摘要
研究了反萃相H2 SO4浓度、料液H+浓度、温度对二 ( 2 乙基己基 )磷酸 煤油液膜体系迁移Zn2 +的影响 .当膜相载体浓度改变及添加不同量的表面活性剂Span 80时 ,用大块液膜测定了膜 料液界面的萃取反应表观速率常数k1和膜 反萃相界面的反萃取表观速率常数k2 ,并进行了相应的动力学分析 .实验证明 ,Zn2 +的迁移可用 2个连续单向不可逆的一级反应来描述 .
The effects of H 2SO 4 concentration in stripping phase, H + concentration in feed phase and temperature on the transport of zinc(Ⅱ) ions through a bulk liquid membrane containing di(2 ethylhexyl)phosphoric acid in kerosene have been studied. The pseudo first order apparent rate constants, k 1d and k 2a , of interfacial reactions in membrane feed solution interface or membrane stripping solution interface have been determined with bulk liquid membrane on various carrier concentration and Span 80 content. The zinc(Ⅱ) transport kinetics has been evaluated by two consecutive irreversible first order reactions.
出处
《应用化学》
CAS
CSCD
北大核心
2000年第1期47-50,共4页
Chinese Journal of Applied Chemistry
基金
国家教委留学归国人员启动经费资助
关键词
锌离子
液膜萃取
迁移动力学
废水处理
zinc ion,liquid membrane extraction,di(ethylhexyl)phosphoric acid,transport kinetics
