Perchloroethylene (PCE) oxidation by percarbonate in Fe2+-catalyzed aqueous solution: PCE performance and its removal mechanism

被引：70

作者：

Miao, Zhouwei ^{[1
]}

Gu, Xiaogang ^{[1
]}

Lu, Shuguang ^{[1
]}

Zang, Xuke ^{[1
]}

Wu, Xiaoliang ^{[1
]}

Xu, Minhui ^{[1
]}

Ndong, Landry Biyoghe Bi ^{[1
]}

Qiu, Zhaofu ^{[1
]}

Sui, Qian ^{[1
]}

Fu, George Yuzhu ^{[2
]}

机构：

[1] E China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China

[2] Georgia So Univ, Dept Civil Engn & Construct Management, Statesboro, GA 30460 USA

来源：

CHEMOSPHERE | 2015年 / 119卷

基金：

中国国家自然科学基金;

关键词：

Perchloroethylene (PCE); Percarbonate; Fe2+-catalyzed oxidation; Hydroxyl radical (HO center dot); Groundwater remediation; NONAQUEOUS PHASE LIQUID; ZERO-VALENT IRON; HYDROGEN-PEROXIDE; CARBON-TETRACHLORIDE; FENTONS REAGENT; DEGRADATION; TRICHLOROETHYLENE; DESTRUCTION; TETRACHLOROETHYLENE; HEXACHLOROETHANE;

D O I：

10.1016/j.chemosphere.2014.09.065

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The performance of Fe2+-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 degrees C with a Fe2+/SPC/PCE molar ratio of 8/8/1, indicating the effectiveness of Fe2+-catalyzed SPC oxidation for PCE degradation. Fe-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 center dot) oxidation in Fe2+/SPC system. In conclusion, Fe2+-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. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：1120 / 1125

页数：6

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