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CHARACTERIZATION OF THE FINE PARTICLE AND GASEOUS EMISSIONS DURING SCHOOL BUS IDLING
Citation:
KINSEY, J. S., D. C. WILLIAMS, Y. DONG, AND R. LOGAN. CHARACTERIZATION OF THE FINE PARTICLE AND GASEOUS EMISSIONS DURING SCHOOL BUS IDLING. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, 41(14):4972-4979, (2007).
Description:
The particulate matter (PM) and gaseous emissions from six diesel school buses were determined over a simulated idling period typical of schools in the northeastern U.S. Testing was conducted for both continuous idle and hot restart conditions using particle and gas analyzers. The specific pollutants measured included total PM-2., PM number concentration, particle size distribution, particle surface, polