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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Screening for soil toxicity and mutagenicity using luminescent bacteria--a case study of the explosive 2,4,6-trinitrotoluene (TNT).
Ecotoxicology and Environmental Safety 2002 Februrary
The presented study explored the suitability of aquatic bioassays based on the marine luminescent bacterium Vibrio fischeri as screening indicators for soil toxicity and mutagenicity. The study consists of two parts: (i) determination of the bacterial toxicity and mutagenicity of the single substance 2,4,6-trinitrotoluene (TNT) and its primary reduced metabolites using three different luminescent bacteria assays and (ii) determination of the water-extractable toxicity and mutagenicity of soil samples taken at a former production plant for TNT showing complex contamination (TNT, metabolites of TNT, PAHs, and heavy metals). Resulting data indicate TNT to be predominantly responsible for the observed biological effects of soil leachates. A strategy for soil toxicity screening based on luminescent bacteria is proposed which may especially be applicable for the case of bioremediation of TNT-contaminated soils. Potentials and restrictions of this approach to soil toxicity assessment are discussed.
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