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RECORD NUMBER: 5 OF 210

OLS Field Name OLS Field Data
Main Title Abiotic Hydrolysis of Sorbed Pesticides.
Author Macalady, D. L. ; Wolfe, N. L. ;
CORP Author Colorado School of Mines, Golden.;Environmental Research Lab., Athens, GA.
Year Published 1984
Report Number EPA/600/D-84/240;
Stock Number PB85-106243
Additional Subjects Pesticides ; Hydrolysis ; Sediments ; Water pollution control ; Sorption ; Degradation ; Industrial waste treatment ; Surface water ; Catalysis ; pH ; Reaction kinetics ; Sampling ; Path of pollutants
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB85-106243 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 32p
Abstract
The hydrolysis of pesticides that are sorbed to sterilized natural sediments has been investigated in aqueous systems at acid, neutral and alkaline pH's. The results show that the rate constants of pH independent ('neutral') hydrolyses are the same within experimental uncertainties as the corresponding rate constants for dissolved aqueous phase pesticides. Base-catalyzed rates, on the other hand, are substantially retarded by sorption and acid-catalyzed rates are substantially enhanced. A large body of evidence will be presented that substantiates these conclusions for a variety of pesticide types sorbed to several well-characterized sediments. The significance of the results for the evaluation of the effects of sorption on the degradation of pesticides in waste treatment systems and natural water bodies also will be discussed.