纳滤膜的电解质溶液透过特性研究  

Experimental Investigation on Separation of Inorganic Electrolyte Solutions by Nanofiltration Membranes

作　　者：营爱玲[1] 王建[1] 王晓琳[2] 

机构地区：[1]江苏连云港淮海工学院化工系,222005 [2]北京清华大学化工系,100084

出　　处：《中国科技信息》2004年第22期8-9,共2页China Science and Technology Information

基　　金：国家自然科学基金资助项目(29876018)

摘　　要：选择ESNA2纳滤膜对1-1型(KCl、NaCl、NH_4Cl、KBr、Kl)、2-1型(MgCl_2、CaCl_2)、1-2型(K_2SO_4、Na_2SO_4)及2-2型(MgSO_4)等10种无机盐水溶液体系进行透过实验;考察了纳滤膜分离性能随操作压力、料液浓度及电解质种类等因素的变化所受到的影响。实验结果表明,纳滤膜对盐的截留率随操作压力的增加而增大,随盐浓度的增大而下降;纳滤膜对盐的截留率随电解质种类的不同而改变。Permeation experiments of aqueous solutions of ten inorganic electrolytes (KCl、 NaCl、、 NH4CI、 KBr、 Kl、 MgCI2、、 CaCI2、 K2SO4、 Na2SO4、MgSO4) were carried out by using ESNA2 nanofiltration membrane.The effects of the type and the concentration of electrolytes as well as the pressure on the separation performance of NT membranes (such as observed rejections) were investigated.The experimental results showed that the rejection of electrolytes was strongly dependent on both applied pressure difference and feed concentration;the charge effect was predominant in the rejection mechanism of the NF membrane.

关 键 词：纳滤膜 操作压力 截留率 NH4CL 膜分离 MGCL2 盐水溶液 KB 改变 电解质 

分 类 号：TQ028.8[化学工程]