Kinetics of Tc(VII) Reduction with Diformylhydrazine in a Nitric Acid Solution in the Presence of U(VI) Ions

IF 0.9 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Radiochemistry Pub Date : 2025-04-05 DOI:10.1134/S1066362225010035

K. N. Dvoeglazov, E. D. Filimonova, L. N. Podrezova, E. Yu. Pavlyukevich

引用次数: 0

Abstract

The Тс(VII) reduction with 1,2-diformylhydrazine in nitric acid solutions in the presence of uranyl nitrate was studied by spectrophotometry. Tc(VII) is reduced to Тс(IV) via intermediate Tc(V) species. The optical spectra were resolved into two components by mathematical deconvolution. The kinetic curves are S-shaped. Presumably, the induction period is associated with the formation of Тс(V). The rate equation of the Тс(IV) formation under these conditions was obtained. The Tc(V) formation rate increases with an increase in the diformylhydrazine and U(VI) concentrations, initial Тс(VII) concentration, and temperature but decreases with an increase in the nitric acid concentration. From the data obtained, the reaction constants were calculated and the partial reaction orders with respect to components were found.

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U（VI）离子存在下硝酸溶液中二甲酰肼还原Tc（VII）的动力学

用分光光度法研究了1,2-二甲酰肼在硝酸铀酰存在下对Тс（VII）的还原反应。Tc（VII）通过中间Tc(V)种还原为Тс（IV）。通过数学反褶积将光谱分解为两个分量。动力学曲线呈s形。可以推测，诱导期与Тс(V)的形成有关。得到了在这些条件下Тс（IV）的生成速率方程。Tc(V)的生成速率随二甲酰肼和U（VI）浓度、初始Тс（VII）浓度和温度的升高而升高，随硝酸浓度的升高而降低。根据得到的数据，计算了反应常数，得到了各组分的部分反应级数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radiochemistry CHEMISTRY, INORGANIC & NUCLEAR-

CiteScore

1.30

自引率

33.30%

发文量

期刊介绍： Radiochemistry is a journal that covers the theoretical and applied aspects of radiochemistry, including basic nuclear physical properties of radionuclides; chemistry of radioactive elements and their compounds; the occurrence and behavior of natural and artificial radionuclides in the environment; nuclear fuel cycle; radiochemical analysis methods and devices; production and isolation of radionuclides, synthesis of labeled compounds, new applications of radioactive tracers; radiochemical aspects of nuclear medicine; radiation chemistry and after-effects of nuclear transformations.