Ecotoxicological evaluation of a bench-scale bioslurry treating explosives-spiked soil

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DOIResolve DOI: http://doi.org/10.1080/10889869991219343
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TypeArticle
Journal titleBioremediation
Volume3
Issue3
Pages233245; # of pages: 13
AbstractThe ecotoxicological effects of four bioslurry reactors treating 2,4,6-trinitotoluene (TNT)- and 1,3,5-trinitro-1,3,5- triazacyclohexane (RDX)-spiked soil were evaluated. A control bioslurry reactor was used to assess the endogenous toxicity of the bioslurry operation conditions. A battery of ecotoxicity tests was used: Microtox, green algae growth inhibition, bacterial genotoxicity and mutagenicity, and earthworm mortality and growth inhibition. Bioslurry soluble and solid phases were separated by centrifugation in order to identify toxicity and possible toxicants associated with each phase. Microtox toxicity values were initially very high in both bioslurry reactors spiked with TNT, in relation with TNT concentration. Initial toxicity was also detected by algal growth inhibition, earthworm lethality, genotoxicity and mutagenicity tests. An endogenous toxicity was detected in the control bioreactor using the Microtox and the SOS Chromotest. The soluble phase of the control bioslurry was genotoxic, suggesting that some potentially genotoxic agents were induced in the bioslurry samples. At the end of the bioremediation treatment, data showed that toxicity was reduced using all of the bioassays, except for earthworm lethality and growth inhibition tests in both RDX-spiked bioslurries. This study demonstrates the usefulness of a battery of toxicity tests to monitor bioremediation processes
Publication date
AffiliationNational Research Council Canada; NRC Biotechnology Research Institute
Peer reviewedNo
NRC number43266
NPARC number3539828
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Record identifiere4fe577f-2caf-476b-940e-4d8ac51d023c
Record created2009-03-01
Record modified2016-05-09
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