用PFAS污染的灭火系统管道的净化和表面分析:清洁剂和温度的影响
Björn Bonnet1, Matthew K Sharpe2, Gulaim Seisenbaeva3
1Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala 75651, Sweden.
Environmental science & technology
|January 23, 2025
概括
这项研究调查了从不钢管道中去除化物质和多化物质 (PFAS) 的情况. 在70°C时使用20%的丁碳醇溶液是最有效的,但残留的PFAS仍然存在,构成污染风险.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
背景情况:
- 和多醇基物质 (PFAS) 是消防泡中发现的持久污染物.
- 基础设施中的PFAS污染,特别是不钢管道,需要有效的净化策略.
- 目前的研究缺乏全面的PFAS清除和处理效率评估方法.
研究的目的:
- 评估不同清洁剂和温度的有效性,以从不钢管道表面去除PFAS.
- 用飞行时间弹性反弹探测 (ToF-ERD) 和燃烧离子色谱来评估处理效率.
- 识别残留PFAS并了解它们在管道表面的行为.
主要方法:
- 在不同的温度下 (20°C,40°C,70°C) 用各种清洁剂 (自来水,甲醇,10%和20%的丁碳醇溶液) 浸泡不钢管道.
- 使用清洁溶液的有针对性的分析量化PFAS去除.
- 通过燃烧离子色谱分析总含量.
- 使用飞行时间弹性反弹探测 (ToF-ERD) 评估表面含量和PFAS结构.
主要成果:
- 在70°C的20%的丁碳醇 (BC) 溶液中,可从总PFAS (PFAS) 中去除高达40μg/cm2.
- 20%的BC溶液明显比自来水更有效,其清除率高出2至20倍.
- 总分析表明存在多甲基PFAS,在处理后在管道表面检测到残留.
- ToF-ERD揭示了PFAS在内部管道表面上的超分子组合,这表明PFAS可能会反弹.
结论:
- 丁碳醇溶液,特别是在更高的度和温度下,可以有效地从不钢中去除PFAS.
- 尽管有效去除,但表面上的PFAS残留表明未来污染或PFAS反弹的风险.
- 像ToF-ERD这样的先进分析技术对于了解PFAS行为和确保完全清除污染至关重要.
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