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Persistent organic pollutants (POPs) in bottom sediments from the Baltic Sea

Sapota G.

Oceanological and Hydrobiological Studies

2006

Vol. 35, No.4

295-306

The aim of this work was to describe the level of pollution due to highly persistent polychlorinated contaminants in sediments from the Polish zone of the Baltic Sea and to identify trends of temporal change. Concentrations of PCBs (7 congeners), DDT and its metabolites, and isomers of HCH and HCB were determined in sediment cores from 0 to 31 cm deep. Sediments were sampled twice at eight stations during the 1996-2005 period. The measurements confirm a decline in levels of POPs pollution in sediments from the southern Baltic Sea.

Decreasing trend of persistent organic pollutants (POPs) in herring from the southern Baltic Sea

Sapota G.

Oceanological and Hydrobiological Studies

2006

Vol. 35, No.1

15-21

The aim of this work was to examine the level of POPs (DDT and its metabolites, isomers of HCH, HCB and PCBs) in pelagic herring (Clupea harengus) caught in the southern Baltic Sea once a year during the period 1998-2003. Historical time trends of POPs from the 1970s to the year 1998 were calculated on the basis of the HELCOM Database. The measurements executed within Integrated Monitoring Programme of the Baltic Sea Environment HELCOM/COMBINE confirm that declines in the levels of PCBs and DDT have occurred in some fish from the Baltic Sea over the past 30 years. In herring muscle PCBs have decreased to about 15% of levels of the early 1970s and DDT to 5% of 1970s levels.