1. Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, P. R. China
3. School of Chemicals Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
4. Independent Researcher, 25 Tuscany Springs Territory NW, Calgary, Alberta T3L 2 V2, Canada