1. College of Earth Science, Chengdu University of Technology, Chengdu 610059, China
2. State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, Chengdu 610059, China
3. Geological Engineering Department, Montana Technological University, Butter, MT 59701, USA
4. College of Tourism and Urban-Rural Planning, Chengdu University of Technology, Chengdu 610059, China
5. College of Ecological Environment, Chengdu University of Technology, Chengdu 610059, China