| 电流密度控制对土壤Cd和Pb动电过程的影响 |
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| 引用本文： | 林君锋,王果,李玉林.电流密度控制对土壤Cd和Pb动电过程的影响[J].现代农业科技,2010(20):279-282. |
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| 作者姓名： | 林君锋 王果 李玉林 |
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| 作者单位： | 福建农林大学资源与环境学院;福州大学环境与资源学院; |
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| 摘 要： | 以重金属Cd和Pb污染土壤为研究对象,研究固定电流密度对Cd和Pb在土壤中的动电过程的影响。结果表明:电流密度的大小直接影响土壤pH值降低程度,但土壤pH值的突跃点与电流密度大小关系不大;运行总电压和土壤层温度随电流密度的增加而升高。在固定电流密为1.06 mA/cm2时控制阴阳电极液的pH值,在阳极加入氢氧化钠在阴极加入柠檬酸钠进行调节,结果明显改变了动电过程中的运行总电压、土壤层pH值和温度;该试验条件下,整体土壤层中有效态Cd(Ⅱ)和Pb(Ⅱ)的去除率分别为95.6%和48.4%。
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| 关 键 词： | 电流密度 动电过程 污染土壤 Cd和Pb |
Effect of Current Density Control on Electrokinetic Process of Cadmium and Lead in Soil |
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| Authors: | LIN Jun-feng WANG Guo LI Yu-lin |
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| Institution: | LIN Jun-feng 1 WANG Guo 1 LI Yu-lin 2(1 College of Resource and Environment,Fujian Agriculture and Forestry University,Fuzhou Fujian 350002,2 College of Environment and Resourse,Fuzhou University) |
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| Abstract: | oil contaminated by cadmium and lead was researched to examine the effect of fixed current density control on cadmium and lead electrokinetic process in soil.The results indicated that the current density decided the decreased degree of pH in soil,whereas the points of pH break weren’t related to the current density.The running total voltage and temperature in soil hoisted as the current density increased.For the running total voltage,the pH and temperature in soil were changed obviously on application of 1.06 mA/cm2 fixed current density and adding of sodium hydroxide in anode solution and citric acid in cathode.In these test conditions removal efficiencies of available,cadmium(Ⅱ)and lead(Ⅱ)in the whole soil horizon were 95.6% and 48.4% respectively. |
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| Keywords: | current density electrokinetic process contaminated soil cadmium and lead |
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