Comprehensive adsorption behavior and mechanism of PFOA and PFCs in various subsurface systems in China

Evaluation of the Transformation and Leaching Behavior of Two Polyfluoroalkyl Phosphate Diesters in a Field Lysimeter Study

“…Only PFOA as the longest detected PFCA showed elevated levels (23.7−99.9 μg/kg DM) in all soil layers due to its high migration retardation in the soil. 42 Compared to the diPAP content in the soil of the 6:2 diPAP variant, it is noticeable that the 8:2 diPAP content at the end of the experiment was higher than the 6:2 diPAP content despite the same application concentration (2 mg/kg DM).…”

Monitoring the adsorption of per- and polyfluoroalkyl substances on carbon black by LDI-MS capable of simultaneous analysis of elemental and organic carbon

“…4d). 42,43 Therefore, the adsorption rate of PFASs is closely dependent on their hydrophobicity, again indicating that hydrophobic interaction dominates the sorption of PFASs to CB in water, which was affected by the functional groups and carbon chain length of PFASs.…”

Selecting sustainable approach for remediation of PFOA contaminated soils: AHP decision-making

“…Multiple PFASs have been identi ed in samples of human blood (Loi et al, 2013;Zhu et al, 2022) and, not only levels of per uorooctanoic acid (PFOA) were much higher than almost all other PFASs (Xiao et al, 2015), but also during the national survey of U.S. this substance was identi ed in over ninety-ve percent of blood samples (Liu et al, 2021). Therefore, PFOA attracted worldwide attention in the context of risk analysis (Wan et al, 2022).…”

“…2, PFOA (C 8 HF 15 O 2 ) is a long-chain amphiphilic PFAS with a strong carbon-uorine bond and a molecular weight of 414.07 gr (Xiao et al, 2015;Yao et al, 2013). Its outstanding chemical and physical properties, including hydrophobicity, oleophobicity, and extraordinary chemical stability (Gong et al, 2016;Li et al, 2012;Loos et al, 2008), has led to its widespread use in polymerization aids (Yao et al, 2013), fast-food containers, water-resistant clothing, aqueous re-ghting foams, painting materials, stain-resistant carpeting, surfactant, lubricants, wetting agents (Liu et al, 2021;Paul et al, 2009). Therefore PFOA can come from a variety of sources, including aqueous lm-forming foams (Hodgkins et al, 2019;Houtz et al, 2013;Turner et al, 2021), land ll of PFOAs-containing wastes (Sepulvado et al, 2011), water and wastewater treatment plant sludge, biosolids or composts on agricultural lands (Jho et al, 2015;Röhler et al, 2021;Zhu et al, 2022), atmospheric wet deposition and manufacturing industries (Hou et al, 2022;Kewalramani et al, 2022; ).…”