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Chromium(VI) adsorption from aqueous solution by Hevea Brasilinesis sawdust activated carbon.
J Hazard Mater. 2005 Sep 30; 124(1-3):192-9.JH

Abstract

Adsorption capacity of Cr(VI) onto Hevea Brasilinesis (Rubber wood) sawdust activated carbon was investigated in a batch system by considering the effects of various parameters like contact time, initial concentration, pH and temperature. Cr(VI) removal is pH dependent and found to be maximum at pH 2.0. Increases in adsorption capacity with increase in temperature indicate that the adsorption reaction is endothermic. Based on this study, the thermodynamic parameters like standard Gibb's free energy (DeltaG degrees), standard enthalpy (DeltaH degrees) and standard entropy (DeltaS degrees) were evaluated. Adsorption kinetics of Cr(VI) ions onto rubber wood sawdust activated carbon were analyzed by pseudo first-order and pseudo second-order models. Pseudo second-order model was found to explain the kinetics of Cr(VI) adsorption most effectively. Intraparticle diffusion studies at different temperatures show that the mechanism of adsorption is mainly dependent on diffusion. The rate of intraparticle diffusion, film diffusion coefficient and pore diffusion coefficient at various temperatures were evaluated. The Langmuir, Freundlich and Temkin isotherm were used to describe the adsorption equilibrium studies of rubber wood sawdust activated carbon at different temperatures. Langmuir isotherm shows better fit than Freundlich and Temkin isotherm in the temperature range studied. The result shows that the rubber wood sawdust activated carbon can be efficiently used for the treatment of wastewaters containing chromium as a low cost alternative compared to commercial activated carbon and other adsorbents reported.

Authors+Show Affiliations

Department of Chemical Engineering, Alagappa College of Technology, Anna University, Sardar Patel Road, Chennai 600 025, India.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Evaluation Study
Journal Article

Language

eng

PubMed ID

15927367

Citation

Karthikeyan, T, et al. "Chromium(VI) Adsorption From Aqueous Solution By Hevea Brasilinesis Sawdust Activated Carbon." Journal of Hazardous Materials, vol. 124, no. 1-3, 2005, pp. 192-9.
Karthikeyan T, Rajgopal S, Miranda LR. Chromium(VI) adsorption from aqueous solution by Hevea Brasilinesis sawdust activated carbon. J Hazard Mater. 2005;124(1-3):192-9.
Karthikeyan, T., Rajgopal, S., & Miranda, L. R. (2005). Chromium(VI) adsorption from aqueous solution by Hevea Brasilinesis sawdust activated carbon. Journal of Hazardous Materials, 124(1-3), 192-9.
Karthikeyan T, Rajgopal S, Miranda LR. Chromium(VI) Adsorption From Aqueous Solution By Hevea Brasilinesis Sawdust Activated Carbon. J Hazard Mater. 2005 Sep 30;124(1-3):192-9. PubMed PMID: 15927367.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Chromium(VI) adsorption from aqueous solution by Hevea Brasilinesis sawdust activated carbon. AU - Karthikeyan,T, AU - Rajgopal,S, AU - Miranda,Lima Rose, PY - 2005/02/04/received PY - 2005/04/26/revised PY - 2005/05/04/accepted PY - 2005/6/2/pubmed PY - 2006/1/18/medline PY - 2005/6/2/entrez SP - 192 EP - 9 JF - Journal of hazardous materials JO - J Hazard Mater VL - 124 IS - 1-3 N2 - Adsorption capacity of Cr(VI) onto Hevea Brasilinesis (Rubber wood) sawdust activated carbon was investigated in a batch system by considering the effects of various parameters like contact time, initial concentration, pH and temperature. Cr(VI) removal is pH dependent and found to be maximum at pH 2.0. Increases in adsorption capacity with increase in temperature indicate that the adsorption reaction is endothermic. Based on this study, the thermodynamic parameters like standard Gibb's free energy (DeltaG degrees), standard enthalpy (DeltaH degrees) and standard entropy (DeltaS degrees) were evaluated. Adsorption kinetics of Cr(VI) ions onto rubber wood sawdust activated carbon were analyzed by pseudo first-order and pseudo second-order models. Pseudo second-order model was found to explain the kinetics of Cr(VI) adsorption most effectively. Intraparticle diffusion studies at different temperatures show that the mechanism of adsorption is mainly dependent on diffusion. The rate of intraparticle diffusion, film diffusion coefficient and pore diffusion coefficient at various temperatures were evaluated. The Langmuir, Freundlich and Temkin isotherm were used to describe the adsorption equilibrium studies of rubber wood sawdust activated carbon at different temperatures. Langmuir isotherm shows better fit than Freundlich and Temkin isotherm in the temperature range studied. The result shows that the rubber wood sawdust activated carbon can be efficiently used for the treatment of wastewaters containing chromium as a low cost alternative compared to commercial activated carbon and other adsorbents reported. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/15927367/Chromium_VI__adsorption_from_aqueous_solution_by_Hevea_Brasilinesis_sawdust_activated_carbon_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(05)00208-6 DB - PRIME DP - Unbound Medicine ER -