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通过高频加热,有效地和快速地修复污染的土壤和多基物质 (PFAS)

Runze Sun¹, Samuel Babalol¹, Ruichong Ni²

¹Department of Civil and Environmental Engineering, The University of Missouri, Columbia, MO 65211, USA.

Journal of hazardous materials

|October 28, 2023

概括

高频加热 (HFH) 快速消毒土壤中含有和多基物质 (PFAS) 和水性薄膜形成泡 (AFFF). 这种新的热技术在几分钟内实现了近乎完整的PFAS降解,而大气释放量最小.

科学领域:

环境科学环境科学
化学工程是化学工程的重要组成部分.
材料科学材料科学材料科学

背景情况:

和多基基物质 (PFAS) 是持久的环境污染物.
水性薄膜形成泡 (AFFF) 是PFAS污染的重要来源.
对于被PFAS污染的场地,迫切需要有效的整治技术.

研究的目的:

评估一种新的高频加热 (HFH) 技术,用于PFAS和AFFF的净化.
使用HFH评估各种PFAS化合物的降解效率和动力学.
调查HFH处理期间气态副产品和PFAS的命运.

主要方法:

在PFAS和AFFF污染的土壤样本上使用高频加热 (HFH).
使用先进的分析技术对PFAS度在处理前后进行分析.
监测气态副产品和水蒸气的潜在PFAS释放情况.

主要成果:

多种 PFAS (短链,长链,前体) 的超快速降解在几分钟内实现.
对 perfluoroalkyl carboxylic 酸,以太 carboxylic 酸和硫酸观察到几乎完全的降解 (>99.9%).
AFFF前体的完全降解,没有可检测的中间产品; PFAS在水蒸气中的损失最小.

结论:

HFH是一种高效和快速的热技术,用于修复PFAS和AFFF污染的土壤.
该技术在各种PFAS类型和土壤矩阵中显示了广泛的适用性.
高氧化为应对广泛的PFAS污染提供了一个有希望的低风险解决方案.

关键词:

能源效率高的热方法.在PFOS系统中,我们可以它们的前身是前体.短链的PFAS是一种简单的PFAS.土壤整治土壤整治土壤整治

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