Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Decomposition by Planktonic and Attached Microorganisms Improves Chemical Fate Models.
Author Lassiter, R. R. ; Parrish, R. S. ; Burns, L. A. ;
CORP Author Environmental Research Lab., Athens, GA. ;Computer Sciences Corp., Athens, GA.
Year Published 1986
Report Number EPA/600/J-86/012;
Stock Number PB86-177805
Additional Subjects Microorganisms ; Aquatic biology ; Organic compounds ; Water pollution ; Decomposition ; Sediment transport ; Mathematical models ; Environments ; Model tests ; Plankton ; Insecticides ; Phosphorus organic compounds ; Sulfur organic compounds ; Reprints ; Aufwuchs ; Path of pollutants ; Methyl parathion
Library Call Number Additional Info Location Last
NTIS  PB86-177805 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 13p
Terms for decomposition by both suspended and attached microorganisms were included in a model to calculate the fate of chemicals in aquatic systems. The model differs from previous models primarily by the inclusion of a term for decomposition by aufwuchs in addition to a term for decomposition by planktonic microorganisms. Decomposition by aufwuchs is represented as occurring at a rate limited by the serial processes of transport to a planar surface and decomposition at the surface. Two sets of experiments were conducted using replicate laboratory microcosms, each maintained with six different environments. Included in these parameters were the rate coefficients for the two microbial decomposition terms. With both microbial decomposition terms included, the fate model accounted satisfactorily for observed methyl parathion concentration using only a single, environment-independent rate coefficient for each term.