1. College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
2. Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
3. Res Inst Ind Hazardous Waste Disposal & Resource, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China