Foam fractionation removal of multiple per- and polyfluoroalkyl substances from landfill leachate
McCleaf, Philip; Kjellgren, Ylva; Ahrens, LutzAbstract
Per- and polyfluoroalkyl substances (PFAS) are a common contaminant inmunicipal landfill leachate and are recognized as a pollutant on global scale.The present work examined foam fractionation (FF) in batch and continuousmodes as an appropriate treatment technique for PFAS removal for the landfillleachate and found stable removal efficiency of greater than 90% for PFOA(C7), PFOS (C8), PFHxS (C6), and PFHpA (C6) and 6:2 FTSA (C6). For otherPFAS such as PFNA (C8), PFPeS (C4), PFHxA (C5), PFHpS (C7), and PFBS(C4), a less stable removal between 80% and 50% was achieved while between50% and 20% removal was observed for EtFOSAA (C8), PFBA (C3), PFDA (C9),FOSA (C8), PFPeA (C4), and MeFOSAA (C8). Increased air flowrate, additionof iron (III) oxide (Fe+3) coagulant, conductivity, and greater untreated leach-ate PFAS concentration were factors resulting in increased removal efficiencyfor the majority of PFAS.
Keywords
foam fractionation; landfill leachate; PFAS; removal; surface active foam fractionation; treatment techniquesPublished in
Awwa Water Science2021, volume: 3, number: 5, article number: e1238
Authors' information
UKÄ Subject classification
Environmental Sciences
Publication Identifiers
DOI: https://doi.org/10.1002/aws2.1238
URI (permanent link to this page)
https://res.slu.se/id/publ/118630