In this work, a novel composite electrodes D314/activated carbon (AC) were prepared by D314 ion-exchange resin and activated carbon (AC) for the preferential adsorption of vanadium ion in capacitive deionization (CDI) technique. The conditions for preparing D314/AC composite electrode had been optimized using Response surface methodology (RSM). The vanadium (V) preferential adsorption characteristics, as affected by the weight ratio of resin to AC, the content of binder and the particle size of resin, were acquired by the Box-Behnken experimental design. In the optimized conditions, the average values of the adsorption amount of V, separation efficiency of V to iron (Fe) and aluminium (Al) reach 106.89 ± 3.03 mg/g, 2.08 ± 0.08, 10.55 ± 0.45, which were among the 95% confidence intervals (92.86, 110.10), (1.79, 2.16), (7.91, 12.24) of the predicted optimal value. The particle size of resin has the largest impact on the three response values, which will affect the specific surface area and specific capacitance of the composite electrode.

在这项工作中，由D314离子交换树脂和活性炭（AC）制备了一种新型复合电极D314 /活性炭（AC），用于在电容去离子（CDI）技术中优先吸附钒离子。使用响应表面方法（RSM）优化了制备D314 / AC复合电极的条件。通过Box-Behnken实验设计获得了钒（V）的优先吸附特性，该特性受树脂与AC的重量比，粘合剂含量和树脂粒径的影响。在最佳条件下，钒的吸附量平均值，钒对铁（Fe）和铝（Al）的分离效率平均值分别为106.89  ±  3.03  mg / g，2.08  ±  0.08、10.55  ± 在预测最佳值的95％置信区间（92.86，110.10），（1.79，2.16），（7.91，12.24）中为0.45。树脂的粒径对三个响应值的影响最大，这将影响复合电极的比表面积和比电容。