Bioaccumulation of decabromodiphenyl ethane (dbdpe) in the Western Scheldt estuary
(English)Manuscript (preprint) (Other academic)
Decabromodiphenyl ethane (dbdpe) is a brominated flame retardant (BFR) with both a similar chemical structure and similar technical applications to a chemical of recognized environmental concern, decabromodiphenyl ether (decaBDE). Bioaccumulation has been one of the most controversial issues in the risk assessment of decaBDE, but it has not been measured for dbdpe. During the last several years, dbdpe has been detected in a variety of biota, which suggests that it is bioavailable. In this work, dbdpe was analyzed together with decaBDE in a benthic and pelagic food web in the Western Scheldt estuary, an environment known to be contaminated with the two BFRs. The biota-sediment accumulation factors for benthic invertebrates were low (0.0008-0.005) for both chemicals. This weak bioaccumulation into the lowest trophic levels of the food web may have been due to a poor bioavailability of the BFRs into the estuary. Both chemicals were transferred up through the food web, but biodilution was observed, not biomagnification (BMFs 0.2-0.8). The bioaccumulation behavior of dbdpe was similar to that of decaBDE.
Research subject Applied Environmental Science
IdentifiersURN: urn:nbn:se:su:diva-34176OAI: oai:DiVA.org:su-34176DiVA: diva2:284462