This study comprehensively investigates the inhibition characteristics of the electrokinetic removal (EKR) of inorganic pollutants from soil due to evolution of the acidic and alkaline fronts (EAAF). The effects of EAAF on the ion strength of the soil pore fluid, potential distribution, soil colloids, clay minerals, and soil microstructure are systematically examined, in addition to the control effects of non-target charged species on the removal of target pollutants. The results show that the transport of target species near the anode region is mainly inhibited by potential flattening, soil colloid aggregation, and the closure of soil pores. Migration near the cathode region is mainly inhibited by the immobile chemical states of metals, potential flattening, soil dehydration, and a high soil adsorption ability owing to the relatively developed pores. This results also show that H⁺, OH^-, and soluble Al have a significantly control effect on the macroscopic dynamics of EKR of the target contaminants. The injection of acidic solution near the cathode alleviates the potential jump and prevents the formation of metal hydroxides to some extent. The average removal rates of nitrate, Pb, and Cd after EKR improved from 85.5%, 11.1%, and 21.8–98.5%, 35.8% and 47.7%, respectively.

本研究综合研究了酸性和碱性前沿（EAAF）演化对土壤中无机污染物的电动去除（EKR）抑制特性。EAAF 对土壤​​孔隙流体的离子强度、电位分布、土壤胶体、粘土矿物和土壤微结构的影响，以及非目标带电物质对目标污染物去除的控制作用，被系统地研究。结果表明，阳极区附近目标物种的输运主要受到电位平坦化、土壤胶体聚集和土壤孔隙闭合的抑制。阴极区附近的迁移主要受金属的固定化学状态、电位平坦化、土壤脱水、由于相对发达的孔隙，土壤吸附能力强。这一结果还表明，H⁺、OH ^-和可溶性铝对目标污染物的 EKR 宏观动力学具有显着的控制作用。在阴极附近注入酸性溶液减轻了电位跳跃，并在一定程度上防止了金属氢氧化物的形成。EKR 后硝酸盐、Pb 和 Cd 的平均去除率分别从 85.5%、11.1% 和 21.8-98.5%、35.8% 和 47.7% 提高。