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Aquatic Bioassays in Dredged Material Management

by Richard K. Peddicord, US Army Engineer Waterways, Experiment Station, Environmental, Lab, Vicksburg, MS, USA,



Document Type: Proceeding Paper

Part of: Dredging and Dredged Material Disposal

Abstract:

Dredged material ranges from gravel and coarse sand to fine silts and clays, and may be free of contaminants or highly contaminated with a variety of chemicals from industrial, municipal, and agricultural sources. The release and bioavailability of these contaminants after disposal may be great or small, depending upon the particular contaminant(s), geochemistry of the sediment, and physicochemistry of the disposal site. Optimal environmental management of dredged material requires a strategy for comprehensive identification of specific risks posed by each particular dredged material under various disposal options. Such a strategy is outlined in this paper and its use is illustrated with data from an actual evaluation of potential impacts of aquatic disposal of a harbor sediment.

Subject Headings: Dredged materials | Soil pollution | Pollutants | Material properties | Biological processes | Sediment | Ports and harbors

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