DISTRUBUTION OF PBDES IN SURFACE SEDIMENTS FROM THE BERING SEA,CHUKCHI SEA AND CHUKCHI PLATEAU

摘要

11 PBDEs congeners were analyzed for 24 surface sediment samples, which were collected from the Bering Sea, Chukchi Sea and Chukchi Plateau during the 3rd Chinese National Arctic Research Expedition in July-September, 2008 and 8 congeners were detected. Concentrations of ∑PBDEs (sum of PBDE congeners without BDE209) and BDE-209 varied from 3.58 to 148.95 pg/g and from n.d. to 804.91 pg/g, respectively. The spatial variability of PBDEs concentrations indicated that BDE-209 was the predominant congener detected in most stations, consistent with the fact that technical deca-BDE mixtures are presently the dominant technical PBDE mixtures. Slightly different PBDE compositions were observed among samples collected from stations near the Barrow Point, indicating that technical penta-BDE mixture may be an important source from Alaska.