Sediment Records of Polybrominated Diphenyl Ethers (PBDEs) from the Anhui Province Section of Yangtze River, China

摘要

This study investigated the temporal changes of PBDEs in the sediment cores from the Anhui Province section of Yangtze River (YR), China. The dramatic increase of n-ary sumation Br-3-Br-9-BDEs and BDE-209 concentrations in cores in the period of ca. 1990-2008 was consistent with the booming of regional and national production and consumption of household appliances and electronics. Following declines in BDE-209 and n-ary sumation Br-3-Br-9-BDEs concentrations can be associated with the deceasing use of legacy commercial PBDE mixtures in recent years. Compared with the different regions around the world, sediments in the YR were moderately polluted by PBDEs. The levels and the detection rates of BDE-209 were highest among the detected PBDEs single congener. The composition analysis indicated that Deca-BDE, Octa-BDE, and Penta-BDE were the dominant forms in the YR. The increasing trends of both BDE-209 and n-ary sumation Br-3-Br-9-BDEs in the YR during 1990s and 2000s largely reflected the time periods for transferring PBDE sources from the developed countries to China. TOC and finer particles were strongly correlated with distributions of PBDEs in sediments.