The reversible reaction kinetics of neptunium with nitrous and nitric acids

The reversible reaction kinetics of neptunium with nitrous and nitric acids
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镎与亚硝酸和硝酸的可逆反应动力学

DOI:
10.1007/s10967-015-4347-3
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发表时间:
2016-04
影响因子:
1.6
通讯作者:
Wang, Ri-teng
Wang, Ri-teng
中科院分区:
化学4区
文献类型:
--
作者:
Yang, He;Ye, Guo-An;Zhou, Xian-Ming;Wang, Ri-teng

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为了解硝酸溶液中Np(V)/Np(VI)的平衡状态、转化过程及机理,采用非线性拟合方法,对N2 O3和N2 O3在硝酸溶液中的氧化还原动力学进行了电化学研究.得到了氧化还原反应的速率方程。正、逆反应的表观活化能均为80 kJ/mol。改变硝酸和亚硝酸的浓度会不同程度地改变正、逆反应的速率。结果,Np(V)/Np(VI)的平衡状态改变,但它不受温度的影响。
In order to understand the equilibrium state, conversion process and mechanism of Np(V)/Np(VI) in nitric acid solution, the redox kinetics of neptunium with nitrous and nitric acids was studied spectrophotometrically by an nonlinear fitting method. The rate equation of the redox reaction was acquired. Apparent activation energy of forward reaction and reverse reaction are approximately the same of 80 kJ/mol. Varying the concentrations of nitric and nitrous acids will change the reaction rate of forward and reverse reaction in different degrees. As a result, the equilibrium state of Np(V)/Np(VI) is altered, but it is not influenced by temperature.
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