电渗析过程中的浓差极化及水解离机理

Concentration polarization and water decomposition of electrodialysis

分析了电渗析在运行过程中浓差的形成以及与水解离之间的关系 ,在此基础上 ,分析了V -I曲线以及其拐点所代表的物理意义 .通过理论分析认为 :“浓差极化”的实质是“电势极化” .实际测得的V -I曲线验证了理论V -I曲线的正确性 .

Forming of concentration gradient and water decomposition during the process of electrodialysis were studied.On the basis of theoretical analyzing,the significance of the two turning points of the current-voltage characteristic curve was expounded.And the conception of electric potential polarization was put forward. The theoretical current-voltage characteristics was approved experimentally.