中国主要河流生活排污沉积物与河口沉积物中多溴联苯醚分布特征及转化研究

Polybrominated Diphenyl Ethers (PBDEs) is a series of persistent brominated compounds which have been worldwide used as flame retardant embedded in textiles, plastics, electronic products, and other materials. Nowadays more and more attention is paid to its pollution to the environment since their high lipophicity, bioaccumulation and toxicity. In this study, living sewage sludge and estuarine sediment samples were collected from Pearl River, Min River, Huai River and Song Hua River of China. The results shows that the concentration of ∑PBDEs and BDE-209 in estuarial sediment are 0.35-14.27 and 0.28-37.4ng/g, and the levels are changed in the order of Pearl River > Min River > Huai River > Song Hua River. However the contents of ∑PBDEs and BDE-209 are 16.64-160.22 and 37.08-867.53ng/g respectively which are almost higher than estuarial samples. The highest values of both ∑PBDEs and BDE-209 appear in Huai River. After PBDEs releasing to environmental, they would be partly or totally degraded. As the sediment is in an aquatic environment, pH is chose as a influencing factor to be studied. Furthermore, the characteristics of some congeners and special value are also be researched.