中国主要河口地区工业排污沉积物与土壤中多溴联苯醚的分布特征与降解规律研究

Polybrominated Diphenyl Ethers (PBDEs) are worldwide used as flame retardant in industry, especially in electronic industry. The heavy molecule congeners of PBDEs have a tendency to break down into lower and more toxicity brominated congeners in the environment. So they have attracted great attention and interests since their high lipophicity, bioaccumulation and toxicity. In this study, industrial pollution discharge sediment and soil samples were collected from estuarial area of Pearl River, Min River, Huai River and Song Hua River of China. The result shows that the concentrations of ∑PBDEs in industrial pollution discharge sediment and soil are 2.21-11.19ng/g and 0.39-21.44ng/g. And the BDE-209 are 5.51-129.16ng/g and 5.51-129.16ng/g. The levels are varied in the order of Pearl River>Min River>Huai River>Song Hua River. Since the evaporation quantity is related with temperature, the content of PBDEs (including BDE-209) increased as the latitude rising. For the degraded congeners, the characteristic ratio of BDE-47/BDE99 act a negative correlation with latitude in industrial pollution discharge sediment however it is almost constant in soil. The ratio of BDE-(47+99)/∑PBDEs in both industrial pollution discharge sediment and soil is increasing as the latitude rising.