1997/01/01 by Thomas Blanz, Kay‐Christian Emeis, Blanz, Thomas +5
Environmental Science · #Toxic Organic Pollutants Impact #Environmental Science and Water Management #Integrated Water Resources Management
paper · pdf · doi:10.2312/meyniana.1997.49.47
Under the EC sponsored research project ODER (Oder Discharge-Environmental \nResponse) first investigations have been carried out to estimate the chlorinated \nbiphenyls (CB) input into Oderhaff via the Oder river. For this purpose, vertical \nprofiles of CB content and composition were analysed on samples of three \nsediment cores. In two water samples, the content of suspended particulate \nmaterial as weil as the particulate CB content and congener-specific composition \nwere measured. \nIn the Oderhaff the CB concentrations of particulate material were between 700 to \n800 pg/dm3. Significant differences in the composition of the components were \nnot observed. In sediments, CB contents were as high as 17 to 24 ngig dry weight \nin near surface sediment layers. They decreased with increasing sediment depth \nand were below detection limits at 15 to 21 cm depth. Based on the size of the \n49 \naccumulation area and related hydrographic conditions, we estimated an input of \n95 kg into the Oderhaff for the last 65 years since the onset of CB production. \nApplying the present prevailing conditions, we calculated an average transport of \nabout 825 kg CB by the Oder river during this period. Comparing these two \nestimates, we observed that at least 15 % of the CB transported by the Oder river \nwas deposited in the Oderhaff. The remaining 85 % (-730 kg), have been further \ntransported into the South Pomeranian Bight and Southern Baltic Sea.