Record Display for the EPA National Library Catalog

RECORD NUMBER: 203 OF 293

OLS Field Name OLS Field Data
Main Title Sorption Dynamics of Hydrophobic Pollutants in Sediment Suspensions.
Author Karickhoff, S. W. ; Morris, K. R. ;
CORP Author Environmental Research Lab., Athens, GA.
Year Published 1985
Report Number EPA/600/J-85/142;
Stock Number PB86-101193
Additional Subjects Sediments ; Sorption ; Water pollution ; Suspended sediments ; Organic compounds ; Chemical equilibrium ; Mathematical models ; Extraction ; Kinetics ; Recovery ; Concentration(Composition) ; Marine biology ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB86-101193 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 14p
Abstract
Sorption of hydrophobic organic chemicals in natural sediment suspensions was found to frequently require extended time periods (days to weeks) for complete equilibrium. Sorption dynamics could be described by a two-compartment model that distinguished a rapid or 'labile' exchange(requiring at most a few hours to achieve) from highly retarded or 'nonlabile' sorption requiring days or weeks to occur. For highly hydrophobic chemicals and high solid concentrations, the labile fraction decreased to 0.1 or less in some systems. The kinetic exchange constant for nonlabile sorption varied inversely with the sorption equilibrium constant. An understanding of sorption dynamics is important in describing the fate of highly sorbed pollutants in aquatic systems.