The present work focused on analyzing the effects of solar energy on the electrokinetic remediation (EKR) of Cr-contaminated soil, compared to direct current (DC) power supply. Meanwhile, to control the remedied soil pH and focusing phenomena, the exchange electrode-EKR (EE-EKR) has also been employed. Four runs of tests were conducted using DC power supply with the conventional EKR (run A, run D), DC power supply with EE-EKR (run B) and solar energy with EE-EKR (run C) respectively. Important electrokinetic parameters such as electrical voltage and current, electroosmotic flow, soil pH, the remediation efficiency of total Cr, Cr(VI), Cr(III) and cost analysis were investigated to evaluate EE-EKR using solar energy. The results show that run B had the highest removal efficiency of total Cr (43.65%), Cr(VI) (91.88%), and Cr(III) (19.32%), and run C, run A, run D follow in turn. It was proved that EE-EKR could increase the removal efficiency of Cr, especially Cr(III) from contaminated soil, because it could reduce focusing phenomena and enhance electrical current. Meanwhile, the experimental results also indicated that the combination of electrokinetics and solar energy was feasible and effective to some extent for the remediation of Cr-contaminated soil.

与直流（DC）电源相比，本工作着重于分析太阳能对Cr污染土壤的电动修复（EKR）的影响。同时，为了控制土壤的修复pH值和聚焦现象，还使用了交换电极EKR（EE-EKR）。分别使用带有常规EKR的直流电源（运行A，运行D），带有EE-EKR的直流电源（运行B）和带有EE-EKR的太阳能电源（运行C）进行了四轮测试。研究了重要的电动参数，例如电压和电流，电渗流量，土壤pH，总Cr，Cr（VI），Cr（III）的修复效率以及成本分析，以评估利用太阳能的EE-EKR。结果表明，实验B去除总Cr最高，总铬（43.65％），Cr（VI）（91.88％）和Cr（III）（19.32％）最高，而实验C，依次运行A，D。事实证明，EE-EKR可以减少污染的现象并增加电流，从而提高了Cr，特别是Cr（III）从污染土壤中的去除效率。同时，实验结果还表明，电动和太阳能的结合在一定程度上对铬污染土壤的修复是可行和有效的。