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

Stabilization of Pfas-Contaminated Soil with Sewage Sludge- and Wood-Based Biochar Sorbents

“…In general, increase in K d values with increasing CF-chain length was observed, which is in accordance with other studies (Fabregat-Palau et al, 2022;Higgins and Luthy, 2006;Hubert et al, 2023;Krahn et al, 2023;Sigmund et al, 2022;Sörengård et al, 2020) and caused by the high free energy required for cavity formation per CF 2 moiety in water, making it more energetically favourable to adsorb to the biochar surface.…”

“…DWSS: 4.10 ± 0.11 < 4.83 ± 0.13 < 5.22 ± 0.52, respectively. A similar order of increasing K d values (PFOS <8:2 FTS < PFOSA) was reported by Hubert et al (2023). These authors suggested that the stronger sorption of the telomeric functional head group could be explained by its weaker negative charge, compared to that of the sulfonic acid.…”

“…Standard calibration solutions spanned from 0.01 to 100 μg/L. The internal standard method and matrix-matched calibration standards (see Hubert et al (2023)) were used to quantify PFAS concentrations and to assure greater accuracy in the measurements in addition to compensating for losses during sample preparation and analytical errors as matrix effects and losses during the extraction.…”

Sorption of per- and poly-fluoroalkyl substances and their precursors on activated carbon under realistic drinking water conditions: Insights into sorbent variability and PFAS structural effects

“…This trend can be attributed to differences in electron withdrawal between sulfonate and carboxylate groups, influencing the hydrophobic properties of perfluoroalkyl chains in both molecular and ionized forms [ 45 ]. Similarly, previous studies have also indicated stronger interactions between long-chain PFAS and sulfonated head groups on granular activated carbon (GAC) surfaces compared to PFAS with carboxylic acid heads [ 46 , 47 ].

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Migration and remediation of typical contaminants in soil and groundwater: A state of art review

“…When contaminants are readily migrated in soil and groundwater, they can be immobilized to reduce their mobility and availability, thereby curbing the spread of contaminants to other areas (Hou, 2022; Padhye et al, 2023). However, when contaminants tend to remain on‐site, they can be further degraded and eliminated through soil washing and techniques (Hubert et al, 2023; Zhou et al, 2023). However, the choice of remediation methods depends on the type of contaminant, the environmental behavior, and the expected remediation results (Bolan et al, 2014; Kumar, Yadav, et al, 2021).…”