Distribution of Organic Contaminants in Water and Suspended Solids of the Rainy River

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Abstract
Water and suspended solid samples were collected in 1986 at three stations on the Rainy River and from the final effluents of two bleached kraft pulp and paper mills discharging into the river. A wide range of organic contaminants were analysed, including organochlorine pesticides (OCs), total PCBs, chlorobenzenes (CBs), polycyclic aromatic hydrocarbons (PAHs) and chlorophenols (CPs). Suspended solids were also analysed for dioxins and furans. Analysis of the data indicated that for the most part, compounds were below the detection limit at the upstream end of the river. High levels of PCBs, dioxins, furans, CPs and PAHs were found in mill effluents, which resulted in some elevated concentrations in the Rainy River downstream of the mills. At the downstream end of the river, there was no impact evident for the compounds analysed.

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