1. School of Rare Earths, University of Science and Technology of China, Hefei 230026, China
2. Jiangxi Province Key Laboratory of Cleaner Production of Rare Earths, Key Laboratory of Rare Earth, Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China
3. Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China