A green rust-coated expanded perlite (GR-coated Exp-p) microelectrode was synthesized and incorporated into a column-mode three-dimensional electrokinetic (3D-EK) platform to effectively pursue a continuous Cr(VI) removal from the aqueous solution. Brucite-like layers of GR were decorated onto the Exp-p material. The molar ratio of Fe(II) to Fe(III) played a most vital role among the three synthesis factors in influencing the performance of the particle electrode. For the equilibrium adsorption experiments, the target maximum adsorption capacity of 122 mg/g was predicted by a target optimizer and desirability function at the conditions following the pH of 4.7, the initial concentration of 172.4 mg/L, the dosage of 0.28 g/L, and the temperature of 28.96 °C, respectively. ${\mathit{SO}}_4^{2-}$, Cl⁻, and ${\mathit{NO}}_3^{-}$ fiercely competed with Cr(VI) anions in the acidic conditions for the locally positive sites. A low concentration and a slow flow were favored in the column-mode 3D-EK platform. The pseudo-first-order and Langmuir models were suitable for describing the kinetics and isotherms of the adsorption process, respectively. Cr(VI) anions were electrostatically attracted to the silanol groups and GR surface of the adsorbent, subsequently reduced in both heterogeneity and homogeneity, and finally immobilized by coordinating with silanediol groups and silanetriol groups.

合成了绿色生锈涂层膨胀珍珠岩（GR涂层Exp-p）微电极，并将其结合到柱模三维电动（3D-EK）平台中，以有效地从水溶液中连续去除Cr（VI）。GR的水镁石状层装饰在Exp-p材料上。Fe（II）与Fe（III）的摩尔比在影响颗粒电极性能的三个合成因子中起着至关重要的作用。对于平衡吸附实验，目标​​优化器预测了目标最大吸附容量为122 mg / g，在pH值为4.7，初始浓度为172.4 mg / L，剂量为0.28 g / L的条件下，具有期望的功能，温度分别为28.96°C。${\mathit{所以}}_4^{2-}$，氯^-和${\mathit{不}}_3^{-}$在酸性条件下与Cr（VI）阴离子激烈竞争局部阳性位点。色谱柱模式的3D-EK平台优选低浓度和缓慢流动。拟一阶模型和Langmuir模型分别适用于描述吸附过程的动力学和等温线。Cr（VI）阴离子被静电吸附到吸附剂的硅烷醇基团和GR表面，随后均一性和均一性降低，最后通过与硅烷二醇基团和硅烷三醇基团配位而被固定。