1. School of Environment Science and Spatial Informatics, China University of Mining and Technology, Daxue Road 1, Xuzhou 221116, China
2. College of Environmental and Resource Sciences, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, China
3. Chair of Analytical Chemistry and Water Chemistry, Technical University of Munich, Lichtenbergstrasse 4, Munich 81377, Germany
4. School of Management Engineering and Electronic Commerce, Zhejiang Gongshang University, Hangzhou 310018, China
5. College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
6. Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan