Sorption of Cs, Np, and Pu by the rocks of the Yeniseisky site depending on the temperature and ionic strength of Mg-K-phosphate leaching solutions

IF 0.4 4区工程技术 Q4 NUCLEAR SCIENCE & TECHNOLOGY

Atomic Energy Pub Date : 2024-09-16 DOI:10.1007/s10512-024-01133-4

A. A. Rodionova, S. A. Fimina, S. S. Vorobey, S. E. Vinokurov

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Abstract

The study of radionuclide migration is of particular concern in when substantiating safety procedures involved in the deep disposal of radioactive waste in the host rocks of the Yeniseisky site located in Krasnoyarsk Krai. One of the main processes controlling the migration of radionuclides is the sorption by mineral phases of host rocks. The present work aims to obtain quantitative characteristics of ¹³⁷Cs, ²³⁷Np, and ²³⁹Pu sorption by the rocks of the Yeniseisky site under conditions simulating a deep disposal of radioactive waste. The distribution coefficients of ¹³⁷Cs, ²³⁷Np, and ²³⁹Pu were determined depending on the ionic strength and temperature of the solutions after leaching the Mg-K-phosphate compound. Differences in the effect of K⁺ and Mg²⁺ cations on cesium sorption by the rocks were established. At an increase in the temperature, the efficiency of ²³⁹Pu and ²³⁷Np sorption by the rocks increases, while the sorption of ¹³⁷Cs remains almost constant.

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叶尼塞斯基矿址岩石对铯、镎和钚的吸附取决于 Mg-K- 磷酸盐沥滤溶液的温度和离子强度

在证实位于克拉斯诺亚尔斯克边疆区叶尼塞斯基（Yeniseisky）场址的主岩中放射性废物深层处置的安全程序时，放射性核素迁移的研究尤为重要。控制放射性核素迁移的主要过程之一是主岩矿物相的吸附作用。本研究的目的是在模拟放射性废物深层处置的条件下，获得叶尼塞斯基遗址岩石对 137Cs、237Np 和 239Pu 吸附的定量特征。137Cs、237Np 和 239Pu 的分布系数取决于 Mg-K- 磷酸盐化合物浸出后溶液的离子强度和温度。确定了 K+ 和 Mg2+ 阳离子对岩石吸附铯的影响差异。温度升高时，岩石对 239Pu 和 237Np 的吸附效率增加，而对 137Cs 的吸附几乎保持不变。

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

Atomic Energy 工程技术-核科学技术

CiteScore

1.00

自引率

20.00%

发文量

100

审稿时长

4-8 weeks

期刊介绍： Atomic Energy publishes papers and review articles dealing with the latest developments in the peaceful uses of atomic energy. Topics include nuclear chemistry and physics, plasma physics, accelerator characteristics, reactor economics and engineering, applications of isotopes, and radiation monitoring and safety.