Abstract The alternative desalination technique of membrane capacitive deionization (MCDI) has emerged in the last 15 years and received a lot of research attention since then. By using a voltage applied between two electrodes covered with ion-exchange membranes, MCDI has attempted to challenge established methods such as reverse osmosis or electrodialysis. In this study, through the crosslinking of sulfosuccinic acid (SSA) and glutaric acid (GA) with polyvinyl alcohol (PVA), cation exchange membrane preparation and characterization were introduced. For the CDI system, membranes were chosen based on their water absorption and ion exchange properties. The PVA/SSA/GA composite (mass ratio of 100:5:5) had the best water adsorption and charge efficiencies that could be utilized for CDI application. The membrane’s ability to desalinate water was assessed using electrical properties such as total resistance, specific capacitance, and electro adsorption coated with the best ratio composite CEM. The salt absorption capacity of 19.06 mg·g−1 with stable performance was found to be encouraging.

中文翻译：

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利用 MCDI 的 PVA/SSA/GA 阳离子交换膜的低成本和环保制造

摘要 膜电容去离子（MCDI）替代海水淡化技术是近 15 年来出现的，此后受到了广泛的研究关注。通过在覆盖有离子交换膜的两个电极之间施加电压，MCDI 试图挑战已建立的方法，例如反渗透或电渗析。本研究通过磺基琥珀酸（SSA）和戊二酸（GA）与聚乙烯醇（PVA）的交联，介绍了阳离子交换膜的制备和表征。对于 CDI 系统，根据其吸水性和离子交换特性选择膜。PVA/SSA/GA 复合材料（质量比为 100:5:5）具有最佳的吸水率和充电效率，可用于 CDI 应用。使用涂有最佳比例复合 CEM 的总电阻、比电容和电吸附等电性能评估膜的脱盐能力。吸盐量为 19.06 mg·g-1，性能稳定，令人鼓舞。