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JSIR Vol.66(08) [August 2007] >


Title: Effect of pH on chromium biosorption by chemically treated Saccharomyces
Authors: Parvathi, K
Nagendran, R
Nareshkumar, R
Keywords: Biosorption
Chromium
Saccharomyces cerevisiae
Chemical pretreatment
pH
Issue Date: Aug-2007
Publisher: CSIR
Abstract: The effect of initial pH on biosorption by Saccharomyces cerevisiae of total chromium present in tannery effluent was investigated. Maximum biosorption efficiency was evident at neutral pH with a metal removal efficiency of 99 %. S. cerevisiae was then pretreated with NaOH and HCHO-HCOOH to study the role of proteins and amino acids, respectively, in biosorption. At pH 7, 9 and 11, biomass pretreated with NaOH exhibited significant biosorption as compared to raw biomass and that treated with HCHO-HCOOH. However, trend reversed at pH 2. At pH 4, untreated biomass exhibited maximum chromium sorption, when compared to that treated with NaOH and HCHO-HCOOH.
Page(s): 675-679
ISSN: 0022-4456
Source:JSIR Vol.66(08) [August 2007]

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