Human exposures to particulate matter is among the leading causes of premature death worldwide. Particles in the air are also known to have large, but uncertain effects on the radiative balance of the earth. The health and climate effects of particulate matter depends on their chemical and physical properties, which reflect their origins and atmospheric processing. Research in the Stone Group combines analytical, environmental, and organic chemistry to advance our understanding of the chemical composition and sources of atmospheric particulate matter. We use chromatography and mass spectrometry to improve measurements of atmospheric pollutants and source apportionment techniques to link pollution to its sources.
- Characterization of emissions from combustion of biomass and other fuels through laboratory and field studies.
- Source apportionment of ambient particulate matter to its sources in urban areas in the United States.
- Development of instrumental methods for the separation and quantification of organosulfates in atmospheric aerosols, using ultra-performance liquid chromatographs (UPLC) and tandem mass spectrometers (MS/MS) in the University of Iowa's Mass Spectrometry Facility (HRMSF).
- Determination of the sources and radiative properties of organosulfates and organic aerosol in the 2013 Southeast Atmosphere Study (SAS).
- In the NSF CCI, Center for Aerosol Impacts on Climate and the Environment (CAICE), our mission is to transform our ability to accurately predict the impact of aerosols on climate and the environment. We apply analytical techniques to measure the molecular constituents of sea spray aerosol and its variation with biological processes in the ocean.
- Population exposures to bioaerosols across Iowa are examined through the lens of chemical and biological tracers, in collaboration with the Environmental Health Sciences Research Center (EHSRC).