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RECORD NUMBER: 404 OF 958

OLS Field Name OLS Field Data
Main Title Equilibrium Partitioning and Bioaccumulation of Sediment-Associated Contaminants by Infaunal Organisms.
Author Lake, J. L. ; Rubinstein, N. I. ; Lee, H. ; Lake, C. A. ; Heltshe., J. ;
CORP Author Environmental Research Lab., Narragansett, RI.;Rhode Island Univ., Kingston. ;Science Applications International Corp., Narragansett, RI.
Publisher c1989
Year Published 1989
Report Number EPA/600/J-90/243 ;ERLN-1030;
Stock Number PB91-116954
Additional Subjects Mathematical models ; Sediments ; Equilibrium ; Concentration(Composition) ; Site surveys ; Lipids ; Food chains ; Exposure ; Statistical analysis ; Reprints ; Bioaccumulation ; Water pollution effects(Animals) ; Aquatic ecosystems ; Partition functions ; Polychlorinated biphenyls ; Aroclor 1254 ; Dredge spoil ; Mollusks ; Polychaetes ; Sediment-water interfaces
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NTIS  PB91-116954 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 03/04/1991
Collation 14p
Abstract
The utility and limits of applicability of a simple equilibrium partitioning model for predicting the maximum concentration of neutral organic compounds which can be accumulated by infaunal organisms exposed to a contaminated sediment were examined. Accumulation factors (AFs) for PCBs, the lipid normalized PCB concentration in organisms divided by the organic carbon normalized PCB concentration in sediments, were measured for PCBs in infaunal mollusks and polychaetes a' field sites with a range of sediment Aroclor (A-1254) and total organic carbon (TOC) concentrations. The average AFs for A-1254 were found to be higher (x = 4.94; range 3.76-7.27) at sites with lower contaminant concentrations (15.0-48.3 micrograms A-1254/g dry sediment) than at more contaminated sites (328-9,200 micrograms/g), where AFs were lower (x = 2.62; range 1.14-5.04). AF data grouped on the basis of sediment A-1254 and TOC concentration differed statistically between, but not within each group. Significant differences in mean AFs were found between some species and between some PCB congeners. When all data were considered, the variability associated with AFs was lower than that found for bioaccumulation factors on a wet weight basis, indicating the utility of lipid and organic carbon normalization.