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Title (Primary) Polychlorinated naphthalenes and other dioxin-like acting compounds in Elbe river sediments
Author Brack, W.; Bláha, L.; Giesy, J.P.; Grote, M.; Möder, M.; Schrader, S.; Hecker, M.;
Journal Environmental Toxicology and Chemistry
Year 2008
Department WANA; ANA; COE;
Volume 27
Issue 3
Language englisch;
Keywords PCN; contamination; dioxin-like activity; flood 2002; Ah-receptor
Abstract Contamination of Elbe River sediments with dioxin-like acting toxicants was investigated following the 500-year flood of 2002 (flood that statistically occurs once in 500 years). It was hypothesized that large amounts of particulate matter from river beds and associated dioxin-like toxicants were mobilized and transported during this flood event. The investigation focused on polychlorinated naphthalenes (PCNs) that have not been determined previously in the Elbe River. The in vitro H4IIE-luc assay was used as an overall measure of toxicants capable of binding to the aromatic hydrocarbon receptor (AHR). The assay was combined with congener-specific instrumental analyses and fractionation to quantify PCN contributions to total AHR-mediated activity relative to polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) and polychlorinated biphenyls (PCBs). Penta- to octachloronaphthalene concentrations of 30 ng/kg dw up to 13 µg/kg dw, were found in River Elbe sediments downstream of Bitterfeld. However, concentrations of penta- to octachloronaphthalenes were only about 3 µg/kg dw at a site in the vicinity of Bitterfeld, where about 3 mg/kg dw have been reported before the flood. Also the congener pattern of PCNs at this site changed after the flood and PCN patterns that were previously reported for Bitterfeld and assigned to chlor-alkali electrolysis with graphite electrodes could now be observed at the sites between downstream of Bitterfeld and Magdeburg. While PCDD/Fs dominated the dioxin-like activity in the middle and lower Elbe River, PCNs contributed as much as 10 % of the total AhR-mediated activity. The contribution of PCBs was less significant (max. 0.2%). Thus, in Elbe River sediments PCNs should be considered as relevant contaminants and should be included in future monitoring and risk assessment programs.
ID 831
Persistent UFZ Identifier http://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=831
Brack, W., Bláha, L., Giesy, J.P., Grote, M., Möder, M., Schrader, S., Hecker, M. (2008):
Polychlorinated naphthalenes and other dioxin-like acting compounds in Elbe river sediments
Environ. Toxicol. Chem. 27 (3), 519 - 528