过碳酸盐在 Fe(2+)-催化水溶液中氧化全氯乙烯（PCE）：PCE 的性能及其去除机制。
Perchloroethylene (PCE) oxidation by percarbonate in Fe(2+)-catalyzed aqueous solution: PCE performance and its removal mechanism.
机构信息
State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
出版信息
Chemosphere. 2015 Jan;119:1120-1125. doi: 10.1016/j.chemosphere.2014.09.065. Epub 2014 Oct 15.
The performance of Fe(2+)-catalyzed sodium percarbonate (SPC) stimulating the oxidation of perchloroethylene (PCE) in groundwater remediation was investigated. The experimental results showed that PCE could be completely oxidized in 5 min at 20 °C with a Fe(2+)/SPC/PCE molar ratio of 8/8/1, indicating the effectiveness of Fe(2+)-catalyzed SPC oxidation for PCE degradation. Fe(2+)-catalyzed SPC oxidation was suitable for the nearly neutral pH condition, which was superior to the conventional Fenton oxidation in acidic condition. In addition, the investigations by using hydroxyl radical scavengers and free radical probe compounds elucidated that PCE was degraded mainly by hydroxyl radical (HO) oxidation in Fe(2+)/SPC system. In conclusion, Fe(2+)-catalyzed SPC oxidation is a highly promising technique for PCE-contaminated groundwater remediation, but more complex constituents in groundwater should be carefully considered for its practical application.
研究了 Fe(2+)-催化过碳酸钠（SPC）刺激地下水修复中全氯乙烯（PCE）氧化的性能。实验结果表明，在 20°C 下，Fe(2+)/SPC/PCE 的摩尔比为 8/8/1 时，PCE 可在 5 分钟内完全氧化，表明 Fe(2+)-催化 SPC 氧化对 PCE 降解的有效性。Fe(2+)-催化 SPC 氧化适用于近中性 pH 条件，优于传统的酸性条件下的芬顿氧化。此外，通过使用羟基自由基清除剂和自由基探针化合物的研究表明，在 Fe(2+)/SPC 体系中，PCE 主要通过羟基自由基（HO）氧化降解。总之，Fe(2+)-催化过碳酸钠氧化是一种很有前途的修复受 PCE 污染地下水的技术，但在实际应用中应仔细考虑地下水更复杂的成分。
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