Earth Science Frontiers ›› 2008, Vol. 15 ›› Issue (6): 90-99.
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1State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
2Chemistry Engineering College, Guizhou University, Guiyang 550003, China
3Key Laboratory of Karst Environment and Geohazard Prevention, Ministry of Education, Guizhou University, Guiyang 550003, China