Chlorobiphenyls in suspension and sediment of the southern Baltic Sea: a mass balance calculation since the onset of PCB-production

摘要: The effect of the supply chlorinated biphenyls by river Oder into some adjacent areas Baltic Sea was studied in nine sediment cores and 10 suspended matter samples. Congener-specific analysis carried out on 28 individual chlorobiphenyls (CBs). ∑CB concentrations suspension ranged from 2.4 pg dm-3 southern Bornholm Basin to 986 Achterwasser. contents surface decreased with increasing distance mouth. Highest were found Oderhaff (18 ng g-1 dw) decreasing 2 dw Basin. generally more or less regularly depth. compositions CB mixtures surficial samples rather similar, suggesting a common source. Compositions showed distinct differences. These may reflect variations source strength over time. Mass balance considerations basis CBs resulted an estimation total storage approximate 733±158 kg ∑CBs Oderhaff, Achterwasser, Greifswalder Bodden, Rinne, Arkona past 65 years, covering time period since first produced. Based data about 500 supplied during this Oder, that thus be major these compounds for Sea.