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Kinetics of sorptive removal of chromium(VI) from aqueous solutions by calcined Mg-Al-CO(3) hydrotalcite.
Water Res. 2003 Jul; 37(12):2875-82.WR

Abstract

The sorptive removal of hexavalent chromium from aqueous solutions by calcined Mg-Al-CO(3) hydrotalcite was investigated in a batch mode. The influence of agitation speed, solution pH, initial chromium concentration, sorbent concentration and temperature has been tested in kinetic runs. Three kinetic models have been evaluated to fit the experimental data: the pseudo-first order, the modified-second order and the Elovich equation. It was shown that the first-order model could best describe the sorption kinetics. A Freundlich isotherm was used to fit equilibrium experiments. Hydrotalcite presents a sorption capacity of approximately 120 mg Cr/g, under the investigated experimental conditions. The calculated activation energy for process studied was around 40 kJ/mol.

Authors+Show Affiliations

Lazaridis NK
Division of Chemical Technology, School of Chemistry, Aristotle University, Box 116, GR-54124 Thessaloniki, Greece. nlazarid@chem.auth.gr
Asouhidou DD
No affiliation info available

MeSH

AdsorptionAluminum HydroxideAntacidsCarcinogens, EnvironmentalChromiumKineticsMagnesium HydroxideModels, TheoreticalTemperature

Pub Type(s)

Journal Article

Language

eng

PubMed ID

12767290

Citation

Lazaridis, N K., and D D. Asouhidou. "Kinetics of Sorptive Removal of chromium(VI) From Aqueous Solutions By Calcined Mg-Al-CO(3) Hydrotalcite." Water Research, vol. 37, no. 12, 2003, pp. 2875-82.
Lazaridis NK, Asouhidou DD. Kinetics of sorptive removal of chromium(VI) from aqueous solutions by calcined Mg-Al-CO(3) hydrotalcite. Water Res. 2003;37(12):2875-82.
Lazaridis, N. K., & Asouhidou, D. D. (2003). Kinetics of sorptive removal of chromium(VI) from aqueous solutions by calcined Mg-Al-CO(3) hydrotalcite. Water Research, 37(12), 2875-82.
Lazaridis NK, Asouhidou DD. Kinetics of Sorptive Removal of chromium(VI) From Aqueous Solutions By Calcined Mg-Al-CO(3) Hydrotalcite. Water Res. 2003;37(12):2875-82. PubMed PMID: 12767290.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Kinetics of sorptive removal of chromium(VI) from aqueous solutions by calcined Mg-Al-CO(3) hydrotalcite. AU - Lazaridis,N K, AU - Asouhidou,D D, PY - 2003/5/28/pubmed PY - 2003/12/12/medline PY - 2003/5/28/entrez SP - 2875 EP - 82 JF - Water research JO - Water Res VL - 37 IS - 12 N2 - The sorptive removal of hexavalent chromium from aqueous solutions by calcined Mg-Al-CO(3) hydrotalcite was investigated in a batch mode. The influence of agitation speed, solution pH, initial chromium concentration, sorbent concentration and temperature has been tested in kinetic runs. Three kinetic models have been evaluated to fit the experimental data: the pseudo-first order, the modified-second order and the Elovich equation. It was shown that the first-order model could best describe the sorption kinetics. A Freundlich isotherm was used to fit equilibrium experiments. Hydrotalcite presents a sorption capacity of approximately 120 mg Cr/g, under the investigated experimental conditions. The calculated activation energy for process studied was around 40 kJ/mol. SN - 0043-1354 UR - https://www.unboundmedicine.com/medline/citation/12767290/Kinetics_of_sorptive_removal_of_chromium_VI__from_aqueous_solutions_by_calcined_Mg_Al_CO_3__hydrotalcite_ DB - PRIME DP - Unbound Medicine ER -