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Metal removal by sulphate-reducing bacteria from natural and constructed wetlands

Webb, J.S., McGinness, S. and Lappin-Scott, H.M. (1998) Metal removal by sulphate-reducing bacteria from natural and constructed wetlands Journal of Applied Microbiology, 84, (2), pp. 240-248. (doi:10.1046/j.1365-2672.1998.00337.x). (PMID:9669876).

Record type: Article

Abstract

The use of wetlands is a promising technology to treat acid mine drainage, yet there is little understanding of the fundamental biological processes involved. They are considered to centre on the complex anaerobic ecology within sediments and involve the removal of metals by sulphate-reducing bacteria (SRB). These bacteria generate hydrogen sulphide and cause precipitation of metals from solution as the insoluble metal sulphide. Sulphate-reducing bacteria have been isolated from natural and constructed wetlands receiving acid mine drainage. Sulphide production by isolates and removal of the metals iron, manganese and zinc were measured, as well as utilization of a range of carbon sources. Marked ecological differences between the wetlands were reflected in population composition of SRB enrichments, and these consortia displayed significant differences in sulphide generation and rates of metal removal from solution. Rates of metal removal did not correlate with sulphide generation in all cultures, suggesting the involvement of other biological mechanisms of metal removal. Differences in substrate utilization have highlighted the need for further investigation of carbon flow and potential carbon sources within constructed wetlands.

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Published date: February 1998

Identifiers

Local EPrints ID: 186845
URI: http://eprints.soton.ac.uk/id/eprint/186845
ISSN: 1364-5072
PURE UUID: e301bb8c-586b-488e-be85-cc2b2cb5b0b9
ORCID for J.S. Webb: ORCID iD orcid.org/0000-0003-2068-8589

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Date deposited: 01 Jun 2011 12:37
Last modified: 18 Jul 2017 11:46

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Contributors

Author: J.S. Webb ORCID iD
Author: S. McGinness
Author: H.M. Lappin-Scott

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