有机溶剂中18-冠-6和21-冠-7衍生物萃取剂混合物从硝酸高放水中回收铯和锶

IF 0.9 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Radiochemistry Pub Date : 2023-10-23 DOI:10.1134/S106636222304001X

A. M. Koshcheeva, A. V. Rodin, A. V. Anan’ev

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引用次数: 0

摘要

研究了用大环聚醚在有机溶剂中的溶液从硝酸溶液中萃取铯和锶稳定同位素的工艺。研究了冠醚结构和溶剂类型对铯（DC）和锶（DSr）分布系数的影响。试验了以1,1,7-三氢十二氟庚醇和氯代烃为溶剂的铯和锶共萃取萃取系统。结果表明，当使用DTBDB18C6和DCH18C6的混合物时，在金属的共萃取过程中存在最高的DC和DSr。实验数据证明，在管理放射性废物时，冠醚对将铯和锶提取到单独馏分中具有高选择性。

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Recovery of Cesium and Strontium from Nitric Acid HLW with a Mixture of Extractants: 18-Crown-6 and 21-Crown-7 Derivatives in Organic Solvents

The processes of solvent extraction of cesium and strontium stable isotopes using solutions of macrocyclic polyethers in organic solvents from nitric acid solutions were studied. The influence of crown ether structure and solvent type on the distribution coefficients of cesium (D_Cs) and strontium (D_Sr) was investigated. Extraction systems for the co-extraction of cesium and strontium were tested, in which 1,1,7-trihydrododecafluoroheptanol and chlorine-substituted hydrocarbons were used as solvents. It was shown that there are highest D_Cs and D_Sr during co-extraction of metals when using a mixture of DTBDB18C6 and DCH18C6. Experimental data prove high selectivity of crown ethers for the extraction of cesium and strontium into a separate fraction when managing radioactive waste.

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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.