1. School of Metallurgy and Environment Central South University Changsha Hunan 410083 China
2. School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling South China University of Technology Guangzhou Guangdong 510006 China
3. Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution Changsha Hunan 410083 China
4. Key Laboratory of Cenozoic Geology and Environment Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China
5. Beijing Key Laboratory of Mineral Environmental Function School of Earth and Space Sciences Peking University Beijing 100871 China