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EFFECTS OF STORAGE ON THE TOXICITY OF SEDIMENTS SPIKED WITH FLUORANTHENE TO THE AMPHIPOD, RHEPOXYNIUS ABRONIUS
Citation:
Cole, F A., B L. Boese, R C. Swartz, J O. Lamberson, AND T H. DeWitt. EFFECTS OF STORAGE ON THE TOXICITY OF SEDIMENTS SPIKED WITH FLUORANTHENE TO THE AMPHIPOD, RHEPOXYNIUS ABRONIUS. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 19(3):744-748, (2000).
Description:
To determine the effect of storage on contaminant bioavailability and toxicity, two sediment types, a fine sand and silty sand, were spiked with nine concentrations of fluoranthene (0.0-50 mg/dry kg) then stored at 4?C for up to 170d. Toxicity of the stored sediment was determined eight times during this storage interval using standard 10-d toxicity tests with marine infaunal amphipod Rhepoxynius abronius. The toxicity of fluoranthene in the silty sand was similar for all storage times with LC 50s ranging from 5.3 to 6.6 mg/g organic carbon (OC). The LC 50 in the fine sand was 7.4 mg/g OC after 13 d of storage, ranged from 10.2 to 11.8 mg/g OC during 27 to 83 d of storage and increased to 24.2 and 27.6 mg/g OC after 121 and 170 d of storage, respectively. These data indicate that the toxicity of both the fine and silty sand remained essentially constant during storage from days 27-83. Toxicity tests conducted before and after that period may give misleading results because of disequilibrium or unknown storage effects.