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Principal Investigator
Qi Zhang, PhD
Donald G. Crosby Endowed Chair in Environmental Chemistry
Professor, Department of Environmental Toxicology, University of California at Davis
Chair of the Agricultural and Environmental Chemistry Graduate Group at UC Davis
Address: 4251A Meyer Hall, 1 Shields Ave., Davis, CA 95616
Tel: (530) 752-5779 (Office), (530) 752-2541 (Lab)
Email: dkwzhang@ucdavis.edu
Graduate groups memberships:
Agricultural and Environmental Chemistry
Postdoctoral Scientist
Postdoctoral Scientist
Wenqing Jiang
Postdoctoral Researcher, since Jan 2023
Education:
Ph.D., Atmospheric chemistry, University of California, Davis, 2022
Research (Key Funding Sources: CARB 22RD038, NSF AGS-2220307)
Labortory and field studies of aqueous-phase chemistry of atmospheric organic aerosols using real-time aerosol mass spectrometry
Integrating AMS and LToF-CIMS with advanced analysis to characterize aerosol sources and transformations in polluted urban environments
Email: gwqjiang@ucdavis.edu
Ashutosh Shukla
Postdoctoral Researcher, since July 2024
Education:
Ph.D., Inidian Institute of Technology (IIT), 2024
Research (Key Funding Sources: CARB 22RD038, 24RD013)
Long-term chemical characterization and source apportionment of PM₂.₅ in California’s San Joaquin Valley
Characterizing brake and tire wear emissions in overburdened communities within the San Joaquin Valley
Email: akshukla@ucdavis.edu
Christopher Niedek
Postdoctoral Researcher, since Oct. 2025
Education:
PhD, Atmospheric chemistry, University of California, Davis 2025
Research (Key Funding Sources: CARB 25RD002)
Operationalization of the California High Resolution Advanced Monitoring Program (CHAMP) network
Comprehensive characterization of spatial and temporal variability in PM₂.₅ across California, focusing on emission sources, chemical evolution, and meteorological influences
Email: crniedek@ucdavis.edu
Graduate Students
Graduate Students
Justin Trousdell
PhD candidate, Atmospheric Science, 2021 - present
Education:
B.S. Applied Physics w/ concentration on Atmospheric Physics, UC Davis
M.S. Atmospheric Science, UC Davis
Research (Key Funding Sources: DOE DE-SC0022140, CARB 22RD038):
Investigating aqueous processing and aerosol chemical climatology using DOE ARM and ASR observations
Assessing biomass burnings emission (wildfires, residential woodburning, and prescribed burns) and their impacts on PM pollution in California
Advancing AI-assisted multivariate analysis of long-term aerosol mass spectrometry measurements
Email: jftrousdell@ucdavis.edu
Antai Zhang
PhD student, Agricultural and Environmental Chemistry, 2024 - present
Education:
B.S. in Environmental Science and Engineering, SUSTech, 2021
M.S. in Biology, Southern University of Science and Technology of China (SUSTech), 2024
Research (Key Funding Sources: NSF AGS-2220307; AGS-2308645):
Laboratory investigation of aqueous-phase reaction pathways and kinetics governing secondary organic aerosol formation from mixed biomass burnign VOCs .
