| 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 |
