Cited by 180Per- and polyfluoroalkyl substances researchEnvironmental Chemistry and AnalysisSurfactants and Colloidal Systems

The influence of surfactant and solution composition on PFAS adsorption at fluid-fluid interfaces

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Brusseau, Mark L., Van Glubt, Sarah·2019·Water Research

Abstract

The objective of this research is to examine the influence of surfactant and solution composition on PFAS adsorption at fluid-fluid interfaces. Surface tensions were measured for select PFAS, as well as a representative hydrocarbon surfactant. These data are supplemented with data sets collected from the literature. The influence of surfactant headgroup charge, specifically for zwitterionic PFAS, was investigated. The impacts of surfactant counterion for ionic PFAS and the influence of headgroup size for nonionic PFAS were also investigated. In addition, the influence of solution ion composition, ionic strength, and pH was examined. The impact of co-solutes, specifically ethanol, humic acid, and trichloroethene, was also examined, as well as the behavior of PFAS mixtures and fluorocarbon-hydrocarbon surfactant mixtures. The data were interpreted within the framework of a QSPR model recently developed to predict fluid-fluid interfacial adsorption coefficients (K i) of PFAS. The results demonstrate that all of the factors investigated have some degree of impact on K i values. Thus, the composition of soil-pore water and groundwater is likely to affect the magnitude of PFAS adsorption at air-water and organic liquid-water interfaces. However, the influence on K i of most of the factors investigated is small for lower PFAS concentrations (less than ∼1-10 mg/L). Hence, their impacts on fluid-fluid interfacial adsorption are likely to be relatively minor at the low PFAS concentrations representative of many environmental systems, especially compared to the impact of other factors such as fluid saturations, porous-medium properties, and PFAS molecular structure. The results of this study indicate that the revised QSPR model provides reasonable first-order predictions of K i for a wide range of PFAS in environmental systems.

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Crossref · 10.1016/j.watres.2019.05.095

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  • PFAS compounds exhibit amphiphilic properties, with both hydrophobic fluorocarbon chains and hydrophilic functional groups, which contribute to their ability to reduce the surface tension of water.

    “PFAS compounds exhibit amphiphilic properties, with both hydrophobic fluorocarbon chains and hydrophilic functional groups, which contribute to their remarkable ability to reduce the surface tension of water [80].”

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Research works printed but not linked: 3

  1. Holland PM, Rubingh DN, 1992 Mixed surfactant systems. Chapter 1, pg 2– 30, in: Hollandand Rubingh, eds.; Mixed Surfactant Systems ACS Symposium Series; American Chemical Society: Washington, DC.
  2. SERDP, ESTCP, 2017 Workshop on research and demonstration needs for management of AFFF-impacted sites.
  3. Talbot EL 1953 The effects of pH and ionic strength upon the surface tension of certain perfluoro alkyl acids and their salts. Proceedings of the 124th meeting of the American Chemical Society, Chicago, Il, Abstracts 4-I.

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Authors
Brusseau, M. L., & Van Glubt, S.
Affiliations
University of Arizona (US)
Corresponding author
Brusseau, Mark L.
Venue
Water Research
Publisher
Elsevier BV
Published
2019-09
Volume
161
Pages
17-26
ISSN
0043-1354 (ISSN-L)
OpenAlex
W2947798350
Cited by
180
References
72
Citations by year
2026: 26 · 2025: 27 · 2024: 33 · 2023: 26 · 2022: 24 · 2021: 22 · 2020: 17 · 2019: 5
FWCI
7.37
Type
journal article
Language
en
Open access
Locations
  • Water Research (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Environmental Health Sciences (P42 ES04940)
Topics
  • Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
  • Physical Sciences › Environmental Science › Environmental Chemistry › Environmental Chemistry and Analysis
  • Physical Sciences › Chemistry › Organic Chemistry › Surfactants and Colloidal Systems
Keywords
PFAS, perfluorinated compounds, surface tension, ionic strength, pH, cosolutes, ethanol, humic acid, trichloroethylene, QSPR models, soil pore water, groundwater, air-water interface, surfactant mixtures
MeSH terms
Adsorption, Fluorocarbons, Surface Tension, Surface-Active Agents, Groundwater

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