This study was carried out to investigate the efficacy of electrokinetics to remediate two identical soft kaolinite clay slurries with a water content of 70%. The first slurry was contaminated with copper at a concentration of 150 mg/kg of dry soil and the second with cadmium at the same concentration. The tests were performed in four identical electrokinetic columns (two for the electrokinetics tests and two for control) with a volume capacity of 14 L. An electric field intensity of 140 V/m was applied during 118 h of remediation with the top electrode serving as the anode (+ ve) and the bottom electrode acting as the cathode (− ve). The results showed that electrokinetics removed 2070 mL of water from the soil with copper contamination (compared to only 693 mL in the control test) and 1828 mL of water from the soils with cadmium contamination (compared to 839 mL in the control test). Electrokinetics was successful in removing significant portion of the copper and cadmium from most of the contaminated soil with the highest removal in copper (67%) and in cadmium (89%) in the soil sections near the anode. Electrokinetics was more effective in mobilizing the cadmium in the clay soil as compared to copper. Energy consumption determination revealed that electrokinetic remediation was successful in the removal of copper and cadmium from the section near the anode at rates of 77 and 100 mg/kg per kWh, respectively.

进行这项研究是为了研究电动力学修复含水量为 70% 的两种相同的软高岭石粘土泥浆的功效。第一种浆液被浓度为 150 毫克/千克干土壤的铜污染，第二种浆液被相同浓度的镉污染。测试在四个相同的电动柱（两个用于电动测试，两个用于控制）中进行，体积容量为 14 L。在 118 小时的修复期间施加 140 V/m 的电场强度，顶部电极用作阳极 (+ ve) 和底部电极充当阴极 (- ve)。结果表明，电动力学从具有铜污染的土壤中去除了 2070 毫升的水（相比之下，在对照测试中仅为 693 毫升）和从具有镉污染的土壤中去除了 1828 毫升的水（相比之下，在对照测试中为 839 毫升）。电动力学成功地从大多数受污染的土壤中去除了大部分铜和镉，其中阳极附近土壤部分的铜 (67%) 和镉 (89%) 去除率最高。与铜相比，电动力学在移动粘土中的镉方面更有效。能耗测定表明，电动修复成功地以每千瓦时 77 和 100 毫克/千克的速率从靠近阳极的部分去除了铜和镉。电动力学成功地从大多数受污染的土壤中去除了大部分铜和镉，其中阳极附近土壤部分的铜 (67%) 和镉 (89%) 去除率最高。与铜相比，电动力学在移动粘土中的镉方面更有效。能耗测定表明，电动修复成功地以每千瓦时 77 和 100 毫克/千克的速率从靠近阳极的部分去除了铜和镉。电动力学成功地从大多数受污染的土壤中去除了大部分铜和镉，其中阳极附近土壤部分的铜 (67%) 和镉 (89%) 去除率最高。与铜相比，电动力学在移动粘土中的镉方面更有效。能耗测定表明，电动修复成功地以每千瓦时 77 和 100 毫克/千克的速率从靠近阳极的部分去除了铜和镉。