Manganese(III,IV) Oxide-Based MDM Sorbent: Production, Sorption Characteristics, and Application for Purification of Liquid Radioactive Waste from Strontium and Radium Radionuclides

IF 0.9 Q4 CHEMISTRY, INORGANIC & NUCLEAR Radiochemistry Pub Date : 2024-10-06 DOI:10.1134/S106636222404009X

V. V. Milyutin, O. A. Kononenko, N. A. Nekrasova

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Abstract

The optimal conditions for the synthesis of a pelletized sorbent based on mixed Mn(III, IV) oxide by reacting aqueous solutions of MnSO₄ and KMnO₄ in an alkaline medium were determined: Mn²⁺/MnO₄^– molar ratio 1.70–1.80; pH of the reaction mixture 11.0–12.5; calcination temperature 220°C. For the sorbent fabricated under optimal conditions, the values of the distribution coefficient (K_d) of ⁹⁰Sr in 0.01 M CaCl₂ solution, static exchange capacity for calcium, hydromechanical strength of granules, and K_d of ⁹⁰Sr as a function of the concentration of sodium and calcium ions were established. The sorbent afforded higher sorption characteristics with respect to strontium compared to known sorbents. A technology for producing pilot batches of the sorbent named MDM, was developed. Examples of the use of the MDM sorbent for the purification of various types of liquid radioactive waste from strontium and radium radionuclides are reported.

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基于氧化锰（III,IV）的 MDM 吸附剂：锶和镭放射性核素的生产、吸附特性以及在液体放射性废物净化中的应用

通过在碱性介质中反应 MnSO4 和 KMnO4 的水溶液，确定了合成基于混合氧化锰（III、IV）的颗粒状吸附剂的最佳条件：Mn2+/MnO4-摩尔比为 1.70-1.80；反应混合物的 pH 值为 11.0-12.5；煅烧温度为 220°C。对于在最佳条件下制造的吸附剂，确定了 90Sr 在 0.01 M CaCl2 溶液中的分布系数 (Kd)、钙的静态交换容量、颗粒的水力学强度以及 90Sr 的 Kd 值与钠离子和钙离子浓度的函数关系。与已知的吸附剂相比，该吸附剂对锶具有更高的吸附特性。开发了一种名为 MDM 的吸附剂试制技术。报告了使用 MDM 吸附剂净化各类液体放射性废物中的锶和镭放射性核素的实例。

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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.