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Interactions of Per- and Polyfluoralkyl Substances (PFAS) with Landfill Liners

journal contribution
posted on 2020-12-31, 00:00 authored by Will GatesWill Gates, Alastair MacLeodAlastair MacLeod, Andras Fehervari, A Bouazza, D Gibbs, R Hackney, Damien CallahanDamien Callahan, M Watts
This review synthesises the available published research on interactions of per- and polyfluoroalkyl substances (PFAS) with landfill liners, with the view to inform on the expected behaviour of these persistent environmental pollutants in landfills. The review addresses the nature and significant types of PFAS compounds that are destined for landfills, as well as their by-product. It discusses the known and anticipated interactions with separate landfill liner components, namely geomembranes, geosynthetic clay liners and compacted clay liners. Various water-soluble PFAS are shown to advectively transport through geosynthetic clay liners (GCL) and showcase the limitations of relying on mineral liners alone to retain PFAS. Addition of activated carbon, while increasing saturated hydraulic conductivity, significantly increases PFAS retention by the GCL and reduced PFAS flux to manageable concentrations. An assessment of the relative risk for environmental exposure of different types of PFAS from landfills through interaction with those liner components is achieved with reference to published case studies of PFAS detection in and around landfills from Australia and around the World.

History

Journal

Advances in Environmental and Engineering Research

Volume

1

Issue

4

Pagination

1 - 40

Publisher

LIDSEN Publishing Inc.

Location

Beachwood, Ohio

ISSN

2766-6190

Language

English

Publication classification

C3 Non-refereed articles in a professional journal

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