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RECORD NUMBER: 187 OF 436Main Title | Initial Test of the Benchmark Chemical Approach for Predicting Microbial Transformation Rates in Aquatic Environments. | |||||||||||
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Author | Newton, T. D. ; Gattie, D. K. ; Lewis, D. L. ; | |||||||||||
CORP Author | Technology Applications, Inc., Athens, GA.;Environmental Research Lab., Athens, GA. | |||||||||||
Publisher | c1990 | |||||||||||
Year Published | 1990 | |||||||||||
Report Number | EPA/600/J-90/003; | |||||||||||
Stock Number | PB90-219643 | |||||||||||
Additional Subjects | Microorganisms ; Reaction kinetics ; Biodeterioration ; Environmental surveys ; Water pollution ; Chemical compounds ; Field tests ; Experimental design ; Sampling ; Sediments ; Films ; Microbiology ; Reprints ; Benchmarks ; Environmental persistence ; Biochemical reaction kinetics ; Acetic acid/(methyl-ester)-dichlorophenoxy ; Technology utilization ; Floating mats ; Biological effects ; Biological indicators ; Benzoic acid/(methyl-ester)-chloro ; Parathion/methyl ; Acetic acid/(butoxyethyl-ester)-dichlorophenoxy | |||||||||||
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Collation | 6p | |||||||||||
Abstract | Using 2,4-dichlorophenoxyacetic acid methyl ester (2,4-DME) as a benchmark chemical, the authors determined relative pseudo-first-order rate coefficients for butoxyethyl ester of 2,4-dichlorophenoxyacetic acid (2,4-DBE), methyl parathion, and methyl-3-chlorobenzoate in a diversity of microbial samples, including water, sediment, biofilm, and floating microbial mats collected from a laboratory mesocosm as well as from streams, lakes, and wetlands in Georgia and Florida. The decreasing order of reactivity for relative microbial transformation rates was 2,4-DBE>2,4-DME>methyl-3-chlorobenzene>methyl parathion. Half-lives of the chemicals varied about 60-fold depending on the chemical and microbial sample. Relative rate coefficients, however, typically varied only about threefold for field-collected samples. Relative rate coefficients determined with samples from a laboratory mesocosm were consistently low compared with the field sample data. Overall, the data indicated that microbial transformation rates of a chemical can be satisfactorily inferred for a wide variety of microbial habitats--such as water, biofilm, or a sediment--on the basis of its transformation rate relative to that of an appropriate benchmark chemical by using a single type of microbial sample. (Copyright (c) 1990, American Society for Microbiology.) | |||||||||||
Supplementary Notes | Pub. in Applied and Environmental Microbiology, v56 n1 p288-291 Jan 90. Sponsored by Environmental Research Lab., Athens, GA. | |||||||||||
NTIS Title Notes | Journal article. | |||||||||||
Title Annotations | Reprint: Initial Test of the Benchmark Chemical Approach for Predicting Microbial Transformation Rates in Aquatic Environments. | |||||||||||
Category Codes | 68D; 57K; 57B; 99F | |||||||||||
NTIS Prices | PC A02/MF A01 | |||||||||||
Primary Description | 600/01 | |||||||||||
Document Type | NT | |||||||||||
Cataloging Source | NTIS/MT | |||||||||||
Control Number | 019412431 | |||||||||||
Origin | NTIS | |||||||||||
Type | CAT |