Electrokinetic remediation for removal of per- and polyfluoroalkyl substances (PFASs) from contaminated soil

Abstract

Uncontrolled use and disposal of per-and polyfluoroalkyl substances (PFASs) in recent decades has resulted in extensive soil and groundwater contamination, necessitating counteraction. Electrokinetic remediation (EKR) offers a promising approach to in-situ soil remediation. Two novel modifications to conventional EKR were tested for the first time in a laboratory-scale study, to explore the capacity of EKR for PFAS removal. The first modi-fication was a two-compartment setup designed for PFAS extraction from soil to an electrolyte-filled chamber. The second was a single-compartment setup designed to transport and confine contaminants in a chamber filled with granular activated carbon (GAC), thus, combining extraction with stabilisation. Electromigration varied for individual compounds, based mainly on perfluorocarbon chain length and functional group. The results indicated up to 89% concentration and extraction of n-ary sumation PFASs for the two-compartment setup, with removal efficiency reaching 99% for individual PFASs with C

Keywords

Electrokinetics; Treatment; PFAS; Adsorption; Soil; Groundwater

Published in

Chemosphere
2022, volume: 291, number: Part 3, article number: 133041
Publisher: PERGAMON-ELSEVIER SCIENCE LTD

SLU Authors

• Niarchos, Georgios

  • Uppsala University

• Sörengård, Mattias

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

• Ahrens, Lutz

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

Global goals (SDG)

SDG3 Good health and well-being

UKÄ Subject classification

Soil Science

Publication identifier

• DOI: https://doi.org/10.1016/j.chemosphere.2021.133041

Permanent link to this page (URI)

https://res.slu.se/id/publ/116404