Cited by 169Per- and polyfluoroalkyl substances researchGroundwater flow and contamination studiesPesticide and Herbicide Environmental Studies

Partitioning of poly- and perfluoroalkyl substances from soil to groundwater within aqueous film-forming foam source zones

Open access
Hunter Anderson, R., Adamson, Dave T., Stroo, Hans F.·2019·Journal of Contaminant Hydrology

Abstract

Metadata from on-going site investigations at U.S. Air Force sites impacted by Aqueous Film-Forming Foam (AFFF) were used to evaluate primary factors that affect transport of poly- and perfluoroalkyl substances (PFAS) within source zones. Soil-to-groundwater ratios (γ Soil-GW ) were calculated for each site and PFAS as an empirical transport metric and regressed against select soil chemical and physical properties, as well as relevant interactions thereof, using analysis of covariance (ANCOVA). Total organic carbon and percent total clay content were significant covariates and best fit log-transformed γ Soil-GW with a parallel lines model. Regression parameters were used to derive apparent K OC estimates for 15 perfluoroalkyl acids, perfluorooctane sulfonamide, and the 6:2 and 8:2 fluorotelomer sulfonates, which were bimodal where significant differences were primarily observed between PFAS with fewer than 8 perfluorinated carbons (including perfluorooctoanoic acid; PFOA) and those with 8 or more (including perfluorooctane sulfonate; PFOS). Surprisingly, clay content was observed with a negative slope (i.e., γ Soil-GW decreased with increasing clay content), which may reflect greater retardation at more permeable sites due to air-water interfacial partitioning. Further analysis demonstrated that γ Soil-GW is also affected by the degree of flushing in a way that suggests mass transfer (as opposed to hysteretic desorption) primarily controls mass discharge at poorly flushed sit…

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Crossref · 10.1016/j.jconhyd.2018.11.011

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  • Anderson et al. (2019) demonstrated that soil is a significant reservoir for PFAS at AFFF source-zone sites across U.S. military installations.

    “Anderson et al. (2019) reported a meta-analysis of PFAS soil-to-groundwater concentration ratios for samples collected from 324 AFFF source-zone sites across 56 military installations distributed throughout the continental U.S. The results demonstrated that soil is a significant reservoir for PFAS at these contaminated sites.”

    From PFAS concentrations in soils: Background levels versus contaminated sites (2020) · cites this paper as Anderson et al. (2019)

  • The Soil-GW ratios were positive for the vast majority (87%) of data, reflecting greater soil concentrations.

    “Conversely, the ratios were positive for the vast majority (87%) of data, reflecting greater soil concentrations.”

    From PFAS concentrations in soils: Background levels versus contaminated sites (2020) · cites this paper as Anderson et al. (2019)

  • The results are consistent with the analysis reported by Anderson et al. (2019).

    “Thus, the results are consistent with the analysis reported by Anderson et al. (2019).”

    From PFAS concentrations in soils: Background levels versus contaminated sites (2020) · cites this paper as Anderson et al. (2019)

  • Approximately 13% of the Soil-GW ratios reported by Anderson et al. (2019) were negative, reflecting soil concentrations lower than corresponding groundwater concentrations.

    “Approximately 13% of the Soil-GW ratios were negative, reflecting soil concentrations that were lower than the corresponding groundwater concentrations.”

    From PFAS concentrations in soils: Background levels versus contaminated sites (2020) · cites this paper as Anderson et al. (2019)

  • Anderson et al. (2019) reported that aggregate soil-to-groundwater ratios for PFAS at U.S. Air Force AFFF-impacted sites varied over 9 orders of magnitude, with log-transformed values from approximately −2 to 7.

    “Anderson et al. (2019) reported metadata specifically on this topic based on the database of AFFF-impacted sites at U.S. Air Force Bases. Ratios of soil-to-groundwater (Soil-GW) concentrations were reported for all tabulated PFAS for all assessed sampling sites. The aggregate Soil-GW ratio was observed to vary over 9 orders of magnitude, with log-transformed values ranging from approximately −2 to”

    From PFAS concentrations in soils: Background levels versus contaminated sites (2020) · cites this paper as Anderson et al. (2019)

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Authors
Hunter Anderson, R., Adamson, D. T., & Stroo, H. F.
Venue
Journal of Contaminant Hydrology
Publisher
Elsevier BV
Published
2019-01
Volume
220
Pages
59-65
ISSN
0169-7722 (ISSN-L)
OpenAlex
W2902144279
Cited by
169
References
40
Citations by year
2026: 15 · 2025: 26 · 2024: 25 · 2023: 25 · 2022: 26 · 2021: 27 · 2020: 15 · 2019: 10
FWCI
1.09
Type
journal article
Language
en
Open access
Locations
  • Journal of Contaminant Hydrology (acceptedVersion)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Defense
  • U.S. Geological Survey
  • Oak Ridge National Laboratory
Topics
  • Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
  • Physical Sciences › Environmental Science › Environmental Engineering › Groundwater flow and contamination studies
  • Physical Sciences › Environmental Science › Pollution › Pesticide and Herbicide Environmental Studies
Keywords
per- and polyfluoroalkyl substances, PFAS, aqueous film-forming foam, source zone, organic carbon partition coefficient, clay content, total organic carbon, PFOS, fluorotelomer sulfonates, mass transfer, groundwater contamination, military base contamination
MeSH terms
Fluorocarbons, Soil, Water, Water Pollutants, Chemical, Groundwater

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