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Cr(VI) reduction by Bacillus sp. isolated from chromium landfill

Paper ID Volume ID Publish Year Pages File Format Full-Text
36048 45119 1986 6 PDF Available
Title
Cr(VI) reduction by Bacillus sp. isolated from chromium landfill
Abstract

Five chromate-reducing strains were isolated from the chromium landfill and two of them, XW-2 and XW-4 were identified as Bacillus sp. The strain of XW-4 was selected to study the resistance to Cr(VI) and its ability to reduce Cr(VI). The strain was found to tolerate Cr(VI) concentration as high as 100 mg/l, but the cells growth was affected by the presence of Cr(VI), especially at the concentration of 100 mg/l. The experiments also demonstrated that toxic Cr(VI) was reduced effectively into comparatively less toxic Cr(III) by the strain of Bacillus sp., XW-4, and bacterial Cr(VI) reduction was enhanced significantly by addition of glucose. The optimum initial pH for Cr(VI) reduction was 9 and final pH value of 5–6 was observed for initial pH 4–10. The cells reduced Cr(VI) more efficiently at 37 °C, compared with that at 20 and 47 °C. Within the same incubation time, more amount of Cr(VI) was reduced at higher initial Cr(VI) concentration ranging from 10 to 80 mg/l. Bacterial Cr(VI) reduction was not influenced by NO3− and SO42−.

Keywords
Bacillus sp.; Bioremediation; Cr(VI) reduction; Cr(III)
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Cr(VI) reduction by Bacillus sp. isolated from chromium landfill
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 41, Issue 9, September 2006, Pages 1981–1986
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
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us