The use of aquatic bioconcentration factors in ecological risk assessments: Confounding issues, laboratory v/s modeled results
Conference
·
OSTI ID:442876
- Pacific Northwest National Lab., Richland, WA (United States)
Bioconcentration in aquatic systems is generally taken to refer to contaminant uptake through non-ingestion pathways (i.e., dermal and respiration uptake). Ecological risk assessments performed on aquatic systems often rely on published data on bioconcentration factors to calibrate models of exposure. However, many published BCFs, especially those from in situ studies, are confounded by uptake from ingestion of prey. As part of exposure assessment and risk analysis of the Columbia River`s Hanford Reach, the authors tested a methodology to estimate radionuclide BCFs for several aquatic species in the Hanford Reach of the Columbia River. The iterative methodology solves for BCFs from known body burdens and environmental media concentrations. This paper provides BCF methodology description comparisons of BCF from literature and modeled values and how they were used in the exposure assessment and risk analysis of the Columbia River`s Hanford Reach.
- OSTI ID:
- 442876
- Report Number(s):
- CONF-961149--
- Country of Publication:
- United States
- Language:
- English
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