PC-88A为载体的大块液膜体系Cu(II)传输动力学  

Transfer Kinetics of Cu(II) through Bulk Liquid Membrane Using PC-88A as Carrier

作　　者：余晓皎[1] 范薇[2] 姚秉华[1] 周孝德[3] 张建丰[3] 

机构地区：[1]西安理工大学应用化学系,陕西西安710048 [2]开封大学化学工程学院,河南开封475004 [3]西安理工大学水利水电学院,陕西西安710048

出　　处：《过程工程学报》2009年第4期647-651,共5页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:50779055);陕西省科技计划基金资助项目(编号:2008K08-09)

摘　　要：采用以2-乙基己基膦酸-2-乙基己基单酯(PC-88A)为载体、CHCl3为膜溶剂的大块液膜分离体系,研究了搅拌速度、载体浓度、体系温度对铜离子迁移的影响.获得了不同反应温度下的表观反应速率常数,萃取与反萃取表观反应活化能分别为41.97和8.59kJ/mol.铜离子的迁移过程可用2个串联的准一级不可逆过程描述,萃取过程化学反应为控速步骤,反萃取过程扩散为控速步骤.The effects of stirring speed,carrier concentration and reaction temperature on transport of Cu（II） ion through bulk liquid membrane was studied with chloroform as membrane solvent and 2-ethylhexyl phosphonic acid-mono-2-ethylhexylester（PC-88A） as carrier.The pseudo-first order apparent rate constants of interfacial transport of Cu（II） ions were determined.The apparent activation energy values are 31.65 kJ/mol for extraction and 23.11 kJ/mol for stripping,respectively.The kinetics of Cu（II） transport could be evaluated by two consecutive irreversible pseudo-first order reactions.In this condition the chemical reaction is the controlled step for extraction,and diffusion for stripping.

关 键 词：2-乙基己基膦酸-2-乙基己基单酯 铜离子 大块液膜 传输动力学 

分 类 号：TQ028.8[化学工程]