1. College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China
2. School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
3. School of Chemical and Biomedical Engineering, Singapore Membrane Technology Centre, Nanyang Environmental and Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore