Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 333892
Title Hydrogen treshold concentrations in pure cultures of halorespiring bacteria and at a site polluted with chlorinated ethenes
Author(s) Luijten, M.L.G.C.; Roelofsen, W.; Langenhoff, A.A.M.; Schraa, G.; Stams, A.J.M.
Source Environmental Microbiology 6 (2004)6. - ISSN 1462-2912 - p. 646 - 650.
Department(s) Microbiology
FM Kwaliteit Arbo & Milieu
Publication type Refereed Article in a scientific journal
Publication year 2004
Keyword(s) anaerobic mixed culture - reductive dechlorination - enrichment culture - electron-acceptor - redox processes - vinyl-chloride - tetrachloroethene - dehalogenation - sediments - sulfate
Abstract Halorespiring microorganisms are not only able to oxidize organic electron donors such as formate, acetate, pyruvate and lactate, but also H-2. Because these microorganisms have a high affinity for H-2, this may be the most important electron donor for halorespiration in the environment. We have studied the role of H-2-threshold concentrations in pure halorespiring cultures and compared them with mixed cultures and field data. We have found H-2-threshold values between 0.05 and 0.08 nM for Sulfurospirillum halorespirans, S. multivorans and Dehalobacter restrictus under PCE-reducing and nitrate-reducing conditions. The reduction of PCE and TCE can proceed at H-2 concentrations of below 1 nM at a polluted site. However, for the reduction of lower chlorinated ethenes a higher H-2 concentration is required. This indicates that the measured H-2 concentration in situ can be an indicator of the extent of anaerobic reductive dechlorination.
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