全氟（多氟）烷基化合物（PFASs）在全球海洋中的分布与长距离传输机制研究

作为一种新兴的持久性有机污染物，全氟（多氟）化物（PFASs）所造成的全球性污染已成为事实，并成为持久性有机污染物研究的又一前沿与热点领域。本文拟通过深入分析离子性PFASs（PFCAs、PFSAs）和挥发性/半挥发性PFASs（FTOHs、FTAs、FASAs、FASEs）在全球海洋水体与大气中的空间分布特征及其组分共生关系，结合大气后向轨迹模拟（BTs）和洋流分析，开展PFASs从低纬度源区至南北极高纬海域的空间分布、来源解析、圈层交换以及长距离传输机制研究，运用不同的理论模型评价挥发性/半挥发性PFASs的沉降与光化学反应过程，揭示PFASs在全球海洋环境中的迁移、沉积与消减机理。

Emerging persistent organic pollutants (Emerging POPs) are a new group of anthropogenic chemicals that are persistent in the environment and toxic to the human beings and ecological systems, such as per- and polyfluoroalkyl substances (PFASs). Currently, the mechanism of long-range atmospheric transport and oceanic circulation of these pollutants are hot topic of the environmental sciences, because some studies have provided evidences that atmospheric transport and oceanic circulation are the mainly pathways redistributing PFASs on a global scale and introducing them to the remote areas such as Arctic. The proposed project aims to: (1) determining the concentration levels of ioniic PFASs (PFCAs and PFSAs) in the global oceans (Pacific Ocean, Indian Ocean, Atlantic Ocean, Arctic and Antarctic Ocean); (2) determining the concentration levels of neutral PFASs (FTOHs, FTAs, FASAs and FASEs) in the atmosphere of the global oceans (Pacific Ocean, Indian Ocean, Atlantic Ocean, Arctic and Antarctic Ocean); (3) analyzing the mechanism of the long-range transport of PFASs from source regions to remote oceans and polar regions. This project will improve the knowledge and understanding of environmental fate of PFASs in the marine and polar ecosystems.