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生物固体结合的PFAS的命运通过热解与热氧化相结合,用于控制空气排放

Lloyd J Winchell¹, Joshua Cullen², John J Ross¹

¹Brown and Caldwell, Walnut Creek, California, USA.

Water environment research : a research publication of the Water Environment Federation

|November 13, 2024

概括

热解和热氧化有效地减少废水固体中的多和多基物质 (PFAS). 这种综合系统实现了99%以上的PFAS清除,而较短的链条占据了剩余的排放量.

科学领域:

环境工程环境工程
化学工程是化学工程的重要组成部分.
环境化学环境化学

背景情况:

和多基基物质 (PFAS) 是废水固体中的持久污染物.
热解是一种潜在的热处理方法,用于破坏PFAS,但废气排放仍然令人担忧.

研究的目的:

为了记录PFAS在实验室规模的热解和废气的热氧化过程中的命运.
量化组合系统在降低PFAS度方面的效率.

主要方法:

一个实验室规模的热解装置被用于处理含有PFAS的废水固体.
来自 pyrolyzer 的废气被使用合热氧化剂处理.
进行了有针对性的分析,以确定特定化合物的PFAS减少效率和整体系统性能.

主要成果:

热解和热氧化器系统的组合实现了99.4%的总PFAS的减少.
单个化合物的减少率从91.5%到超过99.9%不等.
短链PFAS构成了热氧化器烟气中剩余PFAS的大多数 (54.4%79.5%),这表明长链化合物被分解了.

结论:

热氧化是一种可行的技术,用于处理热生物固体处理过程中的废气,显著减少PFAS排放.
该系统有效降解长链PFAS,但需要对潜在的重组PFAS形成和部分分解进行研究.

关键词:

在PFAS中,有很多方法.生物固体是一种生物固体.热解是一种热解过程.热氧化剂是一种热氧化剂.废水是废水,废水就是废水.

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