Formation of photo-oxidants and transformation of organic species within aerosol liquid water
Email: teocastro@ucdavis.edu
Researcher
Jiang Huo
Assistant Specialist, since 2025
Education:
Research:
Chemical characterization of atmospheric particulate matter
Email: jkhuo@ucdavis.edu
Alumni
Heidi Hoi-Yan Cheung
visiting student, 2014 - 2015
Education:
Ph.D. student, Environmental Science, Policy and Management, Hong Kong University of Science and Technology, 2011 - present
B.Eng. in Chemical Engineering, Hong Kong University of Science and Technology, 2011
Email: cheunghy.heidi@gmail.com
Sonya CollierPostdoctoral Scholar, 2011 - 2017
Education:
PhD Mechanical Engineering, University of Southern California, 2009
B.S. Astronautical Engineering, University of Southern California, 2003
Current affiliation: Air Resources Engineer, California Air Resource Board
Email: scollier@ucdavis.edu
Katja Dzepina
Visiting Scholar, 2016
Education:
Ph.D. in Physical/Analytical/Atmospheric Chemistry, University of Colorado at Boulder, 2009
B.S. in chemistry, University of Zagreb, Croatia, 1999
Current affiliation: Department of Biotechnology, University of Rijeka, Croatia, Nov 2014 - present
Email: dzepina@gmail.com
Ryan Farley
2018 - 2023, PhD, Agricultural and Environmental Chemistry
Education:
B.A., in Chemistry, Vassar College, 2017
Research:
- Atmospheric processing of biomass burning organic aerosols
- Atmospheric aging, aqueous-phase processing, and sources of black carbon aerosols
Email: rnfarley@ucdavis.edu
Xinlei Ge
2011 - 2014, postdoctoral scholar
Education:
PhD Metallurgical Physical Chemistry, University of Science and Technology Beijing(USTB), 2009
PhD Materials Science and Engineering, Royal Institute of Technology Sweden(KTH), 2009
B.S. Metallurgy, University of Science and Technology Beijing(USTB), 2003
Current affiliation: Professor, Nanjing University of Information Science & Technology
Email: caxinra@163.com
Lihui Han
2014 - 2015, visiting scholar
2014 - 2015, visiting scholar
Education:
PhD Department of Chemistry, Beijing Normal University, China, 2005
M.S. Environmental Engineering, Lanzhou Jiaotong University, 1992
Email: hlhbjut@gmail.com
Hwajin Kim
2013 - 2014, postdoctoral scholar
Education:
PhD Atmospheric Chemistry, UCLA, 2012
M.S. Environmental Science and Engineering, Postech, 2007
B.S Environmental Science and Engineering, Younsei University, 2004
Current affiliation: Assistant professor, National Seoul University, South Korea
Email: hwajinkim0116@gmail.com
Ryan Katz
UG researchers 2022 - 2023
Forensic Chemistry, UC Davis, 2021 - present
Research:
Chemical and toxicological analysis of atmospheric particulate matter using advanced analytical techniques
Email: rjkatz@ucdavis.edu
Haiyan Li
2016 - 2017, visiting student
Education:
B.S. in Environmental Science and Engineering, Shandong University, China, 2013
Current affiliation: Assistant professor, Harbin Institute of Technology, Shenzhen, China
Visiting Scholar
Jianjun Li
Visiting Scholar, 2017 - present
Education
Ph.D, Chemical Engineering, Xi’an Jiaotong University, 2011
B.S., Environmental Engineering, Xi’an Polytechnic University, 2006
Research
Heterogeneous formation of secondary organic aerosols; Impact of organic aerosols on Haze formation in China; Effects of anthropogenic pollution on Biogenic Secondary Organic Aerosol (BSOA).
Email: lijj@ieecas.cn
Nutthakarn Soiseng
Masters student, Agricultural and Environmental Chemistry, 2021
Education:
B.A., in Chemistry, University of San Francisco
Email: nsoisaeng@ucdavis.edu
Caroline Parworth
2011 - 2017, Ph.D. student, Agricultural and Environmental Chemistry
Education:
Ph.D. in Agricultural and Environmental Chemistry, University of California, Davis, 2017
B.S. in Chemistry, University of North Carolina of Asheville, 2010
B.A. in Applied Mathematics, University of North Carolina of Asheville, 2010
Current affiliation: Postdoc, NASA
Email: clparworth@ucdavis.edu
Ari Setyan, PhD2010 – 2012, postdoctoral scholar
Education:
Ph.D. Life Sciences, University of Lausanne (Switzerland), 2009
M.S. Chemistry, University of Geneva (Switzerland), 2002
B.S. Chemistry, University of Geneva (Switzerland), 2001
Current affiliation: Chemist R&D, Head of Laboratory and of Quality Management at Le Labo AE, Switzerland
Email: ari.setyan@empa.ch
Kojiro Shimada, PhD
2011 - 2011, visiting graduate student
Current affiliation: Postdoctoral scholar, Tokyo University of Agriculture and Technology
Email: k.shimada.0505.hym@gmail.com
Nalin Singh
Undergraduate, Environmental Toxicology with emphasis in Chemical Fate, 2013 - present
Research:
- Statistical analysis of the ion chromatography data collected for aerosol samples
Email: nalsingh@ucdavis.edu
Yele Sun, PhD
2006 - 2010, postdoctoral scholar
Education:
Ph.D. Department of Chemistry, Beijing Normal University, 2006
B.S. Department of Chemistry, Beijing Normal University, 2001
Current affiliation: Professor, Institute of Atmospheric Physics, Chinese Academy of Sciences
Email: sunyele@gmail.com
Jian Tian, M.S.
