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通过电动力学过程与活性炭/铁涂层活性炭相结合,从高岩土壤中修复PFOA - 透式反应屏障

Namuun Ganbat¹, Ali Altaee², Faris M Hamdi²

¹Centre for Green Technology, School of Civil and Environmental Engineering, University of Technology Sydney, 15 Broadway, NSW 2007, Australia; Photon Remediation, 219-241 Cleveland, St Redfern, NSW 2016, Australia.

Journal of contaminant hydrology

|September 8, 2024

概括

电动力学 (EK) 整治有效地使用生物表面活性剂和透反应障碍物 (PRB) 从土壤中去除了 perfluorooctanoic acid (PFOA). 铁涂装活性炭 (FeAC) PRBs在现场显示出更高的PFOA去除效率.

科学领域:

环境工程环境工程
土壤科学土壤科学
整治技术整治技术

背景情况:

perfluorooctanoic 酸 (PFOA) 是一种持久的环境污染物.
现场土壤整治对于管理受污染的地点至关重要.
电动力学 (EK) 过程为清除土壤污染物提供了潜在的解决方案.

研究的目的:

为了研究PFOA去除的现场电动力学 (EK) 土壤修复的有效性.
评估酸盐生物表面活性剂与活性炭 (AC) 和铁涂层活性炭 (FeAC) 透反应屏障 (PRB) 结合的性能.
评估PRB放置对EK过程效率对PFOA修复的影响.

主要方法:

在加PFOA的考利尼特土壤上应用EK处理.
使用酸盐生物表面活性剂与AC和FeACPRBs.
在EK系统中调查不同的PRB位置 (中间和阳极).
使用甲醇再生使用的PRB用于PFOA提取和再利用.

主要成果:

在中间部分使用AC和FeAC PRB进行EK治疗,分别实现了52.35%和59.55%的PFOA去除.
FeAC PRB显示了更高的PFOA去除效率,而阴极附近的积累归因于铁-PFOA复杂化.
经过再生的PRB显示效率降低 (40.37%的AC-EK,20.62%的FeAC-EK).
在阳极附近使用FeAC PRB的EK导致21.96%的PFOA被去除.

结论:

将PRB与EK工艺相结合,可以显著提高PFOA的现场土壤修复效率.
FeAC PRB显示了改善PFOA去除的希望,尽管再生会影响性能.
这项研究强调了在现场进行土壤修复以消除PFAS等持久化学物质的可行性.
这种方法为污染土壤中的"永久化学品"的处理提供了一个可行的策略.

关键词:

电动力学电动力学电动力学在PFOA的修复中,PFOA的修复.土壤去污染土地去污染增强表面活性剂的增强作用

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