连续电提取浓缩技术

电去离子技术结合了电渗析和离子交换使离子在树脂中瞬时积累、降低体系电阻、电极上水解产生氢离子与氢氧根离子使树脂在线再生，以去除离子为目的制备纯水和高纯水. 这些被去除的离子在浓室中富集，可发展一种新型浓缩分离提取技术，现已逐渐应用于微量重金属、稀有金属、营养盐、有机酸碱，甚至气体的回收. 本文论述了这一连续电提取浓缩技术的原理及应用并探讨发展趋势，以期引起电化学研究工作者的关注.

Continuous Electroextraction and Concentration Technology

Electrodeionization process combined electrodialysis with ion exchange provides a method to produce pure water and ultrapure water due to the ions accumulated in the resin instantaneously to reduce the system resistance. Meanwhile, large numbers of hydrogen ions and hydroxyl ions are dissociated by water hydrolysis, thus, the ion exchange resins are in-situ regenerated electrochemically. This technology has been utilized to retrieve useful ions which are enriched in the concentrated compartment from a dilute solution. This hybrid process is consequently developed as a new type of extraction and concentration technology and has been gradually employed in the recoveries of heavy metals, rare metals, nutritive salts, organic acids and alkalis, and even gases. This review describes the principle and future trend of this kind of continuous electroextraction and concentration technology, addressing the applications for attracting attention of scientists in the electrochemistry field.