1Singapore Membrane Technology Center, Nanyang Environment and Water Research Institute, Interdisciplinary Graduate School, Nanyang Technological University, Singapore 637141, Singapore
2School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 639798, Singapore
3Singapore Membrane Technology Center, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore
4Division of Environmental and Water Resources, School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore