Cited by 1,563Per- and polyfluoroalkyl substances researchEnvironmental Chemistry and AnalysisToxic Organic Pollutants Impact

Sorption of Perfluorinated Surfactants on Sediments

Higgins, Christopher P., Luthy, Richard G.·2006·Environmental Science & Technology

Abstract

The sorption of anionic perfluorochemical (PFC) surfactants of varying chain lengths to sediments was investigated using natural sediments of varying iron oxide and organic carbon content. Three classes of PFC surfactants were evaluated for sorptive potential: perfluorocarboxylates, perfluorosulfonates, and perfluorooctyl sulfonamide acetic acids. PFC surfactant sorption was influenced by both sediment-specific and solution-specific parameters. Sediment organic carbon, rather than sediment iron oxide content, was the dominant sediment-parameter affecting sorption, indicating the importance of hydrophobic interactions. However, sorption also increased with increasing solution [Ca2+] and decreasing pH, suggesting that electrostatic interactions play a role. Perfluorocarbon chain length was the dominant structural feature influencing sorption, with each CF2 moiety contributing 0.50-0.60 log units to the measured distribution coefficients. The sulfonate moiety contributed an additional 0.23 log units to the measured distribution coefficient, when compared to carboxylate analogs. In addition, the perfluorooctyl sulfonamide acetic acids demonstrated substantially stronger sorption than perfluorooctane sulfonate (PFOS). These data should prove useful for modeling the environmental fate of this class of contaminants.

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Crossref · 10.1021/es061000n

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19 of 19 references verified0 citation errors · 0 not checkable

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  • Long-chain PFAS (PFOS and PFOA) were detected exclusively in fluvial sediments, consistent with their known affinity for particulate matter and sediment organic carbon.

    “Long-chain PFAS (e.g., PFOS and PFOA) were detected exclusively in fluvial sediments, consistent with their known affinity for particulate matter and sediment organic carbon.”
  • Adsorption by the solid phase is always a contributing factor to some degree, with its impact mediated by geochemical properties of the geomedia and physicochemical properties of the PFAS.

    “In addition, adsorption by the solid phase is always a contributing factor to some degree, with its impact mediated by geochemical properties of the geomedia and physicochemical properties of the PFAS (e.g., Higgins and Luthy, 2006; Anderson et al., 2016; Brusseau, 2019).”

    From PFAS concentrations in soils: Background levels versus contaminated sites (2020) · cites this paper as Higgins and Luthy, 2006

  • OM content of soil is recognized as a significant parameter controlling the adsorption of LC-PFASs, but it is not always the only indicator of PFAS sorption to soil/sediments.

    “While the OM content of soil is recognized as a significant parameter controlling the adsorption of LC-PFASs, it is not always the only indicator of PFAS sorption to soil/sediments.39,43,70”
  • PFAS molecules and precursors are involved in both hydrophobic and electrostatic adsorption to soil/sediment/SS particles and air-water interfaces, a significant PFAS retention mechanism under unsaturated conditions.

    “PFAS molecules and precursors, however, are involved in both hydrophobic and electrostatic adsorption to soil/sediment/SS particles and air–water interfaces (AWI), a significant PFAS retention mechanism under unsaturated conditions.”
  • Other factors, such as low fine particle content and an increase of cation content (and ionic strength) in filter material, can diminish the adsorption capacity of a biofilter over time.

    “Other factors, such as low fine particle content and an increase of cation content (and ionic strength) in filter material, can diminish the adsorption capacity of a biofilter over time.39,70”

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Authors
Higgins, C. P., & Luthy, R. G.
Affiliations
Stanford University (US)
Corresponding author
Luthy, Richard G.
Venue
Environmental Science & Technology
Published
2006-10-07
Volume
40
Issue
23
Pages
7251-7256
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2011384751
Cited by
1,563
References
19
Citations by year
2026: 184 · 2025: 144 · 2024: 118 · 2023: 117 · 2022: 128 · 2021: 120 · 2020: 90 · 2019: 87 · 2018: 72 · 2017: 60 · 2016: 60 · 2015: 48 · 2014: 58 · 2013: 58 · 2012: 51
FWCI
21.49
Type
journal article
Language
en
Open access
closed
Locations
  • Environmental Science & Technology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Science Foundation
Topics
  • Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
  • Physical Sciences › Environmental Science › Environmental Chemistry › Environmental Chemistry and Analysis
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
Keywords
perfluorinated surfactants, sorption, sediment, perfluorocarboxylates, PFOS, distribution coefficient, organic carbon, iron oxide, chain length, hydrophobic interactions, electrostatic interactions, calcium, pH, environmental fate modeling
MeSH terms
Adsorption, Calcium, Carbon, Chromatography, Liquid, Ferric Compounds, Hydrocarbons, Fluorinated, Hydrogen-Ion Concentration, Kinetics, Surface-Active Agents, Geologic Sediments, Tandem Mass Spectrometry

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