Groundwater is the most widely used water resource worldwide. In addition to natural underground pollutants, it is also affected by anthropogenic pollution sources. Highly soluble nitrate can easily leak into groundwater via precipitation. Nitrate has the potential to produce nitrosamines and thus can cause blue baby syndrome as well as several types of cancer, including that of the digestive system. Moreover, nitrates lead to eutrophication in bodies of water such as rivers and lakes. Therefore, organizations such as the World Health Organization (WHO) and the US Environmental Protection Agency (EPA) have limited the maximum acceptable nitrate concentration in drinking water to 10 mg/L. These adverse effects make it necessary to remove nitrates from water. The membrane capacitive deionization (MCDI) process can successfully remove nitrate. In this study, solutions with different concentrations of nitrate were treated via MCDI at different removal efficiencies, resulting in nitrate reductions below the limit values. Thus, the MCDI process proved to be an economical treatment approach, and during the treatment phase no significant effect of nitrate concentration levels was observed on the recovery efficiency. During the MCDI treatment, the electrodes accepted the SO₄²⁻ and NO₃⁻ ions approximately equally, while Cl⁻ removal rate was lower. Groundwater obtained from the Meric district of Edirne (Turkey) containing 233 mg/L nitrate was successfully purified via the MCDI process, with a nitrate removal efficiency of 98%. The energy expenditure calculated for the nitrate removal treatment of the groundwater was 0.4 kWh/m³.

地下水是全球使用最广泛的水资源。除了天然的地下污染物外，它还受到人为污染源的影响。高度溶解的硝酸盐很容易通过沉淀泄漏到地下水中。硝酸盐具有产生亚硝胺的潜能，因此可以引起蓝婴儿综合症以及几种类型的癌症，包括消化系统癌症。此外，硝酸盐导致河流和湖泊等水体富营养化。因此，诸如世界卫生组织（WHO）和美国环境保护署（EPA）之类的组织已将饮用水中的最高硝酸盐浓度限制为10 mg / L。这些不利影响使得有必要从水中去除硝酸盐。膜电容去离子（MCDI）工艺可以成功去除硝酸盐。在这项研究中，具有不同硝酸盐浓度的溶液通过MCDI以不同的去除效率进行处理，导致硝酸盐减少量低于极限值。因此，MCDI工艺被证明是一种经济的处理方法，在处理阶段，没有观察到硝酸盐浓度水平对回收效率的显着影响。在MCDI处理期间，电极接受了SO₄ ^2-和NO ₃ ^-离子的大致相等，而氯^-去除率较低。通过MCDI工艺成功地纯化了从爱迪尔尼（土耳其）Meric区获得的含有233 mg / L硝酸盐的地下水，硝酸盐去除率达到98％。计算用于地下水的硝酸盐去除处理的能量消耗为0.4 kWh / m ³。