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Isolation, identification and characterization of a Hypocrea tawa strain with high Cr(VI) reduction potential

Paper ID Volume ID Publish Year Pages File Format Full-Text
4391 224 2008 9 PDF Available
Title
Isolation, identification and characterization of a Hypocrea tawa strain with high Cr(VI) reduction potential
Abstract

A fungal strain that exhibits high Cr(VI) reduction potential was isolated from surface water by enrichment culture techniques. The isolated fungus was identified as Hypocrea tawa by the D1/D2 domain sequence of its 26S rRNA gene. The Cr(VI) reduction process catalyzed by H. tawa was characterized in batch cultures conducted at initial Cr(VI) concentrations ranging from 0.59 to 4.13 mM. The fungus showed a remarkable capacity to completely reduce very high concentrations of Cr(VI) (4.13 mM) under aerobic conditions. Higher volumetric (1.75 mg Cr(VI)/L h) and specific rates (0.67 mg Cr(VI)/g biomass h) as well as a greater capacity (77 mg Cr(VI)/g biomass) to reduce Cr(VI) were obtained with higher initial Cr(VI) concentrations (4.13 mM), which suggests that the fungal strain could be potentially useful for detoxification of Cr(VI)-laden wastewaters.

Keywords
Bioremediation; Fungi; Hexavalent chromium (Cr(VI)); Hypocrea tawa; Kinetics; Cr(VI) reduction
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 40, Issue 2, 1 June 2008, Pages 284–292
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
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