Decontamination and Surface Analysis of PFAS-Contaminated Fire Suppression System Pipes: Effects of Cleaning Agents and Temperature DOI Creative Commons

Björn Bonnet,

Matthew K. Sharpe, Gulaim A. Seisenbaeva

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 23, 2025

Per- and polyfluoroalkyl substances (PFAS)-containing firefighting foam have been used in stationary fire suppression systems for several decades. However, there is a lack of research on how to decontaminate PFAS-contaminated infrastructure evaluate treatment efficiency. This study assessed the removal PFAS from stainless steel pipe surfaces using different cleaning agents (tap water, methanol, aqueous solutions containing 10 20 wt % butyl carbitol (BC)) at temperatures (20 °C, 40 70 °C). The content remaining fluorine (F)-containing compounds was evaluated first time time-of-flight elastic recoil detection (ToF-ERD). results showed that 20% BC solution heated °C removed up μg/cm2 ∑PFAS via soaking (targeted analysis). Treatment with 2- 8-fold more effective than tap water 10- 20-fold °C. Total analysis determined by combustion ion chromatography higher F-equivalent compared targeted after treatment, indicating presence significant amount PFAS. Surface ToF-ERD confirmed partial F throughout consecutive intervals, residual leaving risk rebound into F-free foams. Furthermore, supramolecular assemblies least PFOS molecules/nm2 were identified interior surfaces.

Language: Английский

Decontamination and Surface Analysis of PFAS-Contaminated Fire Suppression System Pipes: Effects of Cleaning Agents and Temperature DOI Creative Commons

Björn Bonnet,

Matthew K. Sharpe, Gulaim A. Seisenbaeva

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 23, 2025

Per- and polyfluoroalkyl substances (PFAS)-containing firefighting foam have been used in stationary fire suppression systems for several decades. However, there is a lack of research on how to decontaminate PFAS-contaminated infrastructure evaluate treatment efficiency. This study assessed the removal PFAS from stainless steel pipe surfaces using different cleaning agents (tap water, methanol, aqueous solutions containing 10 20 wt % butyl carbitol (BC)) at temperatures (20 °C, 40 70 °C). The content remaining fluorine (F)-containing compounds was evaluated first time time-of-flight elastic recoil detection (ToF-ERD). results showed that 20% BC solution heated °C removed up μg/cm2 ∑PFAS via soaking (targeted analysis). Treatment with 2- 8-fold more effective than tap water 10- 20-fold °C. Total analysis determined by combustion ion chromatography higher F-equivalent compared targeted after treatment, indicating presence significant amount PFAS. Surface ToF-ERD confirmed partial F throughout consecutive intervals, residual leaving risk rebound into F-free foams. Furthermore, supramolecular assemblies least PFOS molecules/nm2 were identified interior surfaces.

Language: Английский

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