of sorbents. Sorption of Co2+ was studied in batch conditions as a function of pH, contact time and Co2+ concentration. Initial pH values in the range4-8 were found optimal for sorption experiments. Equilibrium time of 24 h was required in all investigated systems. The maximum sorption capacities differ significantly from 0.078 to 0.495 mmol/g, whereas the affinity towards Co2+ decreased in the order: B400 GT BH2O2 GT B600 GT B GT B800 GT B1000. The pseudo-second-order model and Langmuir theoretical equation were used for fitting the kinetic and equilibrium data, respectively. Ion-exchange with Ca2+ and specific cation sorption were identified as main removal mechanisms. The amounts of Co2+ desorbed from loaded bone sorbents increased with the decrease of pH as well as with the increase of Ca2+ concentration. Heating at 400 degrees C was found to be an optimal treatment for the production of the Co2+ removal agent. (C) 2008 Elsevier B.V. All rights reserved.
T2  - Journal of Hazardous Materials
T1  - Comparative study of differently treated animal bones for Co2+ removal
VL  - 164
IS  - 1
SP  - 279
EP  - 287
DO  - 10.1016/j.jhazmat.2008.08.013
ER  - 

@article{
author = "Dimović, Slavko and Smičiklas, Ivana D. and Plećaš, Ilija B. and Antonović, Dušan and Mitrić, Miodrag",
year = "2009",
abstract = "The objective of the present study was the evaluation of differently treated bovine bones for Co2+ removal from aqueous media. Powdered bones (B), as well as samples prepared by H2O2 oxidation (BH2O2) and annealing at 400-1000 degrees C (B400-B1000), were tested as sorbent materials. A combination of XRD, FTIR spectroscopies, DTA/TGA analyses, specific surface area (S-p) and point of zero charge (pH(PZC)) measurements was utilized for physicochemical characterization of sorbents. Sorption of Co2+ was studied in batch conditions as a function of pH, contact time and Co2+ concentration. Initial pH values in the range4-8 were found optimal for sorption experiments. Equilibrium time of 24 h was required in all investigated systems. The maximum sorption capacities differ significantly from 0.078 to 0.495 mmol/g, whereas the affinity towards Co2+ decreased in the order: B400 GT BH2O2 GT B600 GT B GT B800 GT B1000. The pseudo-second-order model and Langmuir theoretical equation were used for fitting the kinetic and equilibrium data, respectively. Ion-exchange with Ca2+ and specific cation sorption were identified as main removal mechanisms. The amounts of Co2+ desorbed from loaded bone sorbents increased with the decrease of pH as well as with the increase of Ca2+ concentration. Heating at 400 degrees C was found to be an optimal treatment for the production of the Co2+ removal agent. (C) 2008 Elsevier B.V. All rights reserved.",
journal = "Journal of Hazardous Materials",
title = "Comparative study of differently treated animal bones for Co2+ removal",
volume = "164",
number = "1",
pages = "279-287",
doi = "10.1016/j.jhazmat.2008.08.013"
}

Dimović, S., Smičiklas, I. D., Plećaš, I. B., Antonović, D.,& Mitrić, M.. (2009). Comparative study of differently treated animal bones for Co2+ removal. in Journal of Hazardous Materials, 164(1), 279-287.
https://doi.org/10.1016/j.jhazmat.2008.08.013

Dimović S, Smičiklas ID, Plećaš IB, Antonović D, Mitrić M. Comparative study of differently treated animal bones for Co2+ removal. in Journal of Hazardous Materials. 2009;164(1):279-287.
doi:10.1016/j.jhazmat.2008.08.013 .

Dimović, Slavko, Smičiklas, Ivana D., Plećaš, Ilija B., Antonović, Dušan, Mitrić, Miodrag, "Comparative study of differently treated animal bones for Co2+ removal" in Journal of Hazardous Materials, 164, no. 1 (2009):279-287,
https://doi.org/10.1016/j.jhazmat.2008.08.013 . .

