High energy consumption is one of the major setbacks of electrokinetic remediation (EKR) of contaminated soils. This study investigated the effect of bentonite/clay ratio, pulse duty cycle and voltage gradient on pulsed electrokinetic remediation (PEKR) of Cu and Pb contaminated soil. Maximum removal efficiencies of 17.81% and 62.41% were achieved for both Pb and Cu, respectively. Adsorption, as well as Precipitation, were found to contribute to the lower removal efficiencies due to high soil pH, soil properties amongst others. RSM Models with good predictability of behavior of the studied parameters were generated. The p-values for the individual models were found to be less than 0.05, implying the statistical significance of the models. An increase in the pulse duty cycle was found to increase the removal efficiencies of both Cu and Pb. An increase in voltage gradient increased the Pb removal efficiency but conversely decreased Cu removal efficiency. Also, bentonite ratio was found to decrease the Cu removal efficiency but had insignificant effect on Pb removal efficiency. The total energy consumption over the 3 weeks treatment time for maximum Cu and Pb removal was found to be 146.65 kwh/m³ and 1151.58 kwh/m³, which are both lower than 2068 kwh/m³ obtainable in the traditional EKR. This study shows that more reduction in energy consumption is feasible through careful selection of experimental conditions and factors (pulse duty cycle and voltage gradient).

高能耗是被污染土壤的电动修复（EKR）的主要障碍之一。这项研究调查了膨润土/粘土比率，脉冲占空比和电压梯度对Cu和Pb污染土壤的脉冲电动修复（PEKR）的影响。Pb和Cu的最大去除效率分别达到17.81％和62.41％。由于高土壤pH值，土壤特性等因素，吸附和沉淀作用都导致较低的去除效率。生成了具有良好可预测性的研究参数行为的RSM模型。该p发现各个模型的-值小于0.05，这暗示了模型的统计显着性。发现脉冲占空比的增加会增加Cu和Pb的去除效率。电压梯度的增加增加了Pb的去除效率，但相反地降低了Cu的去除效率。另外，发现膨润土比率降低了Cu去除效率，但是对Pb去除效率的影响不显着。在三周的处理时间内，最大程度地去除Cu和Pb的总能耗为146.65 kwh / m ³和1151.58 kwh / m ³，均低于2068 kwh / m ³可通过传统EKR获得。这项研究表明，通过仔细选择实验条件和因素（脉冲占空比和电压梯度），进一步降低能耗是可行的。