1. School of Resources and Environmental Engineering, Anhui University, Hefei, China
2. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, China
3. School of Earth Sciences, East China University of Technology, Nanchang, China
4. School of Earth and Environment, Anhui University of Science and Technology, Huainan, China
5. School of Earth Sciences and Engineering, Hohai University, Nanjing, China