双极膜电渗析技术的研究进展

双极膜电渗析技术(BMED)是利用直流电场作用下双极膜界面层内发生水解离生成H+和OH-这一电化学特性,通过将双极膜与阴、阳离子交换膜适当组合,可实现不同的特种分离功能。与传统工艺相比,BMED具有高效节能、环境友好、操作便捷等突出技术优势。本文介绍了3种不同的BMED工作模型以及BMED在有机酸生产、水除盐、蛋白分离、超纯水制备等领域的最新研究进展,对BMED技术的进一步研究与发展进行了展望。

Recent progress in bipolar membrane electrodialysis

Bipolar membrane electrodialysis (BMED) is a novel membrane technology, with which H~+ and OH~- could be continuously produced under the effect of applied direct current via water decomposition occurred at the cation-anion interface of the bipolar membrane. Therefore, a variety of specific separation processes could be achieved by different combinations of bipolar membranes and ion-exchange membranes. Compared with conventional technologies, BMED has significant advantages such as high efficiency, environmental friendliness and convenient operation. In this paper, three different working models of BMED are introduced, and the recent progress of BMED in the fields of organic acid production, water desalination, albumen separation and ultrapure water production are discussed together with the prospects for further investigation and development.