阳离子交换膜对氯离子透过率的研究

Study on Chloride Ion Permeability of Cation Exchange Membrane

在电渗析过程中,离子交换膜隔绝反离子并使同离子通过,但实际使用过程中并非完全隔离,在电渗析过程中仍有部分反离子透过膜,限制了离子交换膜的应用效果,尤其是在氯离子环境中阳离子交换膜在实际使用过程中会有氯离子透过阳膜到达产物与阳极,产生的氯气污染环境、加剧膜的氧化,降低了膜的透过性,形成了恶性循环,为探究电渗析过程中离子交换膜对氯离子的截留效果,本文开展了阳离子交换膜对氯离子透过率的相关研究,研究表明,阳离子交换膜的种类对阳离子交换膜对氯离子的透过率有重要影响;电流密度和原料初始浓度的增加会导致阳离子交换膜对氯离子的透过率增加,实际生产中为减少产物中氯离子的含量,同时保证较高的生产效率,需要综合考量各方面的影响因素以确定最佳的工艺条件。

In the electrodialysis process,the ion exchange membrane isolates the opposite ions and allows the same ions to pass through,but the actual is not completely isolated,in the electrodialysis process there are still some counter ions through the membrane,limiting the application effect of ion exchange membrane,especially in the chloride ion environment cation exchange membrane in the actual use of the process will have chloride ions through the cation membrane to reach the product and anode,the resulting chlorine gas pollution of the environment,intensify the membrane oxidation,and in order to investigate the process of chloride ion permeation through the membrane into the product in electrodialysis,this paper conducted a study on the permeation rate of chloride ions through cation exchange membranes.In order to reduce the content of chloride ions in the product and ensure high production efficiency,the best process conditions need to be selected by considering all the influencing factors.