1. Institute
of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China
2. Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, Hunan 410083, China
3. Department
of Environmental Science and Analytical Chemistry, Stockholm University, Svante Arrhenius väg 8, Stockholm SE-11418, Sweden
4. Department
of Chemistry and Biochemistry, National Chung Cheng University, Minxiong, Chia-Yi 62102, Taiwan