Sorption of perfluorooctane sulfonate (PFOS) on oil and oil-derived black carbon: Influence of solution pH and [Ca2+]
Abstract
Sorption of perfluorooctane sulfonate (PFOS) to oil and oil-derived black carbon (BC) from solutions varying in pH and [Ca(2+)] was investigated. Oil is a strong sorbent for PFOS, together with the independence of oil-water distribution coefficient (K(oil)) on solution parameters (pH values and [Ca(2+)]), suggesting that hydrophobic interactions of the hydrophobic moieties of PFOS with oil played a dominant role. BC sorption for PFOS is not stronger or more nonlinear than other natural organic carbon from solution in the case of 0.5mM [Ca(2+)] and pH 5.05, indicating that specific adsorption sites on BC were probably not fit for PFOS. However, both sorption capacity and nonlinearity of PFOS increased obviously with decreasing solution pH and increasing [Ca(2+)], resulting in the potential importance of BC at environmentally low PFOS level, from solution at high [Ca(2+)] or low pH. The role of BC in PFOS sorption was significantly influenced by environmental conditions and solute aqueous concentrations.
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In batch experiments, the Freundlich sorption coefficient for PFOS in an air-dried soil rose from log Kf = 1.3 to log Kf = 2.24 when the amount of oil within the investigated soil was increased from 0 g kg-1 to 8.7 g kg-1.
“Chen et al. (2009) measured enhanced sorption of PFOS in the presence of crude oil in an air-dried soil.In batch experiments, the Freundlich sorption coefficient rose from log Kf = 1.3 to log Kf = 2.24 when the amount of oil within the investigated soil was increased from 0 g kg -1 to 8.7 g kg -1 .”
From Model-based identification of vadose zone controls on PFAS mobility under semi-arid climate conditions (2022) · cites this paper as Chen et al. (2009)
The N values determined in this study for PFOS and PFOA are consistent with the literature values.
“Overall, the N values determined in this study for PFOS and PFOA are consistent with the literature values.”
From Column versus batch methods for measuring PFOS and PFOA sorption to geomedia (2021) · cites this paper as Chen et al. (2009)
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“37 log units per unit pH (Higgins and Luthy, 2006), BC sorption is not stronger than other OC for PFOS.”
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- Authors
- Chen, H., Chen, S., Quan, X., Zhao, Y., & Zhao, H.
- Affiliations
- Dalian University of Technology (CN)
- Corresponding author
- Quan, Xie
- Venue
- Chemosphere
- Publisher
- Elsevier BV
- Published
- 2009-11
- Volume
- 77
- Issue
- 10
- Pages
- 1406-1411
- ISSN
- 0045-6535 (ISSN-L)
- OpenAlex
- W1987982801
- Cited by
- 92
- References
- 30
- Citations by year
- 2026: 5 · 2025: 7 · 2024: 6 · 2023: 8 · 2022: 8 · 2021: 6 · 2020: 4 · 2019: 7 · 2018: 7 · 2017: 4 · 2016: 3 · 2015: 6 · 2014: 9 · 2013: 4 · 2012: 4
- FWCI
- 2.03
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Chemosphere (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Key Research and Development Program of China
- Topics
- Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Keywords
- PFOS, black carbon, oil adsorption, solution pH, calcium ions, hydrophobic interactions
- MeSH terms
- Adsorption, Calcium, Environmental Pollutants, Fluorocarbons, Hydrogen-Ion Concentration, Oils, Alkanesulfonic Acids, Soot, Hydrophobic and Hydrophilic Interactions
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