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QUANTITATIVE ASSESSMENT OF THE EFFECTS OF METALS ON MICROBIAL DEGRADATION OF ORGANIC CHEMICALS
Citation:
Said, W. AND D. Lewis. QUANTITATIVE ASSESSMENT OF THE EFFECTS OF METALS ON MICROBIAL DEGRADATION OF ORGANIC CHEMICALS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-91/217 (NTIS PB92101385).
Description:
Biodegradation inhibition of a benchmark chemical, 2,4-dichloro-phenoxyacetic acid methyl ester (2,4-DME), was used to quantify the inhibitory effects of heavy metals on aerobic microbial degradation rates of organic chemicals. his procedure used lake sediments and aufwuchs (floating mats) collected in the field or from laboratory microcosms. ffects of CuC12, HgC12, ZnC12, Cd(NO3)2, and Cr(NO3)3 at initial concentrations ranging from 0.3 uM to 73 mM (approximately 0.1 to 10,000 mg liter-1) were investigated. n general, such metallic compounds appeared to be considerably more inhibitory to the biodegradation of an organic chemical than high concentrations of microbially toxic compounds studied previously. ffects of various metal concentrations were evaluated.
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QUANTITATIVE ASSESSMENT OF THE EFFECTS OF METALS ON MICROBIAL DEGRADATION OF ORGANIC CHEMICALS