| Affiliation: | 1. State Key Laboratory of Environmental Friendly Energy Materials, Southwest University of Science and Technology, Mianyang, PR China;2. Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, PR China;3. Institute of Materials, China Academy of Engineering Physics, Mianyang, PR China;4. Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, PR China
Collaborative Innovation Center of Nuclear Wastes and Environmental Safety, Southwest University of Science and Technology, Mianyang, PR China;5. Institute of Nuclear Science and Technology, Sichuan University, Chengdu, PR China;6. University of Science and Technology of China, Hefei, PR China;7. Collaborative Innovation Center of Advanced Nuclear Energy Technology, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, PR China |
| Abstract: | 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. |
