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Perfluorooctanoate acid(PFOA)as a persistent organic pollutant has attracted significant attention worldwide in recent years.Due to its strong carbon-fluorine bonds and high water solubility,PFOA is extremely resistant to physical or chemical degradation process and thus persists in the environment.In this study,the feasibility of recovery of low concentration ammonium perfluorooctanoate(APFO)from wastewater in PVDF production was studied.