电去离子(EDI)过程水解离机理的研究(Ⅰ)特征曲线  

Study on dissociation mechanism of water in electrodeionization process (Ⅰ) The charateristic curves

作　　者：王建友[1] 王世昌[1] 

机构地区：[1]天津大学化工学院化学工程研究所,天津300072

出　　处：《膜科学与技术》2005年第4期1-7,共7页Membrane Science and Technology

基　　金：国家自然科学基金重点项目资助(20236030)

摘　　要：系统研究了电去离子(EDI)过程非稳态开机阶段及稳定工况下的特征曲线,获得了若干区别于电渗析(ED)过程特征曲线的重要现象.研究表明,在开机阶段,淡水室中水的解离主要是在阳膜/阳树脂的表面发生;随着过程逐渐达到稳态,阴膜/阴树脂的表面也将发生程度不断加强的水的解离.浓差极化与水解离的可利用性是EDI与ED过程的最本质区别.The charateristic curves of EI）I process at the start - up, in the interim and steady stages were studied systematically. Differences between the charateristic curves of EDI and traditional ED process were observed. It is found that at the start - up stage, the dissociation of water occurs mostly on the surface of cation - exchange membrane and resin; As the process gradually reach the steady stage, the dissociation of water occurring on the surface of anion - exchange membrane and resin will also become more and more strong. The essential distinction of EDI process from ED process is the utilizable concentration polarization and dissociation of water.

关 键 词：电去离子 离子交换膜 超纯水 水解离 

分 类 号：TQ028[化学工程]