1. School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, P. R. China
2. Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510006, P. R. China
3. State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, P. R. China