1. The occurrence of per- and polyfluoroalkyl substances (PFASs) in fluoropolymer raw materials and products made in China.
- Author
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Meng, Lingyi, Song, Boyu, Lu, Yao, Lv, Kun, Gao, Wei, Wang, Yawei, and Jiang, Guibin
- Subjects
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FLUOROALKYL compounds , *FLUOROPOLYMERS , *RAW materials , *PERSISTENT pollutants , *PERFLUOROOCTANOIC acid , *DETECTION limit - Abstract
• High level of PFOA was found in fluoropolymer raw materials and products made in China. • The concentration of PFOA in fluoropolymer raw materials was higher than products. • Hexafluoropropylene oxide oligomers have been heavily used to substitute PFOA in fluoropolymer manufacture in China. • HFPO-TrA, a PFOA substitute, was found in high level in some emulsion samples. 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 × 106 ng/g, and
- Published
- 2021
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