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Mechanical and leaching properties of neodymium‐contaminated soil glass‐ceramics
Author(s) -
Wei Guilin,
Shi Minghe,
Xu Chen,
Shu Xiaoyan,
Luo Fen,
Chen Shunzhang,
Wang Lan,
Xie Yi,
Lu Xirui
Publication year - 2021
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17713
Subject(s) - materials science , glass recycling , sintering , glass ceramic , leaching (pedology) , neodymium , ceramic , vickers hardness test , microstructure , composite material , metallurgy , soil water , laser , environmental science , physics , soil science , optics
The safe treatment of radioactive‐contaminated soil is of great significance. In this work, neodymium‐contaminated soil was successfully immobilized using microwave sintering to form glass‐ceramics. The microstructure, morphology, elemental distribution, Vickers hardness, and chemical durability of the sintered samples were analyzed. The results showed that the glass‐ceramic is more suitable to immobilize the waste compared with the glass matrix. XRD and SEM‐EDS results proved that the waste form has been totally immobilized in the sintered matrix whether in glass‐ceramics and glass. However, the leaching rate of element Nd in glass‐ceramic was lower than the glass matrix at 28 d. Moreover, the Vickers hardness results of glass‐ceramic were higher than that of glass. Thus, glass‐ceramics can not only reduce sintering temperature and save energy but also achieve a better immobilizing effect. Our investigation reflects that glass‐ceramics are more suitable for neodymium‐contaminated soil immobilization using the microwave sintering method.