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ARE GEOTEXTILES SILENT CONTRIBUTORS OF ULTRASHORT CHAIN PFASS TO THE ENVIRONMENT?
Mikhael, E., A. Bouazza, W.P. Gates, and D. Gibbs,
Environmental Science & Technology 58(20):8867-8877(2024)
Filed Under: Research
Filed Under: Research
The presence of PFAS in woven and nonwoven polypropylene geotextiles and four nonwoven polyester geotextiles commonly used in modern geosynthetic composite lining systems for waste containment facilities such as landfills was investigated. Targeted analysis for 23 environmentally significant PFAS molecules and methods for examining "PFAS total" concentrations were used to assess their occurrence. Most geotextile specimens contained PFPrA with concentrations ranging from non-detect to 10.84 µg/g. Average PFPrA concentrations of PFPrA were higher in polypropylene than in polyester geotextiles. PFAS total parameters comprising total fluorine and total oxidizable precursors indicated no significant precursor mass or untargeted intermediates were present in geotextiles. The study identified geotextiles as a possible source of ultrashort PFAS in engineered lined waste containment facilities, which may contribute to the overall PFAS total concentrations in leachates or liquors they are in contact with. Findings may lead to further implications on the fate and migration of PFAS in geosynthetic composite liners, as previously unidentified concentrations, particularly of ultrashort-chain PFAS, may impact the extent of PFAS migration through and attenuation by constituents of geosynthetic composite liner systems.
Environmental Science & Technology 58(20):8867-8877(2024)
Filed Under: Research
Filed Under: Research
The presence of PFAS in woven and nonwoven polypropylene geotextiles and four nonwoven polyester geotextiles commonly used in modern geosynthetic composite lining systems for waste containment facilities such as landfills was investigated. Targeted analysis for 23 environmentally significant PFAS molecules and methods for examining "PFAS total" concentrations were used to assess their occurrence. Most geotextile specimens contained PFPrA with concentrations ranging from non-detect to 10.84 µg/g. Average PFPrA concentrations of PFPrA were higher in polypropylene than in polyester geotextiles. PFAS total parameters comprising total fluorine and total oxidizable precursors indicated no significant precursor mass or untargeted intermediates were present in geotextiles. The study identified geotextiles as a possible source of ultrashort PFAS in engineered lined waste containment facilities, which may contribute to the overall PFAS total concentrations in leachates or liquors they are in contact with. Findings may lead to further implications on the fate and migration of PFAS in geosynthetic composite liners, as previously unidentified concentrations, particularly of ultrashort-chain PFAS, may impact the extent of PFAS migration through and attenuation by constituents of geosynthetic composite liner systems.
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