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REVIEW OF THE FATE AND TRANSFORMATION OF PER- AND POLYFLUOROALKYL SUBSTANCES (PFASs) IN LANDFILLS
Hamid, H., L.Y. Li, and J.R. Grace.
Environmental Pollution 235:74-84(2018)

Despite its restricted use, PFOA remains one of the most abundant perfluorinated alkyl acids (PFAAs) in landfill leachates. The presence of PFAA precursors (e.g., saturated and unsaturated fluorotelomer carboxylic acids) also has been documented in landfill leachates at high concentrations. Landfill ambient air has been found to contain elevated concentrations of PFASs, primarily semi-volatile precursors (e.g., fluorotelomer alcohols), compared to upwind control sites, which suggests that landfills are potential sources of atmospheric PFASs. PFAS fate inside landfills is controlled by a combination of biological and abiotic processes, with biodegradation releasing most of the PFASs from landfilled waste to leachate. Determination of PFAA precursors and their degradation products is recommended for future studies to avoid significant underestimation of total PFAS released from landfills.



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