铅离子的液膜分离法研究  

A study on the separation of lead ions with liquid membrane

作　　者：余晓皎[1] 姚秉华[1] 周孝德[1] 

机构地区：[1]西安理工大学化学系,陕西西安710048

出　　处：《西北大学学报（自然科学版）》2002年第5期511-514,共4页Journal of Northwest University（Natural Science Edition）

基　　金：国家人事部留学回国人员基金资助项目(1999-015);陕西省教委专项基金项目(00JK208)

摘　　要：采用内耦合大块液膜分离技术,通过考察料液相pH值、温度、载体浓度对Pb2+迁移率的影响,研究了在以烷基膦酸为载体的液膜中Pb2+的液膜迁移行为,测定了不同载体浓度下的半迁移pH1/2值。结果表明:Pb2+的迁移率随温度和载体浓度的升高而逐渐增大;当外水相pH值及温度分别控制在2.75～3.75和278～298K范围内,载体浓度为5.00%时,Pb2+的迁移率可达99%以上。The effect of pH values in feed solution,concentrations of carrier and temperature on the transport rate of Pb2+ through a bulk liquid membrane consisting alkylphosphonic acid as membrane carrier were studied.The halftransfer pH1/2 values were determined under different concentrations of the carrier.The results showed that the transfer rate of lead markedly raised with the carrier concentration and temperation.The transfer rate can reach over 99% under the 2.75~3.75 of pH values,5.00% of carrier conc...

关 键 词：铅 液膜分离 烷基膦酸 

分 类 号：TQ028[化学工程]