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Applied and Environmental Microbiology logoLink to Applied and Environmental Microbiology
. 1996 Nov;62(11):4108–4113. doi: 10.1128/aem.62.11.4108-4113.1996

A freshwater anaerobe coupling acetate oxidation to tetrachloroethylene dehalogenation.

L R Krumholz 1, R Sharp 1, S S Fishbain 1
PMCID: PMC168232  PMID: 8900001

Abstract

Strain TT4B has been isolated from anaerobic sediments known to be contaminated with a variety of organic solvents. It is a gram-negative, rod-shaped bacterium and grew anaerobically with acetate as the electron donor and tetrachloroethylene as the electron acceptor in a mineral medium. cis-Dichloroethylene was the halogenated product. This strain did not grow fermentatively and used only acetate or pyruvate as electron donors. Tetrachloroethylene and trichloroethylene were used as electron acceptors, as were ferric nitriloacetate and fumarate. Nitrogen and sulfur oxyanions were not able to substitute as the electron acceptor for this organism. Modest growth occurred in a two-phase system with 1 ml of hexadecane containing 50 to 200 mM tetrachloroethylene (aqueous concentrations, 25 to 100 microM) and 10 ml of anaerobic mineral solution with Na2S as the reducing agent. Growth was completely inhibited at tetrachloroethylene levels above 100 microM.

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Selected References

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