摘要
研究了ＨＮＯ＿３和ＴＢＰ－煤油介质中Ｕ（Ⅳ）的稳定性。测定了两种介质中Ｕ（Ⅳ）、ＨＮＯ＿３、ＴＢＰ浓度和气相中氧浓度对Ｕ（Ⅳ）氧化速率的影响。Ｕ（Ⅳ）的氧化速率都随温度提高而明显增加．其表观活化能分别为９１ｋＪ／ｍｏｌ（ＨＮＯ＿３介质）和４２ｋＪ／ｍｏｌ（ＴＢＰ－煤油介质）。对两种介质中Ｕ（Ⅳ）的氧化速率规律进行了比较。
The stability of uranium(Ⅳ)in nitric acid and tributyl Phospate(TBP)-kerosene media is investigated. The effects of concentrations of uranium(Ⅳ),nitric acid,TBP in the aqueous or or-ganic solution and the oxygen in gas phase on the oxidation rate of uranium(Ⅳ)are examined.The oxidation rates of uranium(Ⅳ)in both media increase obvisoly with increasing temperatureand the apparent activation eneries are 91kJ/mol for nitric acid medium and 42kJ/mol for TBP-kerosene medium. The regularities of oxidation rate of uranium(Ⅳ)in nitric acid and TBP.kerosene media are compared.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
1995年第3期218-222,共5页
Atomic Energy Science and Technology
基金
核科学基金
