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Removal of hexavalent chromium using coffee husk

Ahalya, N and Kanamadi, RD and Ramachandra, TV (2010) Removal of hexavalent chromium using coffee husk. In: International Journal of Environment and Pollution, 43 (1-3). pp. 106-116.

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Abstract

The potential to remove chromium(VI) from aqueous solutions through biosorption using coffee husk was investigated. The effects of pH, contact time, initial concentration and adsorbent dosage on the adsorption of Cr(VI) were studied. The data obeyed Langmuir and Freundlich adsorption isotherms. The Langmuir adsorption capacity was found to be 44.95 mg/g. The Freundlich constants K-f and n were 1.027 mg/g (litre/mg)(n)] and 1.493, respectively. Desorption studies indicated the removal of 60% of the hexavalent chromium. Infrared spectral studies revealed the presence of functional groups, such as hydroxyl and carboxyl groups, on the surface of the biomass, which facilitates biosorption of Cr(VI).

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Inderscience Publishers.
Keywords: chromium(VI); coffee husk; low-cost biosorbent; adsorption; infrared analysis
Department/Centre: Division of Biological Sciences > Centre for Ecological Sciences
Division of Mechanical Sciences > Centre for Sustainable Technologies (formerly ASTRA)
Date Deposited: 21 Dec 2010 10:50
Last Modified: 21 Dec 2010 10:56
URI: http://eprints.iisc.ernet.in/id/eprint/34569

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