Publication Date:
2017-03-23
Description:
Under the EC sponsored research project ODER (Oder Discharge-Environmental
Response) first investigations have been carried out to estimate the chlorinated
biphenyls (CB) input into Oderhaff via the Oder river. For this purpose, vertical
profiles of CB content and composition were analysed on samples of three
sediment cores. In two water samples, the content of suspended particulate
material as weil as the particulate CB content and congener-specific composition
were measured.
In the Oderhaff the CB concentrations of particulate material were between 700 to
800 pg/dm3. Significant differences in the composition of the components were
not observed. In sediments, CB contents were as high as 17 to 24 ngig dry weight
in near surface sediment layers. They decreased with increasing sediment depth
and were below detection limits at 15 to 21 cm depth. Based on the size of the
49
accumulation area and related hydrographic conditions, we estimated an input of
95 kg into the Oderhaff for the last 65 years since the onset of CB production.
Applying the present prevailing conditions, we calculated an average transport of
about 825 kg CB by the Oder river during this period. Comparing these two
estimates, we observed that at least 15 % of the CB transported by the Oder river
was deposited in the Oderhaff. The remaining 85 % (-730 kg), have been further
transported into the South Pomeranian Bight and Southern Baltic Sea.
Type:
Article
,
NonPeerReviewed
Format:
text
Permalink
