Abstract

The valence behavior of neptunium in the reaction of Np(V) with U(IV) in HNO₃ solutions containing hydrazine and Tc(VII) ions has been studied. It was found that Np(V) is reduced to Np(IV) in two successive stages differing in the rates, after which the formed Np(IV) is oxidized to the pentavalent state. Simultaneously with the Np(V) reduction, complete oxidation of U(IV) occurs. Kinetic equations describing the rates of Np(V) reduction and U(IV) oxidation are established, and possible schemes of these reactions are studied.

中文翻译：

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在含有肼和锝离子的 HNO3 溶液中用四价铀还原 Np(V)

摘要

研究了在含有肼和 Tc(VII) 离子的HNO ₃溶液中Np(V) 与 U(IV) 反应中镎的价态行为。发现 Np(V) 在两个不同速率的连续阶段被还原为 Np(IV)，之后形成的 Np(IV) 被氧化为五价态。与 Np(V) 还原同时发生 U(IV) 的完全氧化。建立了描述 Np(V) 还原和 U(IV) 氧化速率的动力学方程，并研究了这些反应的可能方案。