Record Display for the EPA National Library Catalog


Main Title Influence of Organic Matter Quality on the Toxicity and Partitioning of Sediment-Associated Fluoranthene.
Author DeWitt, T. H. ; Ozretich, R. J. ; Swartz, R. C. ; Lamberson, J. O. ; Schults, D. W. ;
CORP Author Oregon State Univ., Newport. Hatfield Marine Science Center.;Environmental Research Lab.-Narragansett, Newport, OR. Pacific Ecosystems Branch.
Publisher c1992
Year Published 1992
Report Number EPA-68-C0-0051; EPA/600/J-93/140 ; ERLN-N126
Stock Number PB93-185874
Additional Subjects Condensed aromatics ; Water pollution effects(Animals) ; Crustacea ; Toxicity ; Separation ; Organic materials ; Sediments ; Substrates ; Reprints ; Fluoranthene ; Rhepoxynius abronius ; Amphipods
Library Call Number Additional Info Location Last
NTIS  PB93-185874 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 14p
Organic matter in sediment is derived from many sources, including dead plants and animals, fecal matter, and flocculated colloidal organic matter. Chemical partitioning and toxicity of nonpolar organic contaminants is strongly affected by the quantity of sediment organic matter. The purpose of the study was to determine whether the quality of sediment organic matter affects partitioning and bioavailability of such contaminants. A base substrate, amended to a consistent organic carbon level (nominally 0.4%, measured 0.35% + or - 0.11 sd POC (particulate organic carbon)) with five types of organic matter (a macrophyte, fecal matter of two invertebrate species, suspended particulate organic matter, and an organic-rich mud), was spiked with serial concentrations of the polynuclear aromatic hydrocarbon, fluoranthene. After a five-week equilibration period, the toxicity of the spiked substrates to an infaunal amphipod, Rhepoxynius abronius, was measured, and the distribution of fluoranthene between particulate and interstitial water phases (including total and freely dissolved interstitial water phases) was determined.