Kim Hyunjin, Kim Seonghwan, Lee Byeongho, Presser Volker, Kim Choonsoo
Department of Environmental Engineering with Institute of Energy/Environment Convergence Technologies and Department of Future Convergence Engineering, Kongju National University, 1223-24, Cheonan-daero, Cheonan-si 31080, Republic of Korea.
Samsung Research, Samsung Electronics Company, Limited, Seoul 06765, Republic of Korea.
Langmuir. 2024 Mar 5;40(9):4567-4578. doi: 10.1021/acs.langmuir.3c03648. Epub 2024 Feb 20.
Capacitive deionization (CDI) has emerged as a promising desalination technology and recently promoted the development of multichannel membrane capacitive deionization (MC-MCDI). In MC-MCDI, the independent control of multiflow channels, including the feed and electrolyte channels, enables the optimization of electrode operation in various modes, such as concentration gradients and reverse voltage discharge, facilitating semicontinuous operation. Moreover, the integration of redox couples into MC-MCDI has led to advancements in redox-mediated desalination. Specifically, the introduction of redox-active species helps enhance the ion removal efficiency and reduce energy consumption during desalination. This systematic approach, combining principles from CDI and electrodialysis, results in more sustainable and efficient desalination. These advancements have contributed to improved desalination performance and practical feasibility, rendering MC-MCDI an increasingly attractive option for addressing water scarcity challenges. Despite the considerable interest in and potential of this process, there is currently no comprehensive review available that covers the operational features and applications of MC-MCDI. Therefore, this Review provides an overview of recent research progress, focusing on the unique cell configuration, vital operation principles, and potential advantages over conventional CDI. Additionally, innovative applications of MC-MCDI are discussed. The Review concludes with insights into future research directions, potential opportunities in industrial desalination technology, and the fundamental and practical challenges for successful implementation.
电容去离子化（CDI）已成为一种很有前景的脱盐技术，最近推动了多通道膜电容去离子化（MC-MCDI）的发展。在MC-MCDI中，对包括进料通道和电解质通道在内的多流道进行独立控制，能够在各种模式下优化电极操作，如浓度梯度和反向电压放电，有利于半连续运行。此外，将氧化还原对集成到MC-MCDI中推动了氧化还原介导脱盐技术的进步。具体而言，引入氧化还原活性物质有助于提高脱盐过程中的离子去除效率并降低能耗。这种将CDI和电渗析原理相结合的系统方法，实现了更可持续、更高效的脱盐。这些进展有助于提高脱盐性能和实际可行性，使MC-MCDI成为应对水资源短缺挑战的一个越来越有吸引力的选择。尽管人们对该过程有着浓厚的兴趣和潜力，但目前尚无全面涵盖MC-MCDI操作特点和应用的综述。因此，本综述概述了近期的研究进展，重点介绍了独特的电池配置、重要的操作原理以及相对于传统CDI的潜在优势。此外，还讨论了MC-MCDI的创新应用。综述最后对未来的研究方向、工业脱盐技术的潜在机遇以及成功实施所面临的基本和实际挑战进行了深入探讨。
