Subsurface transport potential of perfluoroalkyl acids (PFAAs): Column experiments and modeling

Journal of Contaminant Hydrology
Jennifer L GuelfoChristopher P Higgins

Abstract

Transport of ten perfluoroalkyl acids (PFAAs) was studied with one-dimensional (1-D) saturated column experiments using four soil types with an organic carbon fraction (foc) range of ~0-0.045. Columns were operated under conditions relevant to aqueous film-forming foam (AFFF)-impacted fire protection training areas to determine the ability of equilibrium transport parameters to describe 1-D PFAA transport, if rate-limited sorption influences PFAA transport, and if kinetic parameters can be used to evaluate factors causing rate-limited sorption. Results of initial screening of PFAA breakthrough found that over half of the breakthrough curves deviated from equilibrium transport and merited further investigation. Subsequent analysis showed that, in many cases, these deviations could be accounted for by considering the range of applicable equilibrium Kd values (i.e. based on standard deviation) applicable to the solid phase. Thus, transport of the majority of PFAAs in 3 soils with foc of 0-0.017 was not impacted by rate-limited sorption. Further, low sorption led to transport that was essentially simultaneous for the majority of PFAAs in these porous media. Exceptions were observed for long-chain PFAAs, and also in a fourth soil wi...Continue Reading

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Apr 10, 2013·Environmental Science & Technology·Jennifer L Guelfo, Christopher P Higgins
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Jan 27, 2015·Environmental Science & Technology·Erica R McKenzieChristopher P Higgins
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Jun 27, 2018·Environmental Science & Technology·Ying LyuXueyu Lin
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Citations

Dec 12, 2020·The Science of the Total Environment·Matthew W Sima, Peter R Jaffé
Mar 20, 2021·The Science of the Total Environment·Yake WangMark L Brusseau
Jul 2, 2021·The Science of the Total Environment·Guanhong LiuKuangfei Lin
Jun 15, 2021·The Science of the Total Environment·Tiffani T CáñezMark L Brusseau
Jul 18, 2021·Water Research·Mark L BrusseauYing Lyu
Jul 7, 2021·Environmental Science & Technology·Marzieh ShojaeiJennifer Guelfo
Oct 20, 2021·Environmental Science & Technology·Andrew C MaizelChristopher P Higgins
Nov 27, 2021·Environmental Science and Pollution Research International·Qi ZhangYuanyuan Sun

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