Record Display for the EPA National Library Catalog

RECORD NUMBER: 583 OF 4531

OLS Field Name OLS Field Data
Main Title Effect of Sediment Organic Carbon on Survival of 'Hyalella azteca' Exposed to DDT and Endrin.
Author Nebeker, A. V. ; Schuytema, G. S. ; Griffis, W. L. ; Barbitta, J. A. ; Casey, L. A. ;
CORP Author Corvallis Environmental Research Lab., OR. ;Battelle Pacific Northwest Labs., Richland, WA.
Publisher c1989
Year Published 1989
Report Number EPA/600/J-89/117;
Stock Number PB90-106311
Additional Subjects DDT ; Toxicity ; Residual soils ; Endrin ; Insecticides ; Carbon compounds ; Exposure ; Adsorption ; Water quality ; Graphs(Charts) ; Reprints ; Hyalella azteca
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB90-106311 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 03/10/1990
Collation 16p
Abstract
Sediment toxicity tests were conducted with the freshwater amphipod Hyalella azteca using sediments ranging in total organic carbon (TOC) concentration from 3 to 11% and spiked with either DDT or endrin. While the toxicity in the DDT-spiked sediment decreased with increasing TOC content, the TOC content of the endrin-spiked sediment had little apparent effect on toxicity. The 10-d sediment dry-weight LC50 for DDT was 11.0 microg/g at 3.0% TOC and 49.7 microg/g at 10.5% TOC. The sediment dry weight LC50s for endrin at 3.0 and 11.2% TOC were 4.4 and 6.0 microg/L, respectively. The results are important in evaluating the carbon normalization theory, which assumes that the availability of nonpolar organic compounds is reduced in the presence of higher concentrations of TOC. The differences in adsorption and toxicity between DDT and endrin are presumably related to the smaller carbon (and octanol/water partition coefficients of endrin.