Phosphate-based glasses and glass–ceramics for immobilization of simulated radioactive sludge via microwave sintering: mechanism and performance

IF 1.5 3区化学 Q3 CHEMISTRY, ANALYTICAL

Journal of Radioanalytical and Nuclear Chemistry Pub Date : 2025-01-23 DOI:10.1007/s10967-024-09906-8

Kun Huang, Gaiyuan Chen, Xiangyang Li, Yupeng Xie, Yong Liu, Yang Yang, Yuzhen Mai, Keyou Shi

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Abstract

The safe disposal of radioactive sludge generated from the use of nuclear energy is crucial. In this study, the simulated radioactive sludge was successfully vitrified via microwave sintering with the addition of NH₄H₂PO₄, forming Na₂O-Al₂O₃-Fe₂O₃-P₂O₅ (SAIP) system glass, and monazite glass–ceramic was simultaneously produced. The phase evolution, microstructure, density, and chemical stability of the sintered samples were systematically researched. The results indicated that vitrification of the sintered samples can be achieved when the NH₄H₂PO₄ content in the radioactive sludge reaches 65 wt.% at temperatures of 1200 °C and 1300 °C. The maximum solid solubility level of Nd in the glass structure was 45 wt.% at 1200 °C and 46 wt.% at 1300 °C. Moreover, the density of the sintered samples ranged from 2.62 to 3.12 g/cm³, and they exhibited excellent leaching resistance. The results of this study provide a new perspective for the safe disposal of radioactive sludge.

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来源期刊

Journal of Radioanalytical and Nuclear Chemistry 化学-分析化学

CiteScore

2.80

自引率

18.80%

发文量

504

审稿时长

2.2 months

期刊介绍： An international periodical publishing original papers, letters, review papers and short communications on nuclear chemistry. The subjects covered include: Nuclear chemistry, Radiochemistry, Radiation chemistry, Radiobiological chemistry, Environmental radiochemistry, Production and control of radioisotopes and labelled compounds, Nuclear power plant chemistry, Nuclear fuel chemistry, Radioanalytical chemistry, Radiation detection and measurement, Nuclear instrumentation and automation, etc.