1 School of Ecology and Environmental Sciences, Yunnan University, Kunming, 650091, Yunnan, China.
2 Analysis and Measurements Center of Yunnan Provincial Non-ferrous Geology Bureau, Kunming, 650051, Yunnan, China.
3 Great Lakes Institute for Environmental Research, University of Windsor, Windsor, ON, N9B3P4, Canada.
4 School of Marine and Atmospheric Science, State University of New York, Stony Brook, NY, 11794, USA.
5 Department of Earth and Environmental Studies, Montclair State University, Montclair, NJ, 07043, USA.
6 Department of Soil Science and Geology, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture in Nitra, 94976, Nitra, Slovak Republic.
7 School of Ecology and Environmental Sciences, Yunnan University, Kunming, 650091, Yunnan, China. changxx@ynu.edu.cn.