1. Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Kowloon 999077, Hong Kong, China
2. Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch), The Hong Kong University of Science and Technology, Kowloon 999077, Hong Kong, China
3. Water Technology Center, The Hong Kong University of Science and Technology, Kowloon 999077, Hong Kong, China
4. Civil and Environmental Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
5. Department of Biotechnology, Delft University of Technology, Delft, 2628 CD, The Netherlands