Use of a Bioassay to Evaluate the Bioaccumulation of Contaminants by Animals Colonizing a Wetland Created with Contaminated Dredged Material,
HOOFDGROEP MAATSCHAPPELIJKE TECHNOLOGIE TNO DELFT (NETHERLANDS)
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At Times Beach, Buffalo, N.Y., a prolific wildlife habitat has developed on a confined dredged material disposal facility. During 1983 studies were conducted to evaluate the availability of contaminants from the dredged material substrate to the animal community. The earthworm Eisenia foetida was used in growth chamber and field bioassay tests. After 28 days exposure the earthworms were harvested and analyzed for heavy metals, polyaromatic hydrocarbons PAHs and polychlorinated biphenyls PCBs. Additionally, naturally occuring earthworms were collected from both the Times Beach site, and a reference site, and analyzed. The chemical analyses indicated significant accumulations of heavy metals, notably Cd and As PCBs and PAHs by the test and naturally occuring earthworms. The results of these studies were related to previously conducted plant bioassay and water quality studies at the site.
- Solid Wastes and Pollution and Control