1. School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
2. Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
3. Oil and Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu 610500, P. R. China