2007 - 2009, M.S. in Atmospheric Science, State University of New York at Albany
Current affiliation: PhD student, University of Illinois at Urbana-Champaign
Email: tianjian83@gmail.com
Minmeng Tang
Ph.D. student, Atmospheric Science, 2016 - present
Education:
M.S. in Environmental Engineering, University of Michigan, Ann Arbor, 2016
B.Eng. in Environmental Engineering, Monash University, 2013
B.Eng. in Environmental Engineering, Tongji University, 2013
Research:
Email: mmtang@ucdavis.edu
Jiayuan Wang
Visiting Scholar, 2018 - present
Education:
B.S., Environmental Science, Sichuan University, 2009
M.S., Environmental Science, Sichuan University, 2012
Ph.D., Environmental Science, Institute of Earth Environment, Chinese Academy of Sciences, 2017
Research:
Compositions and aging processes of diacids, aiming to better understand the formation mechanism of SOA
Email: wangjy@ieecas.cn
Jun-feng Wang
2015 - 2016, visiting student
Education:
M.S. in Environmental Science, Nanjing University of Information Science & Technology, China, 2012
B.S. in Information Engineering, Chengdu University of Technology, China, 2009
Current affiliation: Professor, Nanjing University of Information Science & Technology
Ningxin Wang
Postdoc, 2018 - 2019
Education:
Ph.D., Chemical Engineering, Carnegie Mellon University, 2018
B.S., Chemical Engineering, the University of Arizona, 2012
B.S., Environmental Science and Engineering, Shanghai Jiao Tong University, 2012
Email: nwang@ucdavis.edu
Qingqing Wang
2017, Visiting Scholar
Education:
Ph.D. in Atmospheric Physics and Atmospheric Environment, Institute of Atmospheric Physics, Chinese Academy of Sciences, 2016
M.S. in Atmospheric Physics and Atmospheric Environment, University of Chinese Academy of Sciences, 2013
B.S. in Chemical Engineering and Technology, Nanjing Forestry University, 2009
Current affiliation:
- Assistant Professor, Institute of Atmospheric Physics, Chinese Academy of Sciences
Email: wangqingqing@mail.iap.ac.cn
Jinfang Xie, PhD
2011 - 2011, visiting scholar
Current affiliation: Professor, Shanxi University
Email: xiejf@sxu.edu.cn
Jianzhong Xu, PhD
2011 - 2014, visiting scholar
Education:
PhD in Geography, Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences (China), 2008
B.S. in Atmospheric Science, University of Lanzhou (China), 2002
Current affiliation: Professor, Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences
Email: jzxu78@gmail.com
Zhaolian Ye, PhD
2014 - 2015, visiting scholar
Education:
PhD in Environmental Science, Institute of Environmental Science, Fudan University (China), 2009
M.S. in Environmental Engineering, Nanjing University of Technology (China), 2002
Email: zlye@ucdavis.edu
Dominique Young
2015 - 2016, Postdoctoral Scholar
Education:
PhD in Atmospheric Sciences, University of Manchester, UK, 2014
MESc. in Earth Sciences, University of Oxford, UK, 2010
Current affiliation: Laboratory Quality Assurance Officer at the Air Quality Group, University of California, Davis.
Email: deyou@ucdavis.edu
Lu Yu, PhD
2010 - 2015, Ph.D. student, Agricultural and Environmental Chemistry
Education:
Ph.D. in Agricultural and Environmental Chemistry, UC Davis, 2015
M.S. in Environmental Science, Rutgers University, 2010
Current affiliation: BOE technologies, Inc.
Email: yulu0704@gmail.com
Shan Zhou
2011 - 2017, Ph.D. student, Atmospheric Science
Education:
Ph.D., Atmospheric Science, University of California, Davis, 2017
B.S., Atmospheric Science, Sun Yat-sen University, 2011
Current affiliation: Research Scientist, University of Houston
Email: hszhou@ucdavis.edu
Yuejun Zhou
UG researcher 2022 -2023
Applied Chemistry, UC Davis, 2020 - present
Research:
Aqueous phase chemical reactions of biomass burning organic gases.
Email: yjnzhou@ucdavis.edu
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