Cited by 284Per- and polyfluoroalkyl substances researchAdsorption and biosorption for pollutant removalFluoride Effects and Removal

Effect of solution chemistry on the adsorption of perfluorooctane sulfonate onto mineral surfaces

Tang, Chuyang Y., Shiang Fu, Q., Gao, Dawen, Criddle, Craig S., Leckie, James O.·2010·Water Research

Abstract

Perfluorooctane sulfonate (PFOS) is an emergent contaminant of substantial environmental concerns, yet very limited information has been available on PFOS adsorption onto mineral surfaces. PFOS adsorption onto goethite and silica was investigated by batch adsorption experiments under various solution compositions. Adsorption onto silica was only marginally affected by pH, ionic strength, and calcium concentration, likely due to the dominance of non-electrostatic interactions. In contrast, PFOS uptake by goethite increased significantly at high [H+] and [Ca2+], which was likely due to enhanced electrostatic attraction between the negatively charged PFOS molecules and positively charged goethite surface. The effect of pH was less significant at high ionic strength, likely due to electrical double layer compression. PFOS uptake was reduced at higher ionic strength for a strongly positively charged goethite surface (pH 3), while it increased for a weakly charged surface (pH 7 and 9), which could be attributed to the competition between PFOS-surface electrostatic attraction and PFOS-PFOS electrostatic repulsion. A conceptual model that captures PFOS-surface and PFOS-PFOS electrostatic interactions as well as non-electrostatic interaction was also formulated to understand the effect of solution chemistry on PFOS adsorption onto goethite and silica surfaces.

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Crossref · 10.1016/j.watres.2010.01.038

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  • PFAS sorption mechanisms are influenced by PFAS chain length and solution chemistry (ionic strength, cation valence, pH).

    “All the above sorption mechanisms were also found to be influenced by the PFAS chain length (e.g., Campos-Pereira et al., 2018) and solution chemistry, especially the ionic strength, the valence of cations and the pH (Tang et al., 2010;Brusseau and Van Glubt, 2019;Cai et al., 2022;Lyu and Brusseau, 2020)”
  • Studies using specific soil minerals validated the finding that PFAAs may sorb onto metal oxides such as iron and aluminum oxides including hematite, goethite, and boehmite.

    “Nevertheless, studies using specific soil minerals validated our finding.For instance, several studies show that PFAAs may sorb onto metal oxides such as iron and aluminum oxides including hematite, goethite, and boehmite (Gao and Chorover, 2012;Tang et al., 2010;Wang et al., 2012;Zhao et al., 2014) particularly because many iron oxides, may have a net positive surface charge around neutral pH (Hs”

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Authors
Tang, C. Y., Shiang Fu, Q., Gao, D., Criddle, C. S., & Leckie, J. O.
Affiliations
  • Nanyang Technological University (SG)
  • Northeast Forestry University (CN)
  • Stanford University (US)
Corresponding author
Tang, Chuyang Y.
Venue
Water Research
Publisher
Elsevier BV
Published
2010-04
Volume
44
Issue
8
Pages
2654-2662
ISSN
0043-1354 (ISSN-L)
OpenAlex
W2062113196
Cited by
284
References
24
Citations by year
2026: 18 · 2025: 25 · 2024: 37 · 2023: 24 · 2022: 24 · 2021: 16 · 2020: 26 · 2019: 16 · 2018: 13 · 2017: 17 · 2016: 18 · 2015: 12 · 2014: 10 · 2013: 8 · 2012: 8
FWCI
7.54
Type
journal article
Language
en
Open access
closed
Locations
  • Water Research (publishedVersion)
  • PubMed (publishedVersion)
  • The HKU Scholars Hub (University of Hong Kong) (submittedVersion)
Funders
Ministry of Education - Singapore
Topics
  • Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
  • Physical Sciences › Environmental Science › Water Science and Technology › Fluoride Effects and Removal
Keywords
PFOS, goethite, silica, solution chemistry, pH effect, ionic strength, calcium concentration, electrostatic interactions, non-electrostatic interactions, mineral surfaces
MeSH terms
Adsorption, Environmental Pollutants, Environmental Pollution, Fluorocarbons, Minerals, Silicon Dioxide, Alkanesulfonic Acids, Iron Compounds

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