1. Southwest University of Science & Technology, Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Mianyang, Sichuan, China
2. College of Environment and Resources, Southwest University of Science & Technology, Mianyang, Sichuan, China
3. School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, China
4. School of Resources and Environment, Xichang University, Xichang, Sichuan, China