Abstract Electrokinetic remediation, EKR, is technology that circumvents the traditional challenges faced by many existing remediation technologies in low permeability substrates. Cheap, non-toxic additives such as KClmay further help EKR remediation efficiency by increasing electrolyte strength; their use has been reported in concretes, but not soils. Here, we investigate the efficiency of low-energy EKR (with and without electrolyte additives) in the mobilization of radiostable Cs and Sr in a clayey, organic-rich soil. Soil maturation time and voltage are key factors in determining success of EKR. Although Cs and Sr are effectively mobilized (up to 317 and 330%, respectively) in the electric field in our soils (determined by XRF), maturation time (7, or 45 days) and voltage (15 or 20 V) are key to successful remediation using EKR. We more broadly show that understanding speciation and the local ionic environment of relevant radionuclides within entrained matrices is vital to effective application of this technology.

中文翻译：

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富含有机质土壤中核裂变产物的强化电动修复

摘要 电动修复 (EKR) 是一种技术，它规避了许多现有修复技术在低渗透性基质中面临的传统挑战。廉价、无​​毒的添加剂（如 KCl）可以通过增加电解质强度进一步提高 EKR 的修复效率；据报道，它们在混凝土中的应用，但在土壤中没有。在这里，我们研究了低能量 EKR（有和没有电解质添加剂）在富含有机质的粘土质土壤中对放射性稳定的 Cs 和 Sr 的动员的效率。土壤成熟时间和电压是决定 EKR 成功与否的关键因素。尽管 Cs 和 Sr 在我们土壤中的电场中被有效动员（分别高达 317% 和 330%）（由 XRF 确定），但成熟时间（7 或 45 天）和电压（15 或 20 V）是关键使用 EKR 成功修复。