高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (2): 212.

• 研究简报 • 上一篇    下一篇

铁和铈对光还原分离铕的影响

李瑞祥1, 杨汝栋2   

  1. 1. 四川大学化学系;
    2. 兰州大学化学系
  • 收稿日期:1988-05-06 出版日期:1990-02-24 发布日期:1990-02-24
  • 通讯作者: 李瑞祥
  • 基金资助:

    国家自然科学基金

Influences of Iron and Cerium on Photoreduction Separation of Europium

Li Ruixiang1, Yang Rudong2   

  1. 1. Department of Chemistry, Sichun University, Chengdu;
    2. Department of Chemistry, Landau University, Lanzhou
  • Received:1988-05-06 Online:1990-02-24 Published:1990-02-24

摘要: 镧系元素的f→d跃迁和荷移跃迁带用相应波长的光激发会导致相应元素发生光氧化和光还原[1.2]。在能形成高价的元素中,Ce3+最易发生光氧化[13]

关键词: 光还原, 光氧化, 铁, 铈,

Abstract: In this paper, the influences of iron and cerium on the yield and induction time of photore-duction of europium are investigated with a low pressure mercury lamp(20 W) as the light source, the mixture of formic acid and sodium formate as the scavenger for OHradical and sodium sulfate as the precipitating agent for europium ( Ⅱ). The results show that the iron (Ⅱ) and cerium ( Ⅲ ) can be oxidized to iron (Ⅲ ) and cerium (Ⅳ ) in the photochemical process, and the europium ( Ⅱ ) is oxidized by iron ( Ⅲ ) and cerium (Ⅳ ) formed in this system, so that the yield of photoreduction of europium is decreased and the induction time of photochemical process is increased respectively with increasing of concentrations of iron and cerium in the solution to be photolyzed.

Key words: Photoreduction, Photooxidation, Iron, Cerium, Europium

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