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Adsorption of Cr(VI) from aqueous solution by hydrous zirconium oxide.
J Hazard Mater. 2010 Jan 15; 173(1-3):630-6.JH

Abstract

A type of ZrO(2).nH(2)O was synthesized and its Cr(VI) removal potential was investigated in this study. The kinetic study, adsorption isotherm, pH effect, thermodynamic study and desorption were examined in batch experiments. The kinetic process was described by a pseudo-second-order rate model very well. The Cr(VI) adsorption tended to increase with a decrease of pH. The adsorption data fitted well to the Langmuir model. The adsorption capacity increased from 61 to 66 mg g(-1) when the temperature was increased from 298 to 338 K. The positive values of both Delta H degrees and DeltaS degrees suggest an endothermic reaction and increase in randomness at the solid-liquid interface during the adsorption. Delta G degrees values obtained were negative indicating a spontaneous adsorption process. The effective desorption of Cr(VI) on ZrO(2).nH(2)O could be achieved using distilled water at pH 12.

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Authors+Show Affiliations

Rodrigues LA
Escola de Engenharia de Lorena, Universidade de São Paulo, CP. 116, Lorena, São Paulo, Brazil. lika_eng@yahoo.com.br
Maschio LJ
No affiliation info available
da Silva RE
No affiliation info available
da Silva ML
No affiliation info available

MeSH

AdsorptionAlgorithmsChromiumHydrogen-Ion ConcentrationIndustrial WasteKineticsSolutionsThermodynamicsThermogravimetryWaterWater Pollutants, ChemicalWater PurificationZirconium

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19748728

Citation

Rodrigues, Liana Alvares, et al. "Adsorption of Cr(VI) From Aqueous Solution By Hydrous Zirconium Oxide." Journal of Hazardous Materials, vol. 173, no. 1-3, 2010, pp. 630-6.
Rodrigues LA, Maschio LJ, da Silva RE, et al. Adsorption of Cr(VI) from aqueous solution by hydrous zirconium oxide. J Hazard Mater. 2010;173(1-3):630-6.
Rodrigues, L. A., Maschio, L. J., da Silva, R. E., & da Silva, M. L. (2010). Adsorption of Cr(VI) from aqueous solution by hydrous zirconium oxide. Journal of Hazardous Materials, 173(1-3), 630-6. https://doi.org/10.1016/j.jhazmat.2009.08.131
Rodrigues LA, et al. Adsorption of Cr(VI) From Aqueous Solution By Hydrous Zirconium Oxide. J Hazard Mater. 2010 Jan 15;173(1-3):630-6. PubMed PMID: 19748728.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Adsorption of Cr(VI) from aqueous solution by hydrous zirconium oxide. AU - Rodrigues,Liana Alvares, AU - Maschio,Leandro José, AU - da Silva,Rafael Evangelista, AU - da Silva,Maria Lúcia Caetano Pinto, Y1 - 2009/09/01/ PY - 2009/05/12/received PY - 2009/08/27/revised PY - 2009/08/27/accepted PY - 2009/9/15/entrez PY - 2009/9/15/pubmed PY - 2010/2/19/medline SP - 630 EP - 6 JF - Journal of hazardous materials JO - J Hazard Mater VL - 173 IS - 1-3 N2 - A type of ZrO(2).nH(2)O was synthesized and its Cr(VI) removal potential was investigated in this study. The kinetic study, adsorption isotherm, pH effect, thermodynamic study and desorption were examined in batch experiments. The kinetic process was described by a pseudo-second-order rate model very well. The Cr(VI) adsorption tended to increase with a decrease of pH. The adsorption data fitted well to the Langmuir model. The adsorption capacity increased from 61 to 66 mg g(-1) when the temperature was increased from 298 to 338 K. The positive values of both Delta H degrees and DeltaS degrees suggest an endothermic reaction and increase in randomness at the solid-liquid interface during the adsorption. Delta G degrees values obtained were negative indicating a spontaneous adsorption process. The effective desorption of Cr(VI) on ZrO(2).nH(2)O could be achieved using distilled water at pH 12. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/19748728/Adsorption_of_Cr_VI__from_aqueous_solution_by_hydrous_zirconium_oxide_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(09)01430-7 DB - PRIME DP - Unbound Medicine ER -