| Pu催化HNO_2氧化U(Ⅳ)的研究 |
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| 引用本文： | 王浩文,周贤明,李高亮,兰天,刘金平,常尚文,何辉,段红卫.Pu催化HNO_2氧化U(Ⅳ)的研究[J].核化学与放射化学,2014,36(5):295-299. |
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| 作者姓名： | 王浩文 周贤明 李高亮 兰天 刘金平 常尚文 何辉 段红卫 |
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| 作者单位： | 1.中国原子能科学研究院 放射化学研究所，北京102413；2.环境保护部 核与辐射安全中心，北京100082 |
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| 摘 要： | 研究了Pu存在条件下HNO2氧化U(Ⅳ)的反应,并考察了HNO2浓度、反应温度、HNO3浓度、Pu浓度对U(Ⅳ)氧化速率的影响。结果表明:Pu对HNO2氧化U(Ⅳ)的反应具有显著催化作用;获得了Pu催化条件下HNO2氧化U(Ⅳ)的动力学方程:-dc(U(Ⅳ))/dt=kc(U(Ⅳ))c1.3(HNO3)c1.3(NO-2),得到了29℃时的反应速率常数k=(0.69±0.04)L2.6/(mol 2.6·min)。并对反应历程进行了探讨。
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| 关 键 词： | HNO2 U(Ⅳ)氧化 Pu催化 机理 |
Reaction Between U(Ⅳ)and Nitrous Acid Catalyzed by Plutonium |
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| WANG Hao-wen,ZHOU Xian-ming,LI Gao-liang,LAN Tian,LIU Jin-ping,CHANG Shang-wen,HE Hui,DUAN Hong-wei.Reaction Between U(Ⅳ)and Nitrous Acid Catalyzed by Plutonium[J].Journal of Nuclear and Radiochemistry,2014,36(5):295-299. |
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| Authors: | WANG Hao-wen ZHOU Xian-ming LI Gao-liang LAN Tian LIU Jin-ping CHANG Shang-wen HE Hui DUAN Hong-wei |
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| Affiliation: | 1.China Institute of Atomic Energy, P. O. Box 275(26), Beijing 102413, China;2.Nuclear and Radiation Safety Center of Ministry Environmental Protection, Beijing 100082, China |
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| Abstract: | The oxidation of U(Ⅳ) by nitrous acid in the present of plutonium was studied. The influence of the concentration of nitrous acid, nitric acid, plutonium on the oxidation of U(Ⅳ) was investigated. The results show that plutonium can catalyze the reaction between U(Ⅳ) and nitrous acid. And the rate equation of the reaction between U(Ⅳ) and nitrous acid catalyzed by plutonium was obtained: -dc(U(Ⅳ))/dt=kc(U(Ⅳ))c1.3 (HNO3)c1.3(NO-2), k=(0.69±0.04) L2.6/(mol2.6?min) when the temperature was 29 ℃. The mechanism of the oxidation of U(Ⅳ) was discussed. |
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| Keywords: | HNO2 oxidation of U(Ⅳ) catalytic effect of plutonium mechanism |
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