TY  - JOUR
AU  - Šljivić-Ivanović, Marija Z.
AU  - Smičiklas, Ivana D.
AU  - Plećaš, Ilija B.
AU  - Mitrić, Miodrag
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3664
AB  - The influence of equilibration conditions and hydroxyapatite (HAP) physico-chemical properties onto retention of Cu2+ ions was studied in batch conditions. The amount of cation removed from the solution increased with increasing pH, reaching almost 100% at pH 3. 4 and 7 for 5 x 10(-4), 10(-3) and 5 x 10(-3) mol/dm(3) solutions. respectively. Contact time necessary for reaching equilibrium was found to increase with the increase of Cu2+ concentration. Kinetic and equilibrium data were best described by pseudo-second-order kinetic model and Langmuir theoretical model. The calculated values of separation factors and Gibbs free energy change confirmed that the sorption was spontaneous and thermodynamically feasible at room temperature. The experiments conducted using HAP samples with different physico-chemical characteristics have revealed that the amounts of sorbed Cu2+ depended mainly on the specific surface area and crystallinity of the applied powders. Desorption of Cu2+ was more efficient in acidic conditions than in the Solution of competing cation-Ca2+. The samples with higher sorption capacities also demonstrated higher stability; consequently, from the aspects of both higher sorption and lower desorption, utilization of low-crystalline HAP samples with high specific surface area was superior for immobilization of Cu2+ ions. Taking into account molar Cu/Ca ratios. observed final pH changes, copper speciation in the function of pH and the results of X-ray diffraction analyses, conclusions about sorption mechanisms at different experimental conditions were derived. (C) 2008 Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Journal
T1  - The influence of equilibration conditions and hydroxyapatite physico-chemical properties onto retention of Cu2+ ions
VL  - 148
IS  - 1
SP  - 80
EP  - 88
DO  - 10.1016/j.cej.2008.08.003
ER  - 

@article{
author = "Šljivić-Ivanović, Marija Z. and Smičiklas, Ivana D. and Plećaš, Ilija B. and Mitrić, Miodrag",
year = "2009",
abstract = "The influence of equilibration conditions and hydroxyapatite (HAP) physico-chemical properties onto retention of Cu2+ ions was studied in batch conditions. The amount of cation removed from the solution increased with increasing pH, reaching almost 100% at pH 3. 4 and 7 for 5 x 10(-4), 10(-3) and 5 x 10(-3) mol/dm(3) solutions. respectively. Contact time necessary for reaching equilibrium was found to increase with the increase of Cu2+ concentration. Kinetic and equilibrium data were best described by pseudo-second-order kinetic model and Langmuir theoretical model. The calculated values of separation factors and Gibbs free energy change confirmed that the sorption was spontaneous and thermodynamically feasible at room temperature. The experiments conducted using HAP samples with different physico-chemical characteristics have revealed that the amounts of sorbed Cu2+ depended mainly on the specific surface area and crystallinity of the applied powders. Desorption of Cu2+ was more efficient in acidic conditions than in the Solution of competing cation-Ca2+. The samples with higher sorption capacities also demonstrated higher stability; consequently, from the aspects of both higher sorption and lower desorption, utilization of low-crystalline HAP samples with high specific surface area was superior for immobilization of Cu2+ ions. Taking into account molar Cu/Ca ratios. observed final pH changes, copper speciation in the function of pH and the results of X-ray diffraction analyses, conclusions about sorption mechanisms at different experimental conditions were derived. (C) 2008 Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Journal",
title = "The influence of equilibration conditions and hydroxyapatite physico-chemical properties onto retention of Cu2+ ions",
volume = "148",
number = "1",
pages = "80-88",
doi = "10.1016/j.cej.2008.08.003"
}

Šljivić-Ivanović, M. Z., Smičiklas, I. D., Plećaš, I. B.,& Mitrić, M.. (2009). The influence of equilibration conditions and hydroxyapatite physico-chemical properties onto retention of Cu2+ ions. in Chemical Engineering Journal, 148(1), 80-88.
https://doi.org/10.1016/j.cej.2008.08.003

Šljivić-Ivanović MZ, Smičiklas ID, Plećaš IB, Mitrić M. The influence of equilibration conditions and hydroxyapatite physico-chemical properties onto retention of Cu2+ ions. in Chemical Engineering Journal. 2009;148(1):80-88.
doi:10.1016/j.cej.2008.08.003 .

Šljivić-Ivanović, Marija Z., Smičiklas, Ivana D., Plećaš, Ilija B., Mitrić, Miodrag, "The influence of equilibration conditions and hydroxyapatite physico-chemical properties onto retention of Cu2+ ions" in Chemical Engineering Journal, 148, no. 1 (2009):80-88,
https://doi.org/10.1016/j.cej.2008.08.003 . .