高锰酸钾去除水中TCE的研究 |
摘要点击 2788 全文点击 2726 投稿时间:2008-09-11 修订日期:2009-03-23 |
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中文关键词 高锰酸钾 三氯乙烯(TCE) 速率常数 影响因素 反应机制 |
英文关键词 permanganate tetrachloroethylene (TCE) reaction rate constant influence factor reaction mechanism |
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中文摘要 |
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. |
英文摘要 |
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 Kobs was 0.142 9 min-1and the half-life t1/2 was 4.85 min.The reaction rate constant of TCE was increased with increase of KMnO4 concentration and temperature, and almost not affected by pH and ionic strength. |