用相分离法从模拟高放射性废弃玻璃中回收Se、Zr、Pd和Cs

IF 2.1 3区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS International Journal of Applied Glass Science Pub Date : 2022-07-12 DOI:10.1111/ijag.16600
Hiroyuki Inoue, Yasuhiro Watanabe, Jaeyeop Chung, Kazuro Kizaki, Atsunobu Masuno
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引用次数: 0

摘要

在这项研究中,元素回收进行了相分离模拟高放射性废物(HLW)玻璃。为了实现相分离,在模拟的高分子量玻璃中加入SiO2和B2O3,并将SiO2: B2O3与其他氧化物的比例调整为40:50:10。将相分离玻璃在0-3 mol/L的HNO3、H2SO4和1:1的HCl-HNO3水溶液中,在363 K下浸泡20 h,考察17种元素的溶解行为。各元素的溶解质量分数与浸液中酸浓度之间的关系可以用修正的s型函数近似表示。采用四阶段浸出工艺,将样品依次浸在蒸馏水、HNO3、H2SO4和1:1的HCl-HNO3的水溶液中,浸出时间为363 K,浸出时间为20 h,测试了稳定核Se、Zr、Pd和Cs的选择性回收。此外,还可以根据上述单个溶出结果预测回收率。
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Recovery of Se, Zr, Pd, and Cs from simulated high-level radioactive waste glass through phase separation

In this study, elemental recovery was performed using phase separation from simulated high-level radioactive waste (HLW) glass. To cause phase separation, SiO2 and B2O3 were added to the simulated HLW glass and adjusted the ratio of SiO2: B2O3: other oxides to 40:50:10. The phase separated glass was immersed in aqueous solutions of 0–3 mol/L of HNO3, H2SO4, and a 1:1 mixture of HCl–HNO3 at 363 K for 20 h, and the dissolution behavior of 17 elements was examined. The relationship between the dissolved mass fraction of each element and the acid concentration in the immersion liquid could be approximated by the modified sigmoid function. The recovery of stable nuclei Se, Zr, Pd, and Cs instead of long-lived radioactive nuclei was tested using a four-stage leaching process in which the sample was immersed sequentially in four aqueous solutions at 363 K of distilled water, HNO3, H2SO4, and a 1:1 mixture of HCl–HNO3 for 20 h. It was confirmed that Se, Zr, Pd, and Cs could be recovered selectively. Furthermore, the recovery result could be predicted based on the individual dissolution results described above.

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来源期刊
International Journal of Applied Glass Science
International Journal of Applied Glass Science MATERIALS SCIENCE, CERAMICS-
CiteScore
4.50
自引率
9.50%
发文量
73
审稿时长
>12 weeks
期刊介绍: The International Journal of Applied Glass Science (IJAGS) endeavors to be an indispensable source of information dealing with the application of glass science and engineering across the entire materials spectrum. Through the solicitation, editing, and publishing of cutting-edge peer-reviewed papers, IJAGS will be a highly respected and enduring chronicle of major advances in applied glass science throughout this century. It will be of critical value to the work of scientists, engineers, educators, students, and organizations involved in the research, manufacture and utilization of the material glass. Guided by an International Advisory Board, IJAGS will focus on topical issue themes that broadly encompass the advanced description, application, modeling, manufacture, and experimental investigation of glass.
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