Record Display for the EPA National Library Catalog


Main Title Sorption of Hydrophobic Pollutants on Natural Sediments.
Author Karickhoff, Samuel W. ; Brown, David S. ; Scott, Trudy A. ;
CORP Author Environmental Research Lab., Athens, GA.
Year Published 1978
Report Number EPA/600/J-79/005;
Stock Number PB-294 857
Additional Subjects Hydrocarbons ; Chlorine organic compounds ; Sediments ; Concentration(Composition) ; Ponds ; Rivers ; Sorption ; Chemical analysis ; Laboratory equipment ; Water pollution ; Sediment-water interfaces ; Water pollution detection ; Reprints
Library Call Number Additional Info Location Last
NTIS  PB-294 857 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 10p
The sorption of hydrophobic compounds (aromatic hydrocarbons and chlorinated hydrocarbons) spanning a concentration range in water solubility from 500 parts per trillion (ppt) to 1800 parts per million (ppm) on local (North Georgia) pond and river sediments was investigated. The sorption isotherms were linear over a broad range of aqueous phase pollutant concentrations. The linear partition coefficients (K(p)) were relatively independent of sediment concentrations and ionic strength in the suspensions. The K(p)'s were directly related to organic carbon content for given particle size isolates in the different sediments. On an organic carbon basis (K(oc)=K(p)/fraction organic carbon), the sand fraction (> 50 micrometers particle size) was a considerable less effective sorbent (50-90% reduction in K(oc)) than the fines fraction (< 50 micrometers particles). Differences in sorption within the silt and clay fractions were largely related to differences in organic carbon content. Reasonable estimates of K(oc)'s can be made from octanol/water distribution coefficients, which are widely catalogue or easily measured in the laboratory.