中文摘要：

以铁屑和活性炭构建的原电池研究不同电极间距下高岭土中的镉在原电池电场下的电动力学迁移，随着反应时间的延长，电压和电流均逐渐减小。反应后，高岭土的pH值从阳极到阴极逐渐增加，高岭土中镉含量从阳极向阴极逐渐增加，镉的去除率随电极间距的增加而降低，高岭土的pH值愈低镉的迁移效果愈明显,10cm的电极间距高岭土中镉的去除率达77．9％，在50cm的电极间距下镉的迁移作用很小,表明利用铁炭原电池产生的电场可以驱动污染高岭土中镉的电动力学迁移。

英文摘要：

The electromigration of Cd in contaminated kaolin soil by an iron （Fe） and activated char （ C ） primary cell. Anode and cathode compartments were filled with 0. 2 mol·1^-1 HC1. The effect of the distance between Fe and C on the electromigration of Cd was researched. The voltage produced was about 1.0 V. Electric current declined with the increase of the distance of electrodes. With the increase of operation time, the voltage and electric current both gradually decreased. At the end of experiments, pH and Cd content increased gradually from anode to cathode. Eletromigration efficiencies declined with the increased distance between elec- trodes. Lower pH led to greater electromigration efficiency. The eletromigration efficiency was up to 77.9% when the distance between electrodes was 10 cm and was negligible when the distance was 50 cm. It was feasible using the primary cell to drive the electromigration of cadmium in contaminated kaolin soil.