| 阴极pH控制对电动修复Cr(Ⅵ)污染高岭土影响研究 |
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| 引用本文： | 陈锋,王业耀,孟凡生,汪群慧. 阴极pH控制对电动修复Cr(Ⅵ)污染高岭土影响研究[J]. 环境科学与技术, 2007, 30(6): 35-36,41 |
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| 作者姓名： | 陈锋 王业耀 孟凡生 汪群慧 |
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| 作者单位： | 1. 中国环境科学研究院,北京,100012
2. 北京科技大学土木与环境工程学院,北京,100083 |
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| 摘 要： | 试验选用重铬酸钾作为污染物,配制高岭土中Cr(Ⅵ)初始质量分数为100mg/kg和500mg/kg。试验研究了对阴极电解产生的OH-的控制对电动修复效率的影响以及不同的控制方式对电动修复效率的影响。试验结果表明:对阴极电解产生的pH进行控制可以明显提高Cr(Ⅵ)去除效率;多种控制方式中,以盐酸的中和控制最为有效,可使去除效率达到90.8%,但引起的土壤酸化问题应当进一步进行研究。
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| 关 键 词： | 电动修复 六价铬 污染 土壤 |
| 文章编号： | 1003-6504（2007）06-0035-03 |
| 修稿时间： | 2006-06-122006-11-01 |
Effect of pH Control at Cathode for Electrokinetic Removal of Cr (Ⅵ) from Kaolin |
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| CHEN Feng,WANG Ye-yao,Meng Fan-sheng,WANG Qun-hui. Effect of pH Control at Cathode for Electrokinetic Removal of Cr (Ⅵ) from Kaolin[J]. Environmental Science and Technology, 2007, 30(6): 35-36,41 |
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| Authors: | CHEN Feng WANG Ye-yao Meng Fan-sheng WANG Qun-hui |
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| Abstract: | Electrokinetic remediation of chromium polluted kaolin at laboratory scale was studied. Potassium dichromate was chosen as pollutant and the initial concentration was 100mg/kg kaolin and 500mg/kg kaolin. The effect of pH control at cathode for electrokinetic removal of Cr(VI) from kaolin soil was studied, results indicated that pH control at cathode can improve the removal efficiency of hexavalent chromium from kaolin significantly. Neutralizing OH- resulted from the electroanalysis of cathode with hydrochloric acid was the most effective method, with removal efficiency of hexavalent chromium up to 90.8%, but it is necessary to prevent acidification of soil. |
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| Keywords: | electrokinetic remediation hexavalent chromium pollution soil |
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