Abstract

Per- and polyfluoroalkyl substances (PFAS) are a common contaminant in municipal landfill leachate and are recognized as a pollutant on global scale. The present work examined foam fractionation (FF) in batch and continuous modes as an appropriate treatment technique for PFAS removal for the landfill leachate 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 other PFAS such as PFNA (C8), PFPeS (C4), PFHxA (C5), PFHpS (C7), and PFBS (C4), a less stable removal between 80% and 50% was achieved while between 50% and 20% removal was observed for EtFOSAA (C8), PFBA (C3), PFDA (C9), FOSA (C8), PFPeA (C4), and MeFOSAA (C8). Increased air flowrate, addition of iron (III) oxide (Fe+3) coagulant, conductivity, and greater untreated leachate PFAS concentration were factors resulting in increased removal efficiency for the majority of PFAS.Article Impact StatementEfficient PFAS removal from landfill leachate using surface-active foam fractionation treatment with examination of key process parameters.

Keywords

foam fractionation; landfill leachate; PFAS; removal; surface active foam fractionation; treatment techniques

Published in

Awwa Water Science
2021, Volume: 3, number: 5, article number: e1238

SLU Authors

• Ahrens, Lutz

  • Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Environmental Sciences


Publication identifier

DOI: https://doi.org/10.1002/aws2.1238

Permanent link to this page (URI)

https://res.slu.se/id/publ/118630