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›› 2009, Vol. 9 ›› Issue (4): 647-651.

• 流动与传递 • 上一篇    下一篇

PC-88A为载体的大块液膜体系Cu(II)传输动力学

余晓皎 范薇 姚秉华 周孝德 张建丰   

  1. 西安理工大学应用化学系 开封大学化学工程学院 西安理工大学理学院应用化学系 西安理工大学水利水电学院 西安理工大学水利水电学院
  • 收稿日期:2009-02-25 修回日期:2009-05-20 出版日期:2009-08-20 发布日期:2009-08-20
  • 通讯作者: 余晓皎

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

YU Xiao-jiao, FAN Wei, YAO Bing-hua, ZHOU Xiao-de, ZHANG Jian-feng,   

  1. Department of Applied Chemistry, Xi'an University of Technology College of Chemical Engineering, Kaifeng University Institute of Water Resources and Hydro-electric Engineering，Xian University of Technology College of Water Resources and Hydraulic Power, Xi'an University of Technology College of Water Resources and Hydraulic Power, Xi'an University of Technology
  • Received:2009-02-25 Revised:2009-05-20 Online:2009-08-20 Published:2009-08-20
  • Contact: YU Xiao-jiao,

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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8.59 kJ/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.

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

Abstract: 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.

Key words: 2-ethylhexyl phosphonic acid-mono-2-ethylhexylester, copper ion, bulk liquid membrane, transport kinetics

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