Main Title |
Physical and Chemical Factors That Influence the Anaerobic Degradation of Methyl Parathion in Sediment Systems. |
Author |
Wolfe, N. L. ;
Kitchens, B. E. ;
Macalady, D. L. ;
Grundl, T. J. ;
|
CORP Author |
Environmental Research Lab., Athens, GA. ;Colorado School of Mines, Golden. Dept. of Chemistry and Geochemistry. |
Year Published |
1986 |
Report Number |
EPA/600/J-86/301; |
Stock Number |
PB87-175659 |
Additional Subjects |
Anaerobic processes ;
Degradation ;
Sediments ;
Pesticides ;
Kinetics ;
Oxidation reduction reactions ;
Reprints ;
Methyl parathion ;
Phosphorothioate/o-o-(dimethyl)-o-p-(nitrophenyl) ;
Aquatic ecosystems
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB87-175659 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
10p |
Abstract |
The kinetics of disappearance of methyl parathion (0,0-dimethyl-0-p-nitrophenyl phosphorothioate) were studied in anaerobic sediment samples in the laboratory as a function of methyl parathion concentration, pH, and Eh. The disappearance of methyl parathion is described by first-order kinetics and amino methyl parathion (0,0-dimethyl-0-p-aminophenyl phosphorothioate) was identified as a reduction product. In the strongly reducing sediments, the half-lives were on the order of a few minutes. In water isolated from the sediment, no reaction could be detected over the period of a week. Also, there is no apparent correlation between the first-order disappearance rate constants and the pH of the sediment samples. In heat-sterilized sediments, the disappearance rate constants are retarded about two orders of magnitude relative to nonsterile sediments. In chemically treated sediments, first-order disappearance rate constants are comparable to those in the nonsterile system. (Copyright (c) Pergamon Journals Ltd., 1986.) |
Supplementary Notes |
Pub. in Environmental Toxicology and Chemistry 5(12), p1019-1026 Dec 86. Prepared in cooperation with Colorado School of Mines, Golden. Dept. of Chemistry and Geochemistry. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Physical and Chemical Factors That Influence the Anaerobic Degradation of Methyl Parathion in Sediment Systems. |
PUB Date Free Form |
c1986 |
Category Codes |
68E; 99A |
NTIS Prices |
PC A02/MF A01 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
718320304 |
Origin |
NTIS |
Type |
CAT |