Bioaccumulation of hydrophobic xenobiotics via gill and gut
- SFU, Burnaby, British Columbia (Canada). Dept. of Biological Science
The authors demonstrated that the uptake of three hydrophobic chemicals, 1,2,4-trichlorobenzene (TCB), 1,2,3,4,5-pentachlorobenzene (PeCB), and 2,2{prime},4,4{prime},6,6{prime}-hexachlorobiphenyl (HCB), from water laden with sediments from the Fraser River was just as rapid and to at least the same level in juvenile rainbow trout with pharynx blocked as compared with control, unfed fish. Furthermore, a chemical mass balance analysis revealed that the quantity of PECB and HCB dissolved in water could not account by itself for the quantity of these compounds that had appeared in the fish after 6 days of exposure. Thus, the authors conclude that hydrophobic chemicals such as these with log K{sub ow} values of 5--7 are bioavailable for gill uptake from water laden with sediments from the Fraser River. In a separate experiment, the appearance of TCB, PeCB and HCB in fish eating contaminated food at 2% body mass/day was measured over 12 days. Although the chemical concentrations in the food were 5,000 to 65,000 times higher than the concentrations in the water plus suspended sediments of the earlier experiment, the concentrations of xenobiotics in fish tissues were not significantly higher than in the unfed fish of the earlier experiment. The authors conclude that the bioavailability via the gill of high K{sub ow} compounds from Fraser River sediments is very significant in juvenile rainbow trout. Data also showed that metabolism of TCB, but not PeCB and HCB, was significant.
- OSTI ID:
- 398210
- Report Number(s):
- CONF-9511137-; ISBN 1-880611-03-1; TRN: IM9649%%418
- Resource Relation:
- Conference: 2. Society of Environmental Toxicology and Chemistry (SETAC) world conference, Vancouver (Canada), 5-9 Nov 1995; Other Information: PBD: 1995; Related Information: Is Part Of Second SETAC world congress (16. annual meeting): Abstract book. Global environmental protection: Science, politics, and common sense; PB: 378 p.
- Country of Publication:
- United States
- Language:
- English
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