Sorption Recovery of Cesium from High Level Alkaline Waste from Mayak Production Association

IF 0.9 Q4 CHEMISTRY, INORGANIC & NUCLEAR Radiochemistry Pub Date : 2024-07-16 DOI:10.1134/S106636222403007X

K. A. Feoktistov, D. V. Markova, P. V. Kozlov, S. M. Shaydullin, V. V. Milyutin, N. A. Nekrasova, M. V. Tutov, A. M. Yegorin

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Abstract

The results of the sorption of ¹³⁷Cs from the clarified phase of accumulated high-level alkaline radioactive waste of the Mayak Production Association with sorbents based on modified nickel ferrocyanide (Fersal) and resorcinol–formaldehyde resin (RFS-I) in batch and flow conditions are presented. In batch mode, the distribution coefficient of ¹³⁷Cs on Fersal and RFS-I sorbents is 2300 and 730 cm³/g, respectively. In flow mode, the volume of the passed solution before the ¹³⁷Cs breakthrough for Fersal and RFS-I sorbents is 140 and 85 column volumes, and the maximum purification factor is 10⁴ and 10³, respectively. To desorb cesium from the Fersal and the RFS-I, 8 M HNO₃ and 1 M HNO₃ solutions, respectively, were used. A decrease in the sorption characteristics of the RFS-I sorbent during the sorption of cesium from high-level alkaline radioactive waste was discovered. A conclusion was made about the possibility of using the Fersal sorbent for the recovery of ¹³⁷Cs from high-level alkaline radioactive waste of the Mayak Production Association.

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从玛雅克生产协会的高浓度碱性废物中吸附回收铯

摘要介绍了在间歇和流动条件下使用基于改性亚铁氰化镍（Fersal）和间苯二酚-甲醛树脂（RFS-I）的吸附剂吸附马雅克生产协会积累的高放射性碱性废物澄清相中 137Cs 的结果。在间歇模式下，137Cs 在 Fersal 和 RFS-I 吸附剂上的分布系数分别为 2300 和 730 cm3/g。在流动模式下，Fersal 和 RFS-I 吸附剂在 137Cs 突破前的通过溶液体积分别为 140 和 85 柱体积，最大净化系数分别为 104 和 103。为了解吸 Fersal 和 RFS-I 吸附剂中的铯，分别使用了 8 M HNO3 和 1 M HNO3 溶液。在吸附高浓度碱性放射性废物中的铯时，发现 RFS-I 吸附剂的吸附特性有所下降。结论是可以使用 Fersal 吸附剂从马雅克生产协会的高放射性碱性废物中回收 137Cs。

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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.