氟调聚醇（FTOHs）在全球尺度上的迁移转化、圈层交换及其与生物泵耦合过程研究

氟调聚醇（FTOHs）是全氟烷基羧酸（PFCAs）重要的前体物质，被广泛地应用于工业生产的各个环节和产品。研究表明该类化合物已造成包括南北两极的全球性污染。本课题拟通过深入调查FTOHs在全球环境大气中的浓度水平、时空分布特点，研究全球尺度上FTOHs的长距离迁移过程、大气沉降过程、海/气交换过程、光化学转化过程和其与海洋生物泵耦合过程，深入了解FTOHs及其主要降解产物PFCAs在全球海洋各环境介质迁移转化机制和在食物链中的传递富集规律，揭示FTOHs的迁移、沉积与消减机理，为制定FTOHs及其主要降解产物PFCAs在全球海洋生态系统中的风险评估提供技术支持，同时也为国家制定合理的FTOHs及其主要降解产物PFCAs风险管理决策提供参考。

Fluorotelomer alcohols （FTOHs）are a major class of PFCA precursors (perfluorocarboxylic acid precursors). They were widely used in series of products and the industrial processes. FTOHs were already determined in everywhere along the global scales, including Antarctica and Arctic. The proposed project aims to: (1) determining the concentration levels and variations of FTOHs in the atmosphere in the global scales (Arctic Ocean, Pacific Ocean, Antarctic Ocean, Antarctic and Arctic land areas); (2) studying the processes of the long-range transport of FTOHs from source regions to remote oceans and polar regions, including the processes of atmospheric diffusion, atmospheric deposition, exchange of sea/air interface, transfer of photochemistry and coupling with biological bump; 3) Elucidating reduction mechanism of FTOHs in the global scales and the enrichment regularity of FTOHs in the chain of food in the marine ecosystems. This project will improve the knowledge and understanding of environmental fate of FTOHs in the marine and polar ecosystems.