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Analysis of per-and polyfluoroalkyl substances(PFAs)extraction from contaminated firefighting materials:Effects of cleaning agent,temperature,and chain-length dependencies

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Emerging Contaminants 2024年第3期10卷 268-279页

作者： s.xten dahlbom Fanny Bjarnemark Bjorn Nguyen sarunas Petronis Tove Mallin RIsE Research Institute of sweden Division Safety and TransportFire and Safety DepartmentBox 85750115BoråsSweden RIsE Research Institute of sweden Division Materials and ProductionChemistry and Applied Mechanics DepartmentBox 85750115BoråsSweden RIsE Research Institute of sweden Division Materials and ProductionMethodologyTextiles and Medical Technology DepartmentBox 85750115BoråsSweden

This investigation delves into the extraction dynamics of 22 per-and polyfluoroalkyl substances from PFAs contaminated firefighting *** distinct test sets were executed:one contrasting a commercial product with water following an elaborate decontamination procedure,and the other assessing seven washing agents on materials from firefighting installations,with one agent examined at 22℃and 50℃.A general tendency for improved desorption at the higher temperature was ***,a discernible influence of the cleaning agent's pH on the extraction of specific PFAs species was observed,elucidating the role of chemical environment in the extraction *** rebound was studied for a period of up to 157 days,this unveiled a gradual escalation in PFAs22 levels,indicative of a protracted desorption ***,PFAs with abbreviated carbon chains(C4-C6)exhibit superior desorption efficiency compared to their elongated congeners,suggesting a chain-lengthdependent decontamination potential.A comparative scrutiny between a commercially available cleaning product,featuring multiple washing and flushing steps,and a water-only treatment regimen underscores the potential efficacy of the *** exhaustive investigation furnishes nuanced insights into PFAs extraction complexities,offering a foundation for informed decontamination strategies.

关键词： PFAs Decontamination Firefighting foam Firefighting materials Cleaning

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