Structure and quantification of Ce3+/Ce4+ and stability analysis of basaltic glasses for the immobilization of simulated tetravalent amines

Qin Tong; Song Liu; Jun Liang; Qi Zhang; Meiying Liao

doi:10.1038/s41598-025-86571-1

Structure and quantification of Ce³⁺/Ce⁴⁺ and stability analysis of basaltic glasses for the immobilization of simulated tetravalent amines

Sci Rep. 2025 Jan 17;15(1):2288. doi: 10.1038/s41598-025-86571-1.

Authors

Qin Tong¹, Song Liu², Jun Liang³, Qi Zhang⁴, Meiying Liao³

Affiliations

¹ College of Mechanical and Electrical Engineering, Mianyang Teachers' College, Mianyang, 621000, China. tongqin518@163.com.
² Sichuan Jiuzhou Electric Group Co., Ltd., Mianyang, 621000, China.
³ College of Mechanical and Electrical Engineering, Mianyang Teachers' College, Mianyang, 621000, China.
⁴ School of Intelligent Manufacturing, Chengdu Technological University, Chengdu, 610000, China.

Abstract

Basaltic glass was prepared via the solid-state melt method, using Ce⁴⁺ to simulate tetravalent actinides. The structure, thermal stability and leaching characteristics of basaltic glass with different contents of CeO₂ were investigated. The XRD/SEM-EDX/Raman results showed that the simulated waste loading of CeO₂ in basaltic glass reached ~ 18 wt%, and CeO₂ crystals precipitated when the CeO₂ content reached 20 wt%. XPS analysis revealed that approximately half of the Ce⁴⁺ ions in the basaltic glass doped with CeO₂ were reduced to Ce³⁺ ions. The DSC results showed that the thermal stability increased with increasing CeO₂ content. The ASTM product consistency test (PCT) results indicated that all the samples had good leaching resistance. Among them, the standard mass loss of Ce was the greatest after 28 days: The NL_Ce was 2 orders of magnitude lower than those of the other elements.

Keywords: Basaltic glass; CeO2; Leaching characteristics.

Abstract

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