Comparative studies on the microbial adsorption of heavy metals

Goyal, Nisha and Jain, S.C and Banerjee, U C (2003) Comparative studies on the microbial adsorption of heavy metals. Advances in Environmental Research, 7 (2). pp. 311-319. ISSN 10930191

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Abstract

A process of competitive biosorption of Cr(VI) and Fe(III) ions on Streptococcus equisimilis,Saccharomyces cerevisiae and Aspergillus niger is described and compared to single metal ion adsorption in solution. The ability of these three microorganisms to adsorb metal ions [Cr(VI) and Fe(III)], is shown as a function of metal concentration, pH, temperature, growth medium composition, culture age and contact time with the biosorbents. The effect of addition of an extra energy source in the form of glucose, fructose and sucrose in the adsorption medium is studied for the biosorption of metal ions by microorganisms. Freundlich constants are determined from the Freundlich adsorption isotherms for all the organisms. The adsorbed metals from the sorbents can be regenerated in situ with 0.1 M sodium hydroxide.

Item Type:	Article
Additional Information:	Copyright of this article belongs to Elsevier Science.
Uncontrolled Keywords:	Biosorption; Streptococcus equisimilis; Saccharomyces cerevisiae; Aspergillus niger; Biosorbents; Freundlich constants; Isotherms
Subjects:	Q Science > QR Microbiology
Depositing User:	Dr. K.P.S.Sengar
Date Deposited:	13 Feb 2012 15:19
Last Modified:	08 Jan 2015 09:11
URI:	http://crdd.osdd.net/open/id/eprint/915

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