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A wide range of adverse health outcomes are associated with diesel exhaust. We collected measurements inside commuter trains and inter-city diesel trains to determine the concentration of ultrafine particles (UFP), lung deposited surface area (LDSA), and black carbon (BC) in air. Walking measurements were taken on the sidewalks of busy streets in downtown Toronto.
Under certain conditions, diesel-powered passenger trains had elevated concentrations of UFP, BC, and LDSA. When the passenger coaches were pulled by a locomotive, UFP, LDSA, and BC were 18, 10, and 6 times higher, respectively, than the exposure levels when the locomotive pushed the coaches. Exposure to these pollutants was most elevated in the coach located closest to the locomotive. The pollutant concentrations in pull-trains were substantially higher than those measured while walking on city sidewalks and other commuter options reported in the literature. Additional measurements of gaseous pollutants, particulate matter, and trace metals were conducted.
Presenter: Dr. Cheol-Heon Jeong
Cheol Jeong is a senior research associate in Southern Ontario Centre for Atmospheric Aerosol Research (SOCAAR) at the University of Toronto. He completed his Ph.D. in Civil and Environmental Engineering from Clarkson University, New York, USA. His research interests primarily involve physicochemical characterization of airborne particles, source identification of air pollution using a combination of advanced instruments and modeling, spatial variations of traffic-related air pollution near roadways, and personal exposure to traffic emissions in urban microenvironments.
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