Synthesis, structure, and properties of new difficultly soluble complex compounds of technetium with diethylenetriaminepentaacetic acid

被引：5

作者：

German K.E. ^{[1
]}

Melent'Ev A.B. ^{[2
]}

Zubavichyus Ya.V. ^{[3
]}

Kalmykov S.N. ^{[4
]}

Shiryaev A.A. ^{[1
]}

Tananaev I.G. ^{[5
]}

机构：

[1] Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow

[2] Mayak Production Association, Federal State Unitary Enterprise, Ozersk, Chelyabinsk oblast

[3] Russian Research Centre Kurchatov Institute, Moscow

[4] Lomonosov Moscow State University, Moscow

[5] Ozersk Institute of Technology, National Research Nuclear University (Moscow Institute of Engineering Physics), Ozersk, Chelyabinsk oblast 456783

来源：

Radiochemistry | 2011年 / 53卷 / 2期

基金：

俄罗斯基础研究基金会;

关键词：

extraction reprocessing of spent nuclear fuel; polyaminocarboxylates; radiochemical technology; solid technetium compounds; spectroscopic methods;

D O I：

10.1134/S1066362211020111

中图分类号：

学科分类号：

摘要：

To elucidate the causes of formation of difficultly soluble compounds of Tc with diethylenetriaminepentaacetic acid (DTPA) used in the extraction technology for spent nuclear fuel reprocessing, these compounds were studied by X-ray diffraction, IR, Raman, UV-visible, EXAFS, and ESR spectroscopy. The features of the Tc reduction in nitric acid solutions under the action of hydrazine, preceding the precipitate formation, were considered. The compound studied contains polyaminocarboxy ligands with mixed coordination. It is polymeric and polynuclear. Aging of the precipitate is accompanied by its gradual evolution toward formation of hydrated TcO2. The Tc: DTPA ratio in the precipitate is close to 1: 1, and the prevalent valence state of Tc is IV. A possible structure of the compound was suggested on the basis of the results obtained, and ways to exclude the precipitate formation were suggested. © 2011 Pleiades Publishing, Ltd.

引用

页码：178 / 185

页数：7

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