N263和TBP为协同流动载体的液膜体系分离钐(Ⅲ)和钆(Ⅲ)的研究  

Studies of Separation of Sm^(3+) and Gd^(3+) by Liquid Membranes System Containing TBP and N263 Co-extraction Mobile Carrier

作　　者：李明玉[1] 王向德[1] 万印华[1] 张秀娟[1] 崔元臣[2] 唐启红[2] 张大丽[2] 

机构地区：[1]华南理工大学化工学院环境科学研究所,广州510641 [2]河南大学化学系,开封475001

出　　处：《高等学校化学学报》1998年第1期103-106,共4页Chemical Journal of Chinese Universities

基　　金：国家教育委员会博士学科点专项基金

摘　　要：研究了N263和TBP为协同载体的液膜体系分离钐和利的行为．考察了膜相添加剂、内水相反萃剂、外水相盐析剂和膜相中载体浓度对传质分离的影响．当用TBP作为膜相添加剂时，N263能很好地溶解在煤油中．N263-TBP-LMA-1-煤油和NH4NO3协同流动载体液膜体系在迁移稀土离子时表现出"倒序"特性，与单纯的N263体系相比，该体系对钐、钆具有较高的选择性．The separation of Sm3+ and Gd3+ by liquid membranes system containing TAP and N263 co-extraction mobile carrier was studied. The effect of several factors on transport of Sm3+ and Gd3+ was examined. N263 can be dissolved in kerosene when TBP was used as oil adjusting agents. So kerosene may take the place of some aromatic diluents. On the other hand, a co-extraction effect was found between N263 and TBP in membrane process. Instead of using dilute HNO3 as stripping agent, dilute NH4NO3 was used to be an internal aqueous phase in the experiment. The stripping result of dilute NH4NO3 for Sm3+ and Gd3+ was similar to that of dilute HNO3 as their concentrations were all in 0. 01～0.5 mol/L. When the membrane system of N263-TBP LMA-1 -kerosene (oil phase) and NH4NO3 (internal aqueous phase) was applied, the transport rate decreased with the increase of atomic number of rare earth, and the system selectivity for Sm3+ and Gd3+ is better than N263 system.

关 键 词：N263 TBP 钐 钆 液膜分离 

分 类 号：O614.337[理学—无机化学] O614.339[理学—化学]