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High-rate iron oxidation at below pH 1 and at elevated iron and copper concentrations by a Leptospirillum ferriphilum dominated biofilm

Paper ID Volume ID Publish Year Pages File Format Full-Text
36512 45134 2005 6 PDF Available
Title
High-rate iron oxidation at below pH 1 and at elevated iron and copper concentrations by a Leptospirillum ferriphilum dominated biofilm
Abstract

The influences of H+, Fe2+, Fe3+ and Cu2+ ion concentrations and their different combinations on the iron oxidation by an enrichment culture dominated by Leptospirillum ferriphilum were studied in batch experiments and continuous-flow fluidized-bed reactors. The iron oxidation rate did not significantly vary in the pH range of 0.9–1.5 and was only partially inhibited at pH 0.7. Ferric and ferrous iron at 5 and 24 g L−1, respectively, had little or no effect on iron oxidation by the enrichment culture and the iron oxidation rate slightly decreased at higher concentrations. At a loading rate of 3 g Fe2+ L−1 h−1, 2 g L−1 Cu2+ did not affect the iron oxidation rate, whereas at a loading rate of 10 g Fe2+ L−1 h−1 it reduced the rate by 69%. The maximum iron oxidation rate was 10 g Fe2+ L−1 h−1 at pH 0.9 and in the presence of 21 g L−1 Fe2+ and 2 g L−1 Cu2+.

Keywords
Ferrous iron oxidation; Metal tolerance; Leptospirillum ferriphilum
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High-rate iron oxidation at below pH 1 and at elevated iron and copper concentrations by a Leptospirillum ferriphilum dominated biofilm
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 40, Issue 11, November 2005, Pages 3536–3541
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