Record Display for the EPA National Library CatalogRECORD NUMBER: 1 OF 12
|Main Title||Cometabolism of Low Concentrations of Propachlor, Alachlor, and Cycloate in Sewage and Lake Water.|
|Author||Novick, N. J. ; Alexander, M. ;|
|CORP Author||Cornell Univ. Agricultural Experiment Station, Ithaca, NY. Dept. of Agronomy.;Environmental Research Lab., Gulf Breeze, FL.|
|Report Number||EPA-R-809735; EPA/600/J-85/078;|
|Additional Subjects||Sewage ; Lakes ; Microorganisms ; Metabolism ; Biochemistry ; Pesticides ; Concentration(Composition) ; Reaction kinetics ; Chlorine organic compounds ; Sulfur organic compounds ; Substrates ; Concentration(Composition) ; Water pollution ; Isotopic labeling ; Chromatographic analysis ; Reprints ; Propachlor ; Lasso ; Ro-Neet ; Acetanilide/chloro-N-isopropyl ; Acetanilide/chloro-diethyl-N-(methoxymethyl) ; Cyclohexane carbamic acid/ethyl-N-ethylthio ; Eutrophication|
Low concentrations of propachlor (2-chloro-N-isopropylacetanilide) and alachlor (2-chlor-2', 6'-diethyl-N-(methoxymethyl)acetanilide) were not mineralized, cycloate (S-ethyl-N-ethylthiocyclohexanecarbamate) was slowly or not mineralized, and aniline and cyclohexylamine were readily mineralized in sewage and lake water. Propachlor, alachlor, and cycloate were extensively metabolized, but the products were organic. Little conversion of propachlor and alachlor was evident in sterilized sewage or lake water. The cometabolism of propachlor was essentially linear with time in lake water and was well fit by zero-order kinetics in short periods and by first-order kinetics in longer periods in sewage. The data indicated that cometabolism of these pesticides takes place at concentrations of synthetic compounds that commonly occur in natural waters.