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RECORD NUMBER: 303 OF 1578

OLS Field Name OLS Field Data
Main Title Comparison of Aqueous and Solid-Phase Uptake for Hexachlorobenzene in the Tellinid Clam Macoma nasuta (Conrad): A Mass Balance Approach.
Author Boese, B. L. ; Lee, H. ; Specht, D. T. ; Randall, R. C. ; Winsor., M. H. ;
CORP Author Environmental Research Lab.-Narragansett, Newport, OR. Mark O. Hatfield Marine Science Center.
Publisher c1990
Year Published 1990
Report Number EPA/600/J-90/071 ;ERLN-N053;
Stock Number PB90-245564
Additional Subjects Clams ; Toxicology ; Comparison ; Ventilation ; Sediments ; Water pollution ; Feces ; Tissues(Biology) ; Reprints ; Macoma nasuta ; Hexachlorobenzenes ; Pharmacokinetics ; Gills ; Biological availability ; Environmental exposure pathways
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB90-245564 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 12/03/1990
Collation 13p
Abstract
The uptake of sediment-associated hexachlorobenzene (HCB) by the deposit-feeding clam Macoma nasuta (Conrad) was determined using a clam ventilation chamber. Clams were exposed to ((14)C)HCB-dosed sediment, and the (14)C amounts were measured in inhalant and exhalant waters, fecal pellets and soft tissues. The volume of water the clam ventilated and the amount of fecal pellets produced were measured. The contributions of 10 possible uptake routes to HCB tissue residues were estimated using a bioenergetic-based bioaccumulation model. Mass balance results indicate that uptake of HCB by the gut from ingested solids was the single most important route, accounting for 63 to 84% of HCB tissue residues. The next largest route was uptake from interstitial water ventilated across the gills, which accounted for 11 to 12% of tissue residues. Uptake of HCB from overlying water was minimal. These results indicate that sediment-bound HCB is bioavailable to benthic deposit feeders such as Macoma and supports the contention that ingested sediment is an important uptake route for highly lipophilic pollutants.