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Use of dead fungal biomass for the detoxification of hexavalent chromium: screening and kinetics

Paper ID Volume ID Publish Year Pages File Format Full-Text
36564 45136 2005 7 PDF Available
Title
Use of dead fungal biomass for the detoxification of hexavalent chromium: screening and kinetics
Abstract

The removal of hexavalent chromium from aqueous solution was carried out in batch experiments using dead biomass of four fungal strains – Aspergillus niger, Rhizopus oryzae, Saccharomyces cerevisiae and Penicillium chrysogenum. All of these dead fungal biomass completely removed Cr(VI) from aqueous solutions, that of R. oryzae being the most effective. Cr(VI) was removed from aqueous solutions by the reduction to Cr(III) when it contacted with the biomass. The removal rate of Cr(VI) increased with a decrease in pH or with increases of Cr(VI) and biomass concentrations. In particular, the removal rate of Cr(VI) was proportional to total chromate concentration [Cr(VI)], and equivalent concentration of organic compounds [OC], suggesting a simple rate equation in a form of d[Cr(VI)]/dt = −k[Cr(VI)][OC]. This model fitted well with the experimental data obtained at pH 2, supporting the mechanism that Cr(VI) is removed via a redox reaction. From the practical view point, the abundant and inexpensive dead fungal biomass could be used for the conversion of toxic Cr(VI) into less toxic or nontoxic Cr(III).

Keywords
Biosorption; Hexavalent chromium; Fungal biomass; Reduction; Kinetics
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Use of dead fungal biomass for the detoxification of hexavalent chromium: screening and kinetics
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 40, Issue 7, June 2005, Pages 2559–2565
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us