Practical limits of current technologies in removing per- and polyfluoroalkyl substances from fire suppression systems.

Autor: Nguyen D; CDM Smith, 14432 SE Eastgate Way, #100, Bellevue, WA, USA. Electronic address: NguyenDD@cdmsmith.com., Bellona C; Colorado School of Mines, 1500 Illinois Street, Golden, CO, USA., Lau A; Colorado School of Mines, 1500 Illinois Street, Golden, CO, USA., Stults J; CDM Smith, 14432 SE Eastgate Way, #100, Bellevue, WA, USA., Andrews H; Manchester Metropolitan University, Chester Street, Manchester M1 5GD, UK., Jones D; Manchester Metropolitan University, Chester Street, Manchester M1 5GD, UK., Megson D; Manchester Metropolitan University, Chester Street, Manchester M1 5GD, UK; Chemistry Matters, Calgary, Alberta, Canada., Ross I; CDM Smith, 220 Montgomery Street, #1418, San Francisco, CA, USA.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2024 Nov 17; Vol. 481, pp. 136551. Date of Electronic Publication: 2024 Nov 17.
DOI: 10.1016/j.jhazmat.2024.136551
Abstrakt: Several commercial products have been broadly marketed for their effectiveness in removing residual PFAS from AFFF-impacted fire suppression systems. However, a comprehensive assessment of their effectiveness in mitigating long-term PFAS rebound following the initial cleaning has not been reported. Herein, batch and flow-through experiments were conducted to interrogate the overall effectiveness of four different cleaning solutions in removing residual PFAS from AFFF-impacted stainless steel pipes from a fire suppression system. Advanced surface imaging techniques were also employed to correlate with bench-scale testing results and to provide insights into potential PFAS rebound mechanisms. Results presented herein demonstrate that complete removal of PFAS from AFFF-impacted fire suppression systems is extremely difficult to achieve for all four cleaning solutions examined in this study. The PFAS rebound behavior observed was likely attributable to PFAS supramolecular assemblies accumulating on the pipe surfaces. Because PFAS rebound following cleanout of AFFF-impacted fire suppression systems is likely inevitable, there needs to be an understanding of the practical limits to which impacted fire suppression system cleanout can be achieved. Improved insights into the dissolution mechanisms and the rate of dissolution of supramolecular formations will be key to improving PFAS decontamination processes and decontamination of materials/equipment impacted by AFFFs.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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