This study explored the applications of a vertical electrokinetic system (V-EK), which consists of multilayer electrodes positioned in shallow soil to form an ‘electric sieve’ to mitigate and prevent soil salinization caused by salts rising from saline groundwater in coastal areas. The experiments were conducted in column reactors in the laboratory. Compared to the control column, the level of ions in the surface soil was significantly reduced after the V-EK treatment, particularly for the column with voltages at 10 V and 20 V. At a voltage of 20 V, Na⁺ was detected at a range of 0.06–0.08 mg g⁻¹ in the surface soil; this is a >99% reduction compared to the controls. Similar efficacy was observed for Cl⁻ in the V-EK column. The concentrations of Cl⁻ were detected with a range of 0.01–0.02 mg g⁻¹ and 0.02–0.06 mg g⁻¹ at the surface soil with a voltage of 20 V and 10 V, respectively, compared to the Cl⁻ concentrations at 0.84–2.70 mg g⁻¹ in the control. After the application of the vertical ‘electric sieve’, the total salt content of surface soil could be controlled at a low value (<0.25‰) at voltages of 10 V and 20 V, compared to that in the control column (4.86‰). Finally, rising of salts from the artificial saline groundwater was effectively mitigated under voltages of 10 V and 20 V. Results from this work have demonstrated that the ‘electric sieve’ can effectively mitigate and prevent salts from rising in shallow groundwater to surface soil and reduce soil salinity.

中文翻译：

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应用垂直“电筛”减轻和防止沿海土壤盐渍化

本研究探讨了垂直电动系统 (V-EK) 的应用，该系统由位于浅层土壤中的多层电极组成，形成一个“电筛”，以减轻和防止沿海地区含盐地下水上升的盐分引起的土壤盐碱化。实验在实验室的柱反应器中进行。与对照柱相比，V-EK 处理后表层土壤中的离子水平显着降低，特别是对于电压为 10 V 和 20 V 的柱。在电压为 20 V 时，Na ⁺被检测到表层土壤中 0.06–0.08 mg g ^{-1的范围；}与对照组相比，这减少了 >99%。对于V-EK 柱中的Cl ^-观察到类似的功效。Cl的浓度^-在电压分别为 20 V 和 10 V 的表层土壤中检测到的范围为 0.01-0.02 mg g ^-1和 0.02-0.06 mg g ^{-1 ，而 Cl -}浓度为 0.84-2.70 mg g ^-1 在控制中。垂直“电筛”应用后，在10 V和20 V电压下，表层土壤总盐含量可控制在较低值（<0.25‰），与对照柱（4.86‰）相比. 最后，在 10 V 和 20 V 电压下，人工含盐地下水的盐分上升得到有效缓解。这项工作的结果表明，“电筛”可以有效缓解和防止盐分从浅层地下水上升到地表土壤，减少土壤盐分。