我国近海全氟化合物分布特征及风险评估研究进展OA

Perfluorinated compounds(PFCs)have become new pollutants of great concern due to their environmental persistence and bioaccumulation.Through a systematic review of the concentration characteristics of PFCs in seawater,sediment and marine organisms in China's coastal waters in recent years,it is found that PFCs in seawater and sediments show a distribution of north high and south low;PFCs detected in marine organisms show small regional content differences but large inter-species content differences,and PFCs detection content between different biological tissues of the same species is different.Due to the lack of biotoxicological data related to marine organisms,it is impossible to obtain the predicted ineffective concentration,and the ecological risk of typical PFCs in China's offshore waters can not be assessed by the entropy method.At present,China's research on PFCs in the ocean is mainly concentrated in traditional research types,like perfluorooctanoic acid(PFOA),perfluorooctanesulfonic acid(PFOS)and other substances,with the international restriction of some perfluorinated compounds,the content of their substitutes in the environment can not be ignored,but there is very little research on substitutes.In addition,the existing research mainly focuses on the determination of PFCs concentrations in various media in the marine environment,and there are few studies on the environmental behavior characteristics of PFCs in the ocean and the toxic effects on marine organisms.In the future,research should be strengthened on the distribution and transformation patterns of typical PFCs and their alternatives in the environment,as well as their ecological toxicity effects,to provide a basis for assessing their ecological risks and protecting the health of China's marine environment.