ArticleThe Science of the total environment2022
Air-water interfacial adsorption of C4-C10 perfluorocarboxylic acids during transport in unsaturated porous media.
Article in The Science of the total environment, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed, 33 citations in OpenAlex.
- Current Research Advances and Future Prospects on Microbial Consortia for Sustainable PFAS Remediation.International journal of molecular sciences · 2026Review
- Revising the EPA Dilution-Attenuation Soil Screening Model for PFAS.Journal of hazardous materials letters · 2023Article
- Determining air-water interfacial areas for the retention and transport of PFAS and other interfacially active solutes in unsaturated porous media.The Science of the total environment · 2023Article
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Authors and funding
5 authors at 2 institutions in 2 countries.
Funding
Abstract
The impact of chain length on air-water interfacial adsorption of perfluorocarboxylic acids (PFCAs) during transport in unsaturated quartz sand was investigated. Short-chain (C4-C7: PFBA, PFPeA, PFHxA, PFHpA) and long chain (C8-C10: PFOA, PFNA, PFDA) PFCAs were selected as a representative homologous series. Surface tensions were measured to characterize surface activities of the selected PFCAs. Miscible-displacement column experiments were conducted for each of the PFCAs to characterize the magnitudes of air-water interfacial adsorption under transport conditions. The transport of the long-chain PFCAs exhibited greater retardation than the short-chain PFCAs. Air-water interfacial adsorption (AWIA) was the predominant source of retention (≥63%) for the long-chain PFCAs. Conversely, AWIA contributed less to retention than did solid-phase sorption for the short-chain PFCAs, with the former contributions ranging from 4% to 40%. Direct examination of the breakthrough-curve profiles as well as mathematical-modeling results demonstrated that transport of the two longest-chain PFCAs was influenced by nonlinear AWIA, whereas that of the shorter-chain PFCAs was not. This disparate behavior is consistent with the input concentration used for the transport experiments in comparison to the respective surface activities and critical reference concentrations of the different PFCAs. Quantitative-structure/property-relationship (QSPR) analysis was applied to characterize the influence of molecular size on air-water interfacial adsorption. The logs of the air-water interfacial adsorption coefficients (K
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