The effect of process parameters on kinetics and mechanisms of Co2+ removal by bone char
Nema prikaza
Autori
Dimović, SlavkoSmičiklas, Ivana D.
Šljivić-Ivanović, Marija Z.
Plećaš, Ilija B.
Slavković-Beškoski, Latinka J.
Članak u časopisu
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Bone char powder, composed mainly of poorly crystalline hydroxyapatite (Ca-10(PO4)(6)(OH)(2)), carbon and CaCO3, has potential applicability in the removal of Co2+ ions from contaminated effluents. In the present study, the influence of process parameters: particle size, agitation speed, initial pH and initial sorbate concentration, onto kinetics and mechanism of Co2+ sorption was studied and discussed. In order to describe and compare time evolution of the process under different conditions, the experimental data were analyzed using pseudo-first, pseudo-second and Vermeulens kinetic models. Generally, experimental results were best fitted with the pseudo-second-order model, which accurately predicted the equilibrium sorbed amounts. The pseudo-second-order rate constant was the most influenced by variations in initial metal concentration and pH, in the investigated ranges. The conclusions about sorption mechanism were derived based on Co2+ amounts sorbed during time, as well as conside...ring solution pH changes, changes of Ca2+ amounts released into liquid phase and Ca2+/Co2+ molar ratios. It was concluded that rapid sorption stage was governed by surface complexation reactions, whereas the contribution of the ion-exchange mechanism increased with time and became more significant in the second, slower phase. Experimentally determined maximum sorption capacity towards Co2+, under optimal conditions, was found to be 0.38 mmol/g. The results show that bone char represents cost-effective alternative to synthetic hydroxyapatite sorbent.
Ključne reči:
Bone char / Co2+ / sorption kinetics / kinetic modelsIzvor:
Journal of Environmental Science and Health. Part A: Toxic Hazardous Substances and Environmental Engineering, 2011, 46, 13, 1558-1569Finansiranje / projekti:
- Nove tehnologije za monitoring i zaštitu životnog okruženja od štetnih hemijskih supstanci i radijacionog opterećenja (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-43009)
DOI: 10.1080/10934529.2011.609454
ISSN: 1093-4529
PubMed: 22029698
WoS: 000298320600014
Scopus: 2-s2.0-84856149929
Institucija/grupa
VinčaTY - JOUR AU - Dimović, Slavko AU - Smičiklas, Ivana D. AU - Šljivić-Ivanović, Marija Z. AU - Plećaš, Ilija B. AU - Slavković-Beškoski, Latinka J. PY - 2011 UR - https://vinar.vin.bg.ac.rs/handle/123456789/4618 AB - Bone char powder, composed mainly of poorly crystalline hydroxyapatite (Ca-10(PO4)(6)(OH)(2)), carbon and CaCO3, has potential applicability in the removal of Co2+ ions from contaminated effluents. In the present study, the influence of process parameters: particle size, agitation speed, initial pH and initial sorbate concentration, onto kinetics and mechanism of Co2+ sorption was studied and discussed. In order to describe and compare time evolution of the process under different conditions, the experimental data were analyzed using pseudo-first, pseudo-second and Vermeulens kinetic models. Generally, experimental results were best fitted with the pseudo-second-order model, which accurately predicted the equilibrium sorbed amounts. The pseudo-second-order rate constant was the most influenced by variations in initial metal concentration and pH, in the investigated ranges. The conclusions about sorption mechanism were derived based on Co2+ amounts sorbed during time, as well as considering solution pH changes, changes of Ca2+ amounts released into liquid phase and Ca2+/Co2+ molar ratios. It was concluded that rapid sorption stage was governed by surface complexation reactions, whereas the contribution of the ion-exchange mechanism increased with time and became more significant in the second, slower phase. Experimentally determined maximum sorption capacity towards Co2+, under optimal conditions, was found to be 0.38 mmol/g. The results show that bone char represents cost-effective alternative to synthetic hydroxyapatite sorbent. T2 - Journal of Environmental Science and Health. Part A: Toxic Hazardous Substances and Environmental Engineering T1 - The effect of process parameters on kinetics and mechanisms of Co2+ removal by bone char VL - 46 IS - 13 SP - 1558 EP - 1569 DO - 10.1080/10934529.2011.609454 ER -
@article{ author = "Dimović, Slavko and Smičiklas, Ivana D. and Šljivić-Ivanović, Marija Z. and Plećaš, Ilija B. and Slavković-Beškoski, Latinka J.", year = "2011", abstract = "Bone char powder, composed mainly of poorly crystalline hydroxyapatite (Ca-10(PO4)(6)(OH)(2)), carbon and CaCO3, has potential applicability in the removal of Co2+ ions from contaminated effluents. In the present study, the influence of process parameters: particle size, agitation speed, initial pH and initial sorbate concentration, onto kinetics and mechanism of Co2+ sorption was studied and discussed. In order to describe and compare time evolution of the process under different conditions, the experimental data were analyzed using pseudo-first, pseudo-second and Vermeulens kinetic models. Generally, experimental results were best fitted with the pseudo-second-order model, which accurately predicted the equilibrium sorbed amounts. The pseudo-second-order rate constant was the most influenced by variations in initial metal concentration and pH, in the investigated ranges. The conclusions about sorption mechanism were derived based on Co2+ amounts sorbed during time, as well as considering solution pH changes, changes of Ca2+ amounts released into liquid phase and Ca2+/Co2+ molar ratios. It was concluded that rapid sorption stage was governed by surface complexation reactions, whereas the contribution of the ion-exchange mechanism increased with time and became more significant in the second, slower phase. Experimentally determined maximum sorption capacity towards Co2+, under optimal conditions, was found to be 0.38 mmol/g. The results show that bone char represents cost-effective alternative to synthetic hydroxyapatite sorbent.", journal = "Journal of Environmental Science and Health. Part A: Toxic Hazardous Substances and Environmental Engineering", title = "The effect of process parameters on kinetics and mechanisms of Co2+ removal by bone char", volume = "46", number = "13", pages = "1558-1569", doi = "10.1080/10934529.2011.609454" }
Dimović, S., Smičiklas, I. D., Šljivić-Ivanović, M. Z., Plećaš, I. B.,& Slavković-Beškoski, L. J.. (2011). The effect of process parameters on kinetics and mechanisms of Co2+ removal by bone char. in Journal of Environmental Science and Health. Part A: Toxic Hazardous Substances and Environmental Engineering, 46(13), 1558-1569. https://doi.org/10.1080/10934529.2011.609454
Dimović S, Smičiklas ID, Šljivić-Ivanović MZ, Plećaš IB, Slavković-Beškoski LJ. The effect of process parameters on kinetics and mechanisms of Co2+ removal by bone char. in Journal of Environmental Science and Health. Part A: Toxic Hazardous Substances and Environmental Engineering. 2011;46(13):1558-1569. doi:10.1080/10934529.2011.609454 .
Dimović, Slavko, Smičiklas, Ivana D., Šljivić-Ivanović, Marija Z., Plećaš, Ilija B., Slavković-Beškoski, Latinka J., "The effect of process parameters on kinetics and mechanisms of Co2+ removal by bone char" in Journal of Environmental Science and Health. Part A: Toxic Hazardous Substances and Environmental Engineering, 46, no. 13 (2011):1558-1569, https://doi.org/10.1080/10934529.2011.609454 . .