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Stimulation of Microbially Mediated Chromate Reduction in Alkaline Soil-Water Systems

Stewart, D.I., Burke, I.T. and Mortimer, R.J.G. (2007) Stimulation of Microbially Mediated Chromate Reduction in Alkaline Soil-Water Systems. Geomicrobiology Journal, 24 (7 & 8). pp. 655-669. ISSN 0149-0451 print / 1521-0529 online

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Abstract

Acetate was added to two closed soil-water systems that are representative of the subsurface environment close to chromium ore processing residue disposal sites; one had a pH of 7.7, the other 9.3. Cr(VI) reduction occurred in both systems as part of a cascade of microbially mediated terminal electron-accepting processes, occurring between nitrate and iron reduction. Cr(VI) and subsequently iron reduction took longer to start and were slower in the more alkaline system. At the point when Cr(VI) reduction was essentially complete, the microbial populations in both systems showed an increase in species closely related to β-proteobacteria that are capable of nitrate reduction.

Item Type: Article
Copyright, Publisher and Additional Information: Taylor & Francis LLC. This is an author produced version of the published paper. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: chromate; biostimulation; contaminated land; nitrate-reduction; iron-reduction; alkaline COPR
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds)
The University of Leeds > Faculty of Engineering (Leeds) > School of Civil Engineering (Leeds)
The University of Leeds > Faculty of Engineering (Leeds) > School of Civil Engineering (Leeds) > Inst for Pathogen Control Engineering (Leeds)
Depositing User: Ms Caroline Wilson
Date Deposited: 21 Oct 2008 17:30
Last Modified: 08 Feb 2013 17:05
Published Version: http://dx.doi.org/10.1080/01490450701758221
Status: Published
Publisher: Taylor & Francis Group
Identification Number: 10.1080/01490450701758221
URI: http://eprints.whiterose.ac.uk/id/eprint/4770

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