The electro-adsorption characteristics and mechanism of Sr²⁺ ions by capacitive deionization (CDI) with activated carbon cloth/graphene oxide (ACC/GO) composite electrode were studied. The influence of initial concentration, applied voltage, and co-existing ion on Sr²⁺ removal was examined. The kinetic, isotherms, and mass transfer models as well as various surface characterization methods were employed to study the adsorption mechanism, and the computational fluid dynamics (CFD) was used to analyze the hydrodynamic performance of CDI process. The results showed that the removal efficiency of Sr²⁺ significantly increased from 11.38 to 41.45% when applied voltage increased from 0 to 1.2 V. The co-existing ions (Co²⁺ and Cs⁺) and increasing initial concentration of Sr²⁺ solution obviously reduced the removal efficiency. The PFO model could fit the experimental value better. The Freundlich model could better describe the adsorption isotherm with the highest R² values (0.9589). The transfer of Sr²⁺ to active sites was the rate-limiting step based on mass transfer models. CFD analysis of circular CDI channel indicated that increasing flow rate could effectively decrease the stagnant zone, and suitable flow rate was 10 mL min⁻¹ in this study. The adsorption mechanism of Sr²⁺ by CDI process included not only electro-adsorption but also non-electrostatic interaction adsorption, such as surface complexation and ion exchange.

研究了活性炭布/氧化石墨烯（ACC / GO）复合电极通过电容去离子（CDI）对Sr ²⁺离子的电吸附特性和机理。研究了初始浓度，施加电压和共存离子对Sr ²⁺去除的影响。采用动力学，等温线和传质模型以及各种表面表征方法研究吸附机理，并使用计算流体动力学（CFD）分析CDI过程的水动力性能。结果表明，当施加电压从0 V增加到1.2 V时，Sr ²⁺的去除效率从11.38显着提高到41.45％。共存离子（Co ²⁺和Cs⁺）和增加Sr ²⁺溶液的初始浓度会明显降低去除效率。PFO模型可以更好地拟合实验值。Freundlich模型可以更好地描述具有最高R ²值（0.9589）的吸附等温线。Sr ²⁺向活性位点的转移是基于传质模型的限速步骤。圆形CDI通道的CFD分析表明，增加流速可以有效地减少停滞区，本研究中的适宜流速为10 mL min ^-1。Sr ²⁺的吸附机理 通过CDI工艺进行的处理不仅包括电吸附，而且还包括非静电相互作用吸附，例如表面络合和离子交换。