The Remediation of Perchloroethylene Contaminated Groundwater by Nanoscale Iron Reactive Barrier Integrated with Surfactant and Electrokinetics
The Remediation of Perchloroethylene Contaminated Groundwater by Nanoscale Iron Reactive Barrier Integrated with Surfactant and Electrokinetics
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DOI：
10.1111/j.1745-6592.2010.01311.x
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发表时间：
2010-09-01
影响因子：
1.9
通讯作者：
Kuo, Tzu-Yen
中科院分区：
文献类型：
--
作者：
Chen, Shin-Shian;Huang, Yi-Chu;Kuo, Tzu-Yen
在这项研究中，纳米零价铁（NZVI）颗粒的合成和利用集成与表面活性剂和电动修复四氯乙烯（PCE）。实验室合成的铁颗粒的平均粒径和比表面积分别为109.3 nm和129.7 m2 g-1。在玻璃砂箱中进行实验，模拟四氯乙烯在含水层中的迁移和降解。迁移试验结果表明，PCE在底层的浓度高于中、上层，表面活性剂吐温80对PCE在含水层中的迁移有明显的促进作用。降解试验结果表明，电动力学可促进NZVI活性，从而提高NZVI反应屏障对PCE污染地下水的修复效果。在降解试验中没有检测到氯化副产物，即PCE在反应性屏障中被NZVI完全脱氯。本研究所收集的信息将有助于进一步应用NZVI反应屏障系统修复受氯化溶剂污染的含水层。
In this study, nanoscale zero-valent iron (NZVI) particles were synthesized and utilized to integrate with surfactant and electrokinetics for the remediation of perchloroethylene (PCE). The average particle diameter and specific surface area of the lab-synthesized iron particles were 109.3 nm and 129.7 m2 g-1, respectively. Experiments were performed in a glass sandbox to simulate the transport and degradation of PCE in the aquifer. The results of the transport tests revealed that the PCE concentrations at the bottom layer was higher than those at the mid and upper layers, and that the surfactant Tween 80 showed its conspicuous mobilization for PCE in the aquifer. As the results of the degradation tests showed, NZVI activity could be promoted by electrokinetics that enhanced the remediation performance of PCE contaminated groundwater by the NZVI reactive barrier. Chlorinated byproducts were not detected during the degradation tests, that is, PCE was completely dechlorinated by NZVI in the reactive barrier. The information collected from this study will be useful for further application of the NZVI reactive barrier system to remediate the aquifers contaminated by the chlorinated solvents.