1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. School of Earth Sciences, China University of Geosciences, Wuhan 430074, China
4. Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto H3A 2S9, Canada
5. College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China