| 高锰酸钾去除水中TCE的研究 |
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| 引用本文： | 田璐,杨琦,尚海涛,郝春博.高锰酸钾去除水中TCE的研究[J].环境科学,2009,30(9):2570-2574. |
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| 作者姓名： | 田璐 杨琦 尚海涛 郝春博 |
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| 作者单位： | 中国地质大学水资源与环境学院; |
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| 基金项目： | 国家自然科学基金项目(40102027,50578151);;北京市自然科学基金项目(8052017,8092025);;北京市教委校企合作项目(51900265005) |
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| 摘 要： | 以水中常见的氯代烃污染物三氯乙烯(TCE)为目标污染物,以自制的高锰酸钾溶液为氧化剂,探讨了不同条件下高锰酸钾对TCE的去除效果.结果表明,在30℃、高锰酸钾浓度为0.276 g.L-1的条件下,反应时间为30 min时,TCE的去除率就可达到100%.高锰酸钾对TCE的去除符合一级反应动力学方程,速率常数为0.142 9 min-1,半衰期t1/2为4.85 min.TCE的去除速率随高锰酸钾浓度的增大而增大并呈线性关系,随反应温度的升高而增大,受pH值和离子强度的影响较小.
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| 关 键 词： | 高锰酸钾 三氯乙烯（TCE） 速率常数 影响因素 反应机制 |
| 收稿时间： | 2008/9/11 0:00:00 |
| 修稿时间： | 2009/3/23 0:00:00 |
Oxidation of Trichloroethylene in Water with Permanganate |
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| TIAN Lu,YANG Qi,SHANG Hai-tao and SHANG Hai-tao.Oxidation of Trichloroethylene in Water with Permanganate[J].Chinese Journal of Environmental Science,2009,30(9):2570-2574. |
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| Authors: | TIAN Lu YANG Qi SHANG Hai-tao and SHANG Hai-tao |
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| Institution: | Department of Water Resources and Environment;China University of Geosciences;Beijing 100083;China |
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| Abstract: | In order to investigate the removal ability of chlorinated hydrocarbons,the most widely existent pollutant trichloroethylene(TCE) was
chosen as the aim pollutant, and the self-made permanganate solution was chosen as oxidant. When the oxidant concentration was 0.276
g·L~(-1) ,the removal rate of TCE reached 100% at 30℃ within 30 min. The removal of TCE with permanganate followed the pseudo-first order
kinetics with the reaction rate constant K_(obs), was 0.142 9 min~(-1) and the half-life t_(1/2) was 4.85 min. The reaction rate constant of TCE was
increased with increase of KMnO_4 concentration and temperature, and almost not affected by pH and ionic strength. |
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| Keywords: | permanganate tetrachloroethylene (TCE) reaction rate constant influence factor reaction mechanism |
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