荷正电聚砜/Al_2O_3复合纳滤膜的制备及其分离Au(Ⅲ)  

Positively charged nanofiltration membrane of polysulfone/ Al_2O_3 composite for selective gold(Ⅲ) separation

作　　者：张新丽[1] 胡小玲[1] 管萍[1] 赵亚梅[1] 

机构地区：[1]西北工业大学理学院,陕西西安710072

出　　处：《化工进展》2010年第1期39-44,50,共7页Chemical Industry and Engineering Progress

摘　　要：采用含浸法制备聚砜/Al2O3复合荷正电纳滤膜。探讨各种主要工艺条件对膜分离性能的影响。通过测定膜流动电位及其对不同无机盐阳离子截留率,分析制膜条件对膜电性能的影响。利用扫描电镜(SEM)分析膜表面及截面形貌,利用傅里叶红外光谱仪(FTIR)分析表面活性层结构及成膜机理。对硫脲浸金液中Au(Ⅲ)进行富集分离研究,Au(Ⅲ)的截留率可达88%～95%,为膜法分离贵金属提供了新的思路。Positively charged nanofiltration membrane ofpolysulfone/Al2O3 composite was prepared by a immersion process. The influence of main technical conditions during membrane preparation on membrane transport parameters was studied including pure water flux, Na^＋ transport parameter and streaming potential. The morphologies of membrane surface and cross-section were observed by SEM. The structure of membrane surface active layer and and its formation mechanism were analysed by FTIR. In the enrichment of gold from thiourea leaching solution, the prepared membrane has a better rejection performance. At 0.65 MPa and 20℃, the rejection of gold（Ⅲ） could be reached to about 88%--95%.

关 键 词：复合 荷正电 Au(Ⅲ) 富集 

分 类 号：TQ316.63[化学工程—高聚物工业] TF803.23[冶金工程—有色金属冶金]