Transport of PFOS in aquifer sediment: Transport behavior and a distributed-sorption model
Open accessAbstract
The objectives of this research were to examine the transport of perfluorooctane sulfonic acid (PFOS) in aquifer sediment comprising different geochemical properties, and to compare the behavior to that observed for PFOS transport in soil and sand. PFOS retardation was relatively low for transport in all aquifer media. The PFOS breakthrough curves were asymmetrical and exhibited extensive concentration tailing, indicating that sorption/desorption was significantly nonideal. The results of model simulations indicated that rate-limited sorption/desorption was the primary cause of the nonideal PFOS transport. Comparison of PFOS transport in aquifer media to data reported for PFOS transport in two soils and a quartz sand showed that PFOS exhibited more extensive elution tailing for the soils, likely reflecting differences in the relative contributions of various media constituents to sorption. A three-component distributed-sorption model was developed that accounted for contributions from soil organic carbon, metal oxides, and silt + clay fraction. The model produced very good predictions of K d for the five media with lower soil organic‑carbon contents (≤0.1%). Soil organic carbon was estimated to contribute 19-42% of the total sorption for all media except the sand, to which it contributed ~100%. The contribution of silt + clay ranged from 51 to 80% for all media except the sand. The only medium for which the contribution of metal-oxides was significant is Hanford, with an estimated contribution of 15%. Overall, the results of the study indicate that sorption of PFOS by these aquifer media comprised contributions from multiple soil constituents.
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Wang and co-workers derived silt+clay normalized sorption coefficients using a three-compartment distribution model to account for the contribution of the mineral fraction to the overall K_d.
“Indeed, Wang and co-workers derived silt+clay normalized sorption coefficients using a three-compartment distribution model to account for the contribution of the mineral fraction to the overall K d (Wang et al., 2021).”
From Modelling the sorption behaviour of perfluoroalkyl carboxylates and perfluoroalkane sulfonates in soils (2021) · cites this paper as Wang et al., 2021
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Cites
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- Authors
- Wang, Y., Khan, N., Huang, D., Carroll, K. C., & Brusseau, M. L.
- Affiliations
- University of Arizona (US)
- New Mexico State University (US)
- Corresponding author
- Brusseau, Mark L.
- Venue
- Science of The Total Environment
- Publisher
- Elsevier BV
- Published
- 2021-07
- Volume
- 779
- Pages
- 146444
- ISSN
- 0048-9697 (ISSN-L)
- PMC
- PMC8565396
- OpenAlex
- W3135930702
- Cited by
- 53
- References
- 5
- Citations by year
- 2026: 7 · 2025: 10 · 2024: 13 · 2023: 9 · 2022: 7 · 2021: 7
- FWCI
- 3.41
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- www.elsevier.com/tdm/userlicense/1.0/ (tdm)
- www.elsevier.com/legal/tdmrep-license (tdm)
- www.elsevier.com/open-access/userlicense/1.0/ (am, 258 d)
- doi.org/10.15223/policy-017 (stm-asf)
- doi.org/10.15223/policy-037 (stm-asf)
- doi.org/10.15223/policy-012 (stm-asf)
- doi.org/10.15223/policy-029 (stm-asf)
- doi.org/10.15223/policy-004 (stm-asf)
- Locations
- The Science of The Total Environment (acceptedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institute of Environmental Health Sciences
- Topics
- Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
- Physical Sciences › Environmental Science › Environmental Engineering › Groundwater flow and contamination studies
- Physical Sciences › Environmental Science › Pollution › Pesticide and Herbicide Environmental Studies
- Keywords
- PFOS, aquifer sediments, contaminant retardation, breakthrough curves, rate-limited sorption, soil organic carbon, metal oxides, silt and clay fractions, sorption coefficient, Hanford Site
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