1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, P.R. China
2. School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, University of Wuppertal, Wuppertal, Germany
3. Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China
4. Departments of Chemistry and Biology, National Wildlife Research Centre, Carleton University, Ottawa, Canada
5. Sustainable Agricultural Water Systems Unit, USDA, ARS, Davis, CA, USA