pH对荷电有机超滤膜处理金属离子溶液的影响  

THE TREATMENT OF METAL ION SOLUTION BY USING CHARGED ORGANIC ULTRAFILTRATION MEMBRANE-THE EFFECT OF PH VALUE

作　　者：曾坚贤[1] 叶红齐[2] 

机构地区：[1]湖南科技大学化学化工学院,湖南湘潭411201 [2]中南大学化学化工学院,湖南长沙410083

出　　处：《水处理技术》2008年第3期50-53,共4页Technology of Water Treatment

基　　金：湖南省自然科学基金资助项目(05JJ40020);湖南省教育厅基金资助项目(05C170)

摘　　要：分别以NaCl、KCl、MgCl2、CaCl2和AlCl3溶液为背景电解质液,测定了聚砜中空纤维超率膜(截留分子量为6k)的流动电位、膜渗透性、离子截留率及pH值差(pH渗透液-pH截留液),并考察pH值对这些参数的影响;在此基础上,研究不同pH环境中离子混合溶液的超滤行为,并与单一溶液进行比较。结果表明,膜渗透性、离子截留率及pH差均与膜的流动电位有关,混合溶液较单一溶液的离子传递特性有一定程度的变化。NaCl, KCl, MgCl2, CaCl2 and AlCl3 solutions were employed respectively as background electrolytes, the streaming potential, membrane permeability, metal ion rejection ratio and ΔpH （pHpemeate- pHretentate） were measured by using polysulfone hollow fiber ultrafiltration membranes （molecular weight cut-off 6kDa）. Effect ofpH values on these parameters was investigated. Further, the ultrafiltration features in mixture solutions prepared with different valent salts were studied at various pH values, and then compared with those of single valent solution. Results showed that membrane permeability, metal ion rejection ratio and ApH were related with streaming potential. These parameters of mixture solutions changed at a certain degree with comparing to ion transmission features of single solutions.

关 键 词：超滤 流动电位 膜渗透性 离子传递 

分 类 号：TQ028.8[化学工程]