节点文献
羟基脲与HNO2的反应动力学及对Pu(Ⅲ)的稳定性研究
Hydroxyurea Reaction With HNO2 and Pu(Ⅲ) Stabilization
【摘要】 在HNO3溶液中,研究了羟基脲(HU)与HNO2反应的动力学。研究结果表明,反应对HU呈零级,速率方程可表示为:-dc(HNO2)/dt=k0c(HNO2)c1 1(HNO3)c0(HU),在t=10℃,c(HNO2)=5mmol/L时,k0=(0 18±0 01)L1 1·mol-1 1·s-1,反应活化能Ea≈63kJ/mol。在不同离子强度的NaNO3溶液中的研究表明,离子强度变化对反应速率影响不大。分光光度法和萃取法研究表明,过量的HU在HNO3溶液中可以很好地稳定Pu(Ⅲ)。
【Abstract】 Reaction kinetics of hydroxyurea(HU) with HNO2 in nitric acid solution is studied.The results show that the reaction rate follows the equation as:-d c (HNO2)/d t = k0c (HNO2) c 1.1(HNO3)( c 0(HU)),where k0 =(0.18±0.01) L1.1·mol-1.1·s-1 at 10 ℃ and c (HNO2)=5 mmol/L;the activation (energy) is deduced to be about 63 kJ/mol.The reaction appears zero order relative to HU.Kinetic study performed at various NaNO3 solutions shows that salt ions have little effect on the reaction rate.Excess HU can stabilize Pu(Ⅲ) well in nitric solutions.
- 【文献出处】 核化学与放射化学 ,Journal of Nuclear and Radiochemistry , 编辑部邮箱 ,2004年01期
- 【分类号】O643.1
- 【被引频次】2
- 【下载频次】99