1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry; Chinese Academy of Sciences; Guiyang China
2. University of Chinese Academy of Sciences; Beijing China
3. Department of Earth and Environmental Sciences; University of Kentucky; Lexington KY USA
4. Now at Baise University; Baise China
5. Now at Yantai Institute of Coastal Zone Research; Chinese Academy of Sciences; Yaitai China