1. Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China
2. Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China
3. Department of Chemical Engineering, Water Innovation & Research Centre (WIRC@Bath), University of Bath, Bath BA2 7AY, U.K.
4. Department of Land, Air, and Water Resource, University of California, Davis, California 95616, United States
5. Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States