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Electronic Journal of Biotechnology
Universidad Católica de Valparaíso
ISSN: 0717-3458
Vol. 10, No. 3, 2007, pp. 358-367
Bioline Code: ej07034
Full paper language: English
Document type: Research Article
Document available free of charge

Electronic Journal of Biotechnology, Vol. 10, No. 3, 2007, pp. 358-367

 en Biosorption of hexavalent chromium using tamarind ( Tamarindus indica check for this species in other resources ) fruit shell-a comparative study
Popuri, Srinivasa Rao; Jammala, Ajithapriya; Reddy, Kachireddy Venkata Naga Suresh & Abburi, Krishnaiah


The adsorption of chromium (VI) ions from aqueous solutions has been investigated on crude tamarind fruit shell, HCl treated and Oxalic acid treated shells at room temperatures. The biosorbents are characterized by FT-IR, EDXRF and porosimetry. The biosorption experiments are conducted through batch system. The influence of different experimental parameters such as pH, effect of initial metal ion concentration and effect of dosage of adsorbent on biosorption are evaluated. The adsorption followed first order kinetics. The data are fitted well to Langmuir and Freundlich isotherm models. A comparison is drawn on the extent of biosorption between untreated and treated forms of the tamarind shells. Due to their outstanding adsorption capacities, tamarind shells are excellent sorbents for the removal of chromium ions.

biosorption, chromium (VI), pre-treatment, Tamarindus indica fruit shell.

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