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PCB CONGENERS AND HEXACHLOROBENZENE BIOTA SEDIMENT ACCUMULATING FACTORS FOR MACOMA NASUTA EXPOSED TO SEDIMENTS WITH DIFFERENT TOTAL ORGANIC CARBON CONTENTS
Citation:
Boese, B., M. Winsor, H. II, S. Echols, J. Pelletier, AND R. Randall. PCB CONGENERS AND HEXACHLOROBENZENE BIOTA SEDIMENT ACCUMULATING FACTORS FOR MACOMA NASUTA EXPOSED TO SEDIMENTS WITH DIFFERENT TOTAL ORGANIC CARBON CONTENTS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-95/282.
Description:
Deposit-feeding marine clams (Macoma nasuta) were exposed for 119d to three sediment types that varied in total organic carbon (TOC) from 0.8 to 2.5%. ediments were spiked with equal concentrations of 13 polychlorinated biphenyl congeners and hexachlorobenzene. issue residues were measured, and steady-state bioaccumulation factors (BAFS), the corresponding lipid, and TOC-normalized biota sediment accumulation factors (BSAFS) were determined. he BSAFs were less variable than were the BAFs with the exception of compounds with log Kow >7. any of the BSAFs exceeded 1.7, which is a calculated maximum value based on partitioning alone. lthough BSAFs varied with sediment type and compound, the use of a BSAF of 4 as a screening level for neutral organic compounds in assessing dredge materials is supported by the present study.