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化学学报
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化学学报 ›› 1991, Vol. 49 ›› Issue (5): 468-472. 上一篇    下一篇

研究论文

萃取体系二相界面荷电物质传输的电化学研究 I: 邻菲咯啉体系中Ni(II)、Co(II)相转移的电化学性质

王舫;林心如   

  1. 中国科学院上海冶金研究所
  • 发布日期:1991-05-15

An electrochemical study on transfer of charged species across interface of two phases in extraction systems I: Electrochemical characteristics of phase-transfer of nickel(II) and cobalt(II) in 1,10-phenanthroline systems

WANG FANG;LIN XINRU   

  • Published:1991-05-15

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用线性电流扫描极谱、恒电流单阶跃计时电位法及等电流双阶跃计时电位法, 研究了Ni(II)、Co(II)-邻菲咯啉(phen)体系在1,2-二氯乙烷(DCE)/水界面相转移的电化学行为。同时, 研究了相转移过程的机理。结果表明, 电解前, Phen与Ni(II)或Co(II)同时在水相时, Ni(II)、Co(II)行为类同; 若电解前Phen在有机相时, Ni(II)、Co(II)的行为截然不同, 原因在于两者与Phen配位反应的动力学的差异。

关键词: 水, 镍离子, 钴离子, 二氯乙烷, 电化学分析, 萃取体系, 二氮杂菲, 电化学过程, 相移, 液体-液体界面

The electrochem. behavior of nickel(II) and cobalt(II)-1,10-phenanthroline (phen) in the 1,2-dichloroethane (DCE)/aq. systems has been studied at the ascending water electrode and the stationary water electrode by current scan polarog. and chronopotentiometry. Similar electrochem. behavior was observed when nickel(II) and phen or cobalt(II) and phen existed in the aqueous phase before electrolysis. There are obvious differences between nickel(II) and cobalt(II) when phen was in the DCE phase. The differences can be explained by the kinetic-effect between nickel(II) and cobalt(II) in complexing with phen (from the DCE phase). The mechanism of the phase-transfer processes has also been elucidated.

Key words: WATER, NICKEL ION, COBALT ION, DICHLOROETHANE, ELECTROCHEMICAL ANALYSIS, EXTRACTION SYSTEM, PHENANTHROLINE, ELECTROCHEMICAL PROCESS, PHASE SHIFTS, LIQUID-LIQUID INTERFACES

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