Environmental Health Sciences Research Center

University of Iowa College of Public Health

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Betsy Stone, PhD

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Center Affiliation and Expertise: Director, Pilot Grant Program;  Nanoscience Thematic Area

Research in the Stone group focuses on the advancement of methodology to study the chemical composition of particulate matter in the atmosphere, or aerosols. Aerosols play an important role in regulating global climate by reflecting solar radiation and altering cloud formation and lifetime. Elevated levels of particulate matter also negatively affect human health. The chemistry of aerosols is complex and varies drastically across different regions of the world. Our research targets the organic fraction of ambient aerosol, which constitutes an average of half of particulate mass and remains the most poorly understood component due to its chemical complexity, variety of sources, and ability to transform in the atmosphere. We develop new methodology to study organic compounds and functional groups in aerosols and apply these techniques to different environmental settings. Our research incorporates field-based and laboratory experiments and utilizes a variety

 

Publications:

  • Downard, J.; Singh, A.; C.; Bullard, R.; Jayarathne, K. T. M. S.; Rathnayake, C.; Simmons, D.; Wels, B. R.; Spak, S.; Peters, T.; Beardsley, D.; Stanier, C.; Stone, E. A. Uncontrolled combustion of shredded tires in a landfill, Part 1: Characterization of gaseous and particulate emissions from a large-scale tire fire. Atmospheric Environment, 2015, 104, 195-204, doi: 10.1016/j.atmosenv.2014.12.059
  • Singh, A.; Spak, S.; Stone, E. A.; Downard, J.; Bullard, R.; Pooley, M.; Kostle, P.; Mainprize, M.; Wichman, M.; Peters, T.; Beardsley, D.; Stanier, C. Uncontrolled combustion of shredded tires in a landfill, Part 2: Population Exposure, Public Health Response, and an Air Quality Index for Urban Fires. Atmospheric Environment, 2015, 104, 273-283, doi: 10.1016/j.atmosenv.2014.12.059.
  • Al Naiema, I., Mudukotuwa, I.; Estillore, A.; Grassian, V. H., Stone, E. A. Impacts of Co-firing Biomass on Emissions of Particulate Matter to the Atmosphere. Fuel, 2015 162, 111-120, doi:10.1016/j.fuel.2015.08.054.
  • Jayarathne, T.; Stockwell, C.; Yokelson, B.; Nakao, S.; Stone, E. A. Fluoride emissions from biomass burning. Environmental Science & Technology, 2014, 48 (21): 12636-12644, doi: 10.1021/es502933.
  • Liu, Shang; Aiken, A. C.; Arata, C.; Dubey, M.; K.; Stockwell, C. E.; Yokelson, R. J.; Stone, E. A.; Jayarathne, T.; Robinson, A.; DeMott, P. J.; Kreidenweis, S. M. Aerosol single scattering albedo dependence on biomass combustion efficiency: Laboratory and field studies. Geophysical Research Letters, 2014, 41 (2), 742-748. doi: 10.1002/2013GL058392
  • Washenfelder, R. A.; Attwood, A. R; Guo, J.; Weber, R. J.; Brock, C. A.; Brown, S. S.; Allen, H. M.; Ayres, B. R.; Baumann, K.; Cohen, R. C.; Draper, D. C.; Duffey, K. C.; Edgerton, E.; Fry, J. L.; Hu, W.; Jimenez, J. L.; Ng, N. L.; Palm, B.; Romer, R.; Stone, E. A.; Wooldridge, P. J.; Xu, L. Biomass burning dominates brown carbon aerosol in the rural Southeastern United States. Geophysical Research Letters, 2015, 43, doi: 10.1002/2014GL062444.
  • Stone, E. A.; Yang, L. M.; Yu, L. E.; Rupakheti, M., Characterization of organosulfates in atmospheric aerosols at four Asian locations, Atmospheric Environment, 2012, 47, 323-329, doi:10.1016/j.atmosenv.2011.10.058
  • Kundu, S.; Quraishi, T.; Yu, G.; Suarez, C.; Keutsch, F.; Stone, E. A. Evidence and Quantitation of Aromatic Organosulfates in Ambient Aerosols in Lahore, Pakistan. Atmospheric Chemistry and Physics, 2013, 13, 4865-4875, doi:10.5194/acp-13-4865-2013
  • Staudt, S.; Kundu, S.; He, X.; Lehmler, H.; Lin, Y.; Cui, T.; Kristensen, K.; Glasius, M.; Zhang, X.; Weber, R.J.; Surratt, J.D., Stone, E. A. Aromatic organosulfates in atmospheric aerosols: synthesis, characterization, and abundance. Atmospheric Environment, 2014, 94, 366-373, doi: 10.1016/j.atmosenv.2014.05.049
  • Hettiyadura, A. P. S.; Stone, E. A.; Baker, Z.; Kundu, S.; Geddes, E.; Richards, K.; Humphry T.; Determination of atmospheric organosulfates using HILIC chromatography with MS detection. Atmospheric Measurement Techniques, 2015, 8, 2347-2358, doi:10.5194/amt-8-2347-2015.
  • Kundu, S.; Stone, E. A. Spatial variability in the chemical composition and sources of PM2.5 in Iowa. Environmental Science: Processes & Impacts, 2014, 16 (6), 1360-1370, doi:10.1039/C3EM00719G
  • Stone, E. A.; Snyder, D. C.; Sheesley, R. J.; Sullivan, A. P.; Weber, R. J.; Schauer, J. J., Source apportionment of fine organic aerosol in Mexico City during the MILAGRO experiment 2006. Atmospheric Chemistry and Physics 2008, 8, 1249-1259, doi:10.5194/acp-8-1249-2008
  • Stone, E. A.; Hedman, C. J.; Zhou, J.; Mieritz, M. M.; Schauer J. J., Schauer J. J. Insights to the nature of secondary organic aerosol in Mexico City during the MILAGRO Experiment 2006. Atmospheric Environment, 2010, 44, 312-319, doi:10.1016/j.atmosenv.2009.10.036
  • Stone, E. A.; Schauer J. J.; Quraishi, T.; Mahmood A., Chemical characterization and source apportionment of fine and coarse particulate matter in Lahore, Pakistan. Atmospheric Environment, 2010, 44, 1062-1070.
  • Stone, E. A.; Schauer J. J.; Pradhan B. B.; Dangol, P. M., Habib, G.; Venkataraman, C., Source apportionment of carbonaceous aerosol in the Kathmandu Valley: Sensitivity to biomass source profiles. Journal of Geophysical Research-Atmospheres, 2010, 115, (D22).
  • Stone, E. A.; Nguyen, T.T.; Pradhan B. B.; Dangol, P. M., Assessment of biogenic secondary organic aerosol in the Himalayas. Environmental Chemistry, 2012, 9, 263-272, doi.org/10.1071/EN12002
  • Stone, E. A.; Lough, G. C.; Schauer, J. J.; Praveen, P. S.; Corrigan, C. E.; Ramanathan, V., Understanding the origin of black carbon in the atmospheric brown cloud over the Indian Ocean. Journal of Geophysical Research-Atmospheres 2007, 112, (D22), doi: 10.1029/2006JD008118.