Record Display for the EPA National Library Catalog

RECORD NUMBER: 1 OF 4

Main Title

Cometabolism of Low Concentrations of Propachlor, Alachlor, and Cycloate in Sewage and Lake Water.

Author

CORP Author

Cornell Univ. Agricultural Experiment Station, Ithaca, NY. Dept. of Agronomy.;Environmental Research Lab., Gulf Breeze, FL.

Year Published

1985

Report Number

EPA-R-809735; EPA/600/J-85/078;

Stock Number

PB85-237691

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

Holdings

Library	Call Number	Additional Info	Location	Last Modified	Checkout Status
NTIS	PB85-237691	Some EPA libraries have a fiche copy filed under the call number shown.		07/26/2022

Collation

Abstract

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.