| 土壤锌污染修复实验研究 |
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| 引用本文： | 胡宏韬,程金平.土壤锌污染修复实验研究[J].环境科学与技术,2009,32(10). |
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| 作者姓名： | 胡宏韬 程金平 |
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| 作者单位： | 1. 上海应用技术学院化工系,上海,200235
2. 上海交通大学环境科学与工程学院,上海,200240 |
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| 基金项目： | 上海市教委重点学科建设项目基金，上海市教委科研创新项目基金 |
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| 摘 要： | 通过实验方法研究了土壤重金属锌污染的电动修复技术,分析了土壤重金属污染物的迁移和变化特征。实验结果表明在电场作用下土壤中重金属的浓度分布发生明显变化,使得大部分重金属能在电极附近富集而被去除,且土壤的pH值等是影响电动力学修复效果的主要因素。污染物Zn在电场作用下主要是在阴极附近产生富集,迁移方向由阳极向阴极,当实验电压为0.5V/cm时,在阳极附近土壤中锌的去除效率达到74.3%。电动修复中由于两极的氧化还原反应造成电极附近pH值产生明显变化,阳极附近的pH值由开始时的6.7逐渐变小到4.8,而阴极附近则相反,由开始时的6.8逐渐增大到9.2,表明土壤的酸性碱性条件变化明显。此外电动修复过程中电极附近的温度会发生相应的变化。
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| 关 键 词： | 土壤污染 重金属 电动修复 影响因素 pH值 |
Experimental Study on Electrokinetic Remediation of Zinc Contaminated Soils |
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| HU Hong-tao,CHENG Jin-ping.Experimental Study on Electrokinetic Remediation of Zinc Contaminated Soils[J].Environmental Science and Technology,2009,32(10). |
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| Authors: | HU Hong-tao CHENG Jin-ping |
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| Institution: | 1.Department of Chemical Engineering;Shanghai Institute of Technology;Shanghai200235;China;2.School of Environmental Science and Engineering;Shanghai Jiaotong University;Shanghai200240;China |
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| Abstract: | Electrokinetic remediation technique of soil contaminated by heavy metal zinc was studied by means of experiment for remediation of soil contaminated by typical heavy metal,and characteristics and mechanism for distribution and migration of heavy metals were analyzed as well.Results indicated that the concentrations of heavy metal changed obviously in soil in electric field and most of which can be enriched and removed in the vicinity of electrodes.pH value in soil was main factor that affected the effect o... |
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| Keywords: | soil pollution heavy metal electrokinetic remediation affecting factor pH value |
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