Abstract Dissolved organic matter and scaling are the main causes of electrode fouling, blocking activated carbon pores and reducing their performance. However, limited information exists on fouling by low molecular weight organic matter in the capacitive deionization (CDI) process. This study therefore systematically investigated for the first time a pretreatment process to prevent the accumulation of organic and inorganic matter as well as scaling in the CDI process. During various pretreatments, activated filter media and granule activated carbon were considered promising for drinking water treatment. The higher the turbidity and organic matter concentration in the CDI feed solution was, the greater the reduction of salt removal efficiency, production rate, and energy consumption became. Divalent ions, such as Ca2+, had no noticeable effect on CDI treatment performance because of the neutralization effect of the dispersant, whereas iron had a noticeable effect on CDI electrode fouling. The results of this study are foreseen to help minimize its negative impact by reducing organic matter fouling and enabling water reuse.

中文翻译：

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电容去离子预处理：使用活性过滤介质和颗粒活性炭过滤的可行性测试

摘要 溶解的有机物和结垢是电极结垢、堵塞活性炭孔隙并降低其性能的主要原因。然而，关于电容去离子 (CDI) 过程中低分子量有机物污染的信息有限。因此，这项研究首次系统地研究了预处理过程，以防止有机和无机物质的积累以及 CDI 过程中的结垢。在各种预处理过程中，活性过滤介质和颗粒活性炭被认为有希望用于饮用水处理。CDI进料液中的浊度和有机物浓度越高，脱盐效率、产率和能耗的降低幅度越大。二价离子，如 Ca2+，由于分散剂的中和作用，对 CDI 处理性能没有显着影响，而铁对 CDI 电极污垢有显着影响。预计这项研究的结果将通过减少有机物污染和实现水的再利用来帮助最大限度地减少其负面影响。