Abstract
AbstractIn tests conducted for the Canadian government on sediment from Thunder Bay Harbour, Ontario, the BioGenesis washing process was demonstrated to be effective in remediating contaminated harbor sediments. Removal efficiencies for 16 polyaromatic hydrocarbons (PAHs) in concentrations exceeding 4,000 parts per million averaged 90 to 95 percent in pilot tests. These results are significant because, until now, washing processes have not proven effective in cleaning the small‐size particles of silt and clay that make up most underwater sediments. In Thunder Bay, 81 percent of the particles were less than 38 microns (medium silt) in size. The tests on Thunder Bay sediment were conducted under the auspices of the Contaminated Sediment Treatment Technology Program of Environment Canada's Wastewater Technology Centre. Thunder Bay Harbour is one of 43 “areas of concern” identified by the International Joint Commission of Great Lakes Water Quality.
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