1. Department of Earth and Environmental Sciences, Columbia University, New York, New York 10027, United States
2. Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964, United States
3. National Research Center of Geoanalysis, Chinese Academy of Geological Sciences, Beijing, China
4. Department of Geology, Union College, Schenectady, New York 12308, United States
5. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China
6. Department of Occupational and Environmental Health, University of Iowa, Iowa City, Iowa 52242, United States
7. Key Laboratory of Analytical Technology for Environmental Quality and Food Safety Control (KLATEFOS), VNU University of Science, Vietnam National University, Hanoi, Vietnam
8. Department of Environmental Sciences, Barnard College, New York, New York 10027, United States
9. Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States