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