1. College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, P. R. China
2. State Key Laboratory of Geo-Hazard Prevention and Earth Environment Protection, Chengdu 610059, Sichuan, P. R. China
3. College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, Sichuan, P. R. China
4. Panzhihua Pangang Group Ming Company, Panzhihua, 617000, Sichuan, P. R. China