高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (4): 498.

• 论文 • 上一篇    下一篇

三价铀在空气中的氧化动力学研究

周祖铭, 赵雷洪, 秦启宗   

  1. 复旦大学物理二系, 200433
  • 收稿日期:1989-07-26 出版日期:1991-04-24 发布日期:1991-04-24
  • 通讯作者: 周祖铭

A Study of Kinetics of Oxidation Reaction of Uranium (Ⅲ) with Oxygen in the Air

Zhou Zu-ming, Zhao Lei-hong, Qin Qi-zong   

  1. Department of Physics, Fudan University, Shanghai, 200433
  • Received:1989-07-26 Online:1991-04-24 Published:1991-04-24

摘要: 测定了盐酸介质中铀(Ⅲ)在空气中的氧化速率以及不同条件对氧化速率的影响,得出反应速率方程。反应速率随温度升高而增加,表观活化能为34.3kJ/mol。铀(Ⅲ)在空气中转化为铀(Ⅳ)的反应,可能是一个发生在气液相界面的催化氧化过程。

关键词: 三价铀, 氧化动力学, 活化能

Abstract: The oxidation reaction of uranium (Ⅲ) in the hydrochloric acid solution with oxygen in the air was investigated. It was found that the oxidation rate was proportional to [U(Ⅲ)] and [Cl-]-1/2in hydrochloric acid solution and [O2](6)1/4 in air. Moreover, the rates were nearly independent of [H+] in the range of 0. 2-2 mol/L. The oxidation rate increased with increasing temperature. The apparent activation energy was found to be 3-1. 3 kJ/mol in the temperatures of 10 to 40℃ region. It is suggested that the reaction may be a catalytic oxidation process.

Key words: Trivalent uranium, Oxidation kinetics, Activation energy

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