| 摘要: |
| [目的]探求支撑液膜法迁移W(Ⅵ)的最佳条件.[方法]采用多孔聚偏氟乙烯膜-N,N-二(1-甲基庚基)乙酰胺(N503)-煤油支撑液膜体系,研究了W(Ⅵ)的传输行为,考察了膜浸湿时间、搅拌速度、料液相pH、载体体积分数、W(Ⅵ)起始浓度、反应体系温度、离子强度和迁移时间等因素对W(Ⅵ)传输的影响,确定了最佳传输条件,并在此条件下对W(Ⅵ)、Mo(Ⅵ)进行了分离.[结果]多孔聚偏氟乙烯膜-N,N-二(1-甲基庚基)乙酰胺(N503)-煤油支撑液膜体系传输W(Ⅵ)的最佳条件为:膜浸湿时间70 min,搅拌速度为350～400 r/min,料液相pH为4.0～4.5,载体体积分数为25%～30%,水相离子强度为0.3～0.6,反应体系温度为288～308 K,W(Ⅵ)的最佳起始浓度为1.0×10-4～8.0×10-4 mol/L,迁移时间为90 min,在此条件下W(Ⅵ)的迁移率可达95%以上.[结论]利用以N503为载体的支撑液膜体系和研究建立的W(Ⅵ)传输条件,可以实现W(Ⅵ)与Mo(Ⅵ)的分离. |
| 关键词: 支撑液膜 N503 W(Ⅵ) 迁移率 分离条件 |
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| 基金项目:西安市科技攻关项目（GG06082）；西安理工大学创新基金项目（108210708） |
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| Transport of W(Ⅵ) ion through N503-kerosene supported liquid membrane |
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| Abstract: |
| 【Objective】 The study explord the optimum condition of W(Ⅵ). 【Method】 The transfer behavior of W(Ⅵ) through the supported liquid membrane system of porous polyvinylidene fluoride membrane-N503-kerosene was studied.The study analyzed the effect of the pH values in feed phase,soaking time of porous polyvinylidene fluoride membrane,stirring velocity,carrier concentration,W(Ⅵ) initial concentration in the feed,experimental temperature etc on W(Ⅵ) transport rate.In the case of the optimal technological conditions,W(Ⅵ) and Mo(Ⅵ) in the solution was separated.【Result】 The experiment results showed that the optimal conditions of transport and separation W(Ⅵ) were soaking time 70 min,stirring velocity 350-400 r/min,pH values 4.0-4.5 in feed phase,carrier volume fraction 25%-30%,ionic strength 0.3-0.6,temperature 288-308 K,transfer time 90 min.Under this condition,transport rate of W(Ⅵ) could reach over 95%.【Conclusion】 W(Ⅵ) and Mo(Ⅵ) can be separated using N503-kerosene supported liquid membrane system and transport conditions of this research was established. |
| Key words: supported liquid membrane N503 W(Ⅵ) transport rate separation condition |
