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Feasibility of removal of dioxin and dioxin-like PCB's by intensive fishery of herring and sprat in the Baltic Sea

image of Feasibility of removal of dioxin and dioxin-like PCB's by intensive fishery of herring and sprat in the Baltic Sea

In this report it is discussed and assessed whether it is feasible to reduce dioxin content of herring and sprat in the Baltic Sea by a period of intensified fishery in the region and if intensified fishery causes adverse environmental effects or affects the stocks of other species like cod, salmon and other pelagic species. The background is the present problems complying with the European Commission limit values for dioxins and dioxin-like PCBs in Fish from the Baltic Sea. Also flame retardants and other hazardous substances present an increasing quality problem for the fisheries sector.

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Budget for dioxin and dioxin like PCBs in the Baltic Sea

Dioxins enter the Baltic Sea as air fallout when transported from landbased sources and via the multitude of waterways. To a large extent in the past waterway pollution could be attributed to some chemical and forest industries, where chlorine was used in large amounts for pulp bleaching until the early 1990s. This has now stopped in Finland and Sweden but chlorine gas is still used in some Russian pulp and paper mills. Other water pollution sources include releases from coke plants and municipal waste waters. Natural events or processes such as forest or steppe fires and volcanic eruptions can also cause dioxin emissions. Apart from the current known sources and historical emissions there are also isolated incidents such as accidental emissions and building fires, which can release significant dioxin or furan emissions into the atmosphere (HELCOM, 2004).

English

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