Using foam fractionation to estimate PFAS air-water interface adsorption behaviour at ng/L and µg/L concentrations.

Buckley, T; Vuong, T; Karanam, K; Vo, PHN; Shukla, P; Firouzi, M; Rudolph, V

Using foam fractionation to estimate PFAS air-water interface adsorption behaviour at ng/L and µg/L concentrations.

Buckley, T Vuong, T Karanam, K Vo, PHN Shukla, P Firouzi, M Rudolph, V

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Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Water Res, 2023, 239, pp. 120028
Issue Date:: 2023-07-01

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Field	Value	Language
dc.contributor.author	Buckley, T
dc.contributor.author	Vuong, T
dc.contributor.author	Karanam, K
dc.contributor.author	Vo, PHN
dc.contributor.author	Shukla, P
dc.contributor.author	Firouzi, M
dc.contributor.author	Rudolph, V
dc.date.accessioned	2024-04-02T00:40:59Z
dc.date.available	2023-04-30
dc.date.available	2024-04-02T00:40:59Z
dc.date.issued	2023-07-01
dc.identifier.citation	Water Res, 2023, 239, pp. 120028
dc.identifier.issn	0043-1354
dc.identifier.issn	1879-2448
dc.identifier.uri	http://hdl.handle.net/10453/177403
dc.description.abstract	PFAS are biologically recalcitrant compounds that are persistent in the environment and have subsequently contaminated groundwater, landfill leachate and surface water. Due to their persistence and toxicity, there are environmental concentration limits imposed on some PFAS compounds that extend down to a few nanograms per litre and even proposals for reducing these to picogram per litre levels. Since PFAS concentrates at water-air interfaces as a result of their amphiphilic nature, this characteristic is important for the successful modelling and prediction of transport behaviour of PFAS through various systems. Here we present a procedure for using a foam fractionation method to experimentally determine the PFAS adsorption behaviour at ng/L and µg/L concentrations in the presence of salts. The equilibrium air-water adsorption coefficients for PFHxS and PFOA at different salinities and concentrations are experimentally shown to be constant across the range of PFAS concentrations investigated (approx. 0.1-100 µg/L). The adsorption isotherms may consequently be modelled by Henry or Langmuir style equations at these low concentrations.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartof	Water Res
dc.relation.isbasedon	10.1016/j.watres.2023.120028
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Engineering
dc.subject.mesh	Water
dc.subject.mesh	Adsorption
dc.subject.mesh	Fluorocarbons
dc.subject.mesh	Groundwater
dc.subject.mesh	Water Pollutants, Chemical
dc.subject.mesh	Water
dc.subject.mesh	Fluorocarbons
dc.subject.mesh	Water Pollutants, Chemical
dc.subject.mesh	Adsorption
dc.subject.mesh	Groundwater
dc.subject.mesh	Water
dc.subject.mesh	Adsorption
dc.subject.mesh	Fluorocarbons
dc.subject.mesh	Groundwater
dc.subject.mesh	Water Pollutants, Chemical
dc.title	Using foam fractionation to estimate PFAS air-water interface adsorption behaviour at ng/L and µg/L concentrations.
dc.type	Journal Article
utslib.citation.volume	239
utslib.location.activity	England
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
pubs.organisational-group	University of Technology Sydney/Strength - C3 - Climate Change Cluster
utslib.copyright.status	closed_access	*
dc.date.updated	2024-04-02T00:40:58Z
pubs.publication-status	Published
pubs.volume	239

Abstract:

PFAS are biologically recalcitrant compounds that are persistent in the environment and have subsequently contaminated groundwater, landfill leachate and surface water. Due to their persistence and toxicity, there are environmental concentration limits imposed on some PFAS compounds that extend down to a few nanograms per litre and even proposals for reducing these to picogram per litre levels. Since PFAS concentrates at water-air interfaces as a result of their amphiphilic nature, this characteristic is important for the successful modelling and prediction of transport behaviour of PFAS through various systems. Here we present a procedure for using a foam fractionation method to experimentally determine the PFAS adsorption behaviour at ng/L and µg/L concentrations in the presence of salts. The equilibrium air-water adsorption coefficients for PFHxS and PFOA at different salinities and concentrations are experimentally shown to be constant across the range of PFAS concentrations investigated (approx. 0.1-100 µg/L). The adsorption isotherms may consequently be modelled by Henry or Langmuir style equations at these low concentrations.

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http://hdl.handle.net/10453/177403