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. Centre for Water Technology (WATEC) & Department of Engineering, Aarhus University, Hangøvej 2, Aarhus N DK-8200, Denmark
4. Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
5. Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, Ohio 45221, United States
6. Department of Chemistry, University of Turin, Via Pietro Giuria 5, Torino 10125, Italy
7. State Key Laboratory of Powder Metallurgy, School of Physics and Electronics, Central South University, Changsha 410083, China