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

被引：0
作者：
Huang, Kun [1 ]
Chen, Gaiyuan [2 ]
Li, Xiangyang [1 ]
Xie, Yupeng [1 ]
Liu, Yong [1 ,2 ]
Yang, Yang [1 ]
Mai, Yuzhen [1 ]
Shi, Keyou [1 ]
机构：
[1] Univ South China, Sch Resource & Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China
[2] Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2025年 / 334卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Radioactive sludge; Microwave sintering; Amorphous glass; Monazite; NUCLEAR-WASTE; CHEMICAL DURABILITY; RAPID IMMOBILIZATION; CRYSTALLIZATION; ZIRCONOLITE; DISPOSAL; FEATURES; SPECTRA; PHASE; ND;
D O I：
10.1007/s10967-024-09906-8
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
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 degrees C and 1300 degrees C. The maximum solid solubility level of Nd in the glass structure was 45 wt.% at 1200 degrees C and 46 wt.% at 1300 degrees 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.
引用
收藏
页码：1691 / 1702
页数：12
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