1. State Key Laboratory of Urban Water Resources Centre, School of Environment, Harbin Institute of Technology, Harbin, 150090, P. R. China
2. Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Dr 2, Singapore, 117576, Singapore
3. Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
4. School of Environmental Ecology and Biological Engineering, School of Chemistry and Environmental Engineering, Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Wuhan Institute of Technology, Wuhan, Hubei, 430205, P. R. China