About this Environmental Science article
Influence of grain size, organic carbon and organic matter residue content on the sorption of per- and polyfluoroalkyl substances in aqueous film forming foam contaminated soils - Implications for remediation using soil washing by Michel Hubert; Hans Peter H. Arp; Mona Cecilie Hansen; Gabriela Castro; Thomas Meyn; Alexandros G. Asimakopoulos; Sarah E. Hale is a Environmental Science article available to read on EtoBox.
A soil that was historically contaminated with Aqueous Film Forming Foam (AFFF) was dry sieved into size fractions representative of those produced during soil washing. Batch sorption tests were then conducted to investigate the effect of soil parameters on in situ per-and polyfluoroalkyl substances (PFAS) sorption of these different size fractions: < 0.063 mm, 0.063 to 0.5 mm, 0.5 to 2 mm, 2 to 4 mm, 4 to 8 mm, and soil organic matter residues (SOMR). PFOS (513 ng/g), 6:2 FTS (132 ng/g) and PFHxS (58 ng/g) were the most dominant PFAS in the AFFF contaminated soil. Non-spiked, in situ K d values for 19 PFAS ranged from 0.2 to 138 L/Kg (log K d -0.8 to 2.14) for the bulk soil and were dependant on the head group and perfluorinated chain length (spanning C 4 to C 13 ). The K d values increased with decreasing grain size and increasing organic carbon content (OC), which were correlated to each other. For example, the PFOS K d value for silt and clay (< 0.063 mm, 17.1 L/Kg, log K d 1.23) were approximately 30 times higher compared to the gravel fraction (4 to 8 mm, 0.6 L/Kg, log K d -0.25). The highest PFOS K d value (116.6 L/Kg, log K d 2.07) was found for the SOMR fraction, which had
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- Author
- Michel Hubert; Hans Peter H. Arp; Mona Cecilie Hansen; Gabriela Castro; Thomas Meyn; Alexandros G. Asimakopoulos; Sarah E. Hale
- Publisher
- Elsevier BV
- Published
- 2023
- Language
- EN
- Field
- Environmental Science (Physical Sciences)