高等学校化学学报

高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (9): 1393.

• 研究简报 • 上一篇    下一篇

四价铀在硝酸介质中的氧化动力学研究

周祖铭, 章英杰, 杜慧芳   

  1. 复旦大学物理二系, 上海, 200433
  • 收稿日期:1993-10-05 修回日期:1994-01-05 出版日期:1994-09-24 发布日期:1994-09-24
  • 通讯作者: 周祖铭,男,55岁,副教授.
  • 作者简介:周祖铭,男,55岁,副教授.
  • 基金资助:

    核科学基金

Kinetic Studies on the Oxidation of Uranium(Ⅳ)in Nitric Acid Medium

AHOU Zu-Ming, ZHANG Ying-Jie, DU Hui-Fang   

  1. Department of Physics Ⅱ, Fudan University, Shanghai, 200433
  • Received:1993-10-05 Revised:1994-01-05 Online:1994-09-24 Published:1994-09-24

PDF (PC)

关键词: 四价铀, 硝酸介质, 氧化, 动力学

Abstract: The kinetics of oxidation of uranium(Ⅳ)in nitric acid medium by nitrite and air oxygen, respectively, has been investigated. The effects of concentration of uranium(Ⅳ), nitrate, hydrogen ion and nitrite in the aqueous solution or the oxygen in air on tl1e oxidation rate of uranium(Ⅳ)were examined.The oxidation rate of uranium(Ⅳ)increases obviously with increasing temperature and the apparent activation energies were 47 kJ/mol for nitrite and 91 kJ/mol for oxygen as the oxidant.The mechanisms of oxidation of uraniuni(Ⅳ)for both oxidation reaction were discussed.

Key words: Tetravalent uranium, Nitric acid medium, Oxidation, Kinetics

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