Research progress on the pollution, adsorption, and transport of perfluorooctanoic acid (PFOA ) at the sediment-water interface

doi:10.13287/j.1001-9332.202111.034

Abstract

Abstract: Perfluorooctanoic acid (PFOA) is an important perfluorinated surfactant, which has received great attention as an emerging pollutant, due to its persistence, high toxicity, and bioaccumulation. Sediment is an important environmental reservoir for PFOA, while polluted sediment can serve as a long-term contamination source causing pollution to overlying surface water and surrounding groundwater. Here, the source, pollution level, adsorption and transport of PFOA at the sediment-water interface were systematically reviewed. Industrial discharge was the major release for PFOA entering surface water and sediment. PFOA was generally at ng·L^-1 and ng·g^-1 levels in global surface water and sediment. More serious pollution was found in some parts of China. Sediment composition, hadrochemical condition, natural organic matter, and surfactants could strongly affect PFOA adsorption in sediment, though the controlling mechanisms were controversial. Research on PFOA transport in sediment had just been started with limited progress. There is a great gap in understanding the mechanisms underlying PFOA transport in sediment, which should be strengthened in the future.

Key words: poly- and perfluoroalkyl substances (PFAS), sediment, surface water, pollution eco-logy, interfacial behavior.

LYU Xue-yan, SUN Yuan-yuan, YU Zhi-guo, WU Ji-chun. Research progress on the pollution, adsorption, and transport of perfluorooctanoic acid (PFOA ) at the sediment-water interface[J]. Chinese Journal of Applied Ecology, 2021, 32(11): 4147-4155.

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