Abstract

In an investigation of organochlorine levels in sediments from the North Sea, most organochlorine pesticides as well as polychlorinated biphenyls (PCB) showed highest sediment contamination levels close to the German, Dutch, and British coasts that decreased towards the open sea, but elevated hexachlorobenzene (HCB) concentrations were found in the sediments of the international ocean combustion area in the centre of the southern North Sea and were accompanied by exceptionally high levels of octachlorostyrene (OCS). It is suggested that both HCB and OCS enter the North Sea ecosystem as products of incomplete combustion from ocean incineration.

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