1. College of Safety Engineering, Chongqing University of Science and Technology, Chongqing 401331, P. R. China
2. College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
3. Department of Engineering, School of Engineering and Technology, Sunway University, Bandar Sunway, Selangor 47500, Malaysia