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

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发表日期：

2024年6月1日

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

摘要

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.