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Evaluation of cerium–zirconium mixed oxides for separation of 125Sb from radioactive liquid waste
Journal of Radioanalytical and Nuclear Chemistry ( IF 1.6 ) Pub Date : 2022-06-20 , DOI: 10.1007/s10967-022-08369-z
D. A. Thakur , N. L. Sonar , R. Shukla , T. P. Valsala , D. B. Sathe , R. B. Bhatt , A. K. Tyagi

Low level radioactive liquid waste (LLW) contains various radioisotopes like 125Sb, 106Ru, 99Tc and traces of 137Cs, 134Cs, 90Sr. Chemical co-precipitation method is effectively used for removal of most of the radionuclides. However, the effluent still contains traces of 125Sb and needs further processing. The present study aims at the removal of 125Sb from LLW using inorganic sorbents Na0.66Ce1.33Zr2O7 and Ce2MgZrO7. These sorbents were prepared via gel-combustion method and thoroughly characterized by XRD, SEM and BET surface area measurement. The distribution coefficient (Kd) was evaluated as a function of various parameters like total dissolved salts, effect of concentration, etc. Freundlich and Langmuir isotherms were plotted and the data is discussed in this paper.



中文翻译:

铈-锆混合氧化物从放射性废液中分离 125Sb 的评价

低放废液 (LLW) 含有多种放射性同位素,如125 Sb、106 Ru、99 Tc 和痕量的137 Cs、134 Cs、90 Sr。化学共沉淀法可有效去除大部分放射性核素。然而,流出物仍含有痕量的125 Sb,需要进一步处理。本研究旨在使用无机吸附剂 Na 0.66 Ce 1.33 Zr 2 O 7和 Ce 2 MgZrO 7从 LLW 中去除125 Sb. 这些吸附剂通过凝胶燃烧法制备,并通过 XRD、SEM 和 BET 表面积测量进行了全面表征。分配系数 (K d ) 被评估为各种参数的函数,如总溶解盐、浓度影响等。绘制了 Freundlich 和 Langmuir 等温线,并在本文中讨论了数据。

更新日期:2022-06-21
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