The occurrence of per-and polyfluoroalkyl substances(PFASs) in fluoropolymer raw materials and products made in China  

作　　者：Lingyi Meng Boyu Song Yao Lu Kun Lv Wei Gao Yawei Wang Guibin Jiang 

机构地区：[1]Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Foreign Environmental Cooperation Center,Ministry of Ecology and Environment of the China,Beijing 100035,China [4]School of Environment,Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310000,China [5]Environment Research Institute,Shandong University,Qingdao 266237,China

出　　处：《Journal of Environmental Sciences》2021年第9期77-86,共10页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.21625702)。

摘　　要：Perfluorooctanoic acid(PFOA), its salts, and related compounds were listed as new persistent organic pollutants by the Stockholm Convention in 2019.In this study, the occurrence of residues of PFOA and other per-and polyfluoroalkyl substances(PFASs) in raw materials and fluoropolymer products from the Chinese fluoropolymer industries are reported for the first time.The PFOA concentrations in raw materials and fluoropolymer products were in the range of 6.7 to 1.1 × 10^(6) ng/g, and <MDL(method detection limit) to 5.3 × 10^(3) ng/g,respectively.Generally, the levels of PFOA in raw materials were higher than in products,implying that PFOA in the emulsion/dispersion resin could be partly removed during the polymerization or post-processing steps.By tracking a company’s polytetrafluoroethylene(PTFE) production line, it was found that over a 5 year period, the residual levels of PFOA in emulsion samples declined from 1.1 × 10^(6) to 28.4 ng/g, indicating that the contamination of PFOA in fluoropolymer products from production source gradually decreased after its use had been discontinued.High concentrations of HFPO-TrA(2.7 × 10^(5) to 8.2 × 10^(5) ng/g) were detected in some emulsion samples indicating this alternative has been widely applied in fluoropolymer manufacturing in China.

关 键 词：FLUOROPOLYMER Per-and polyfluoroalkyl substances(PFASs) Perfluorooctanoic acid(PFOA) Perfluoro-2 5-dimethyl-3 6-dioxanonanoic acid(HFPO-TrA) 

分 类 号：X592[环境科学与工程—环境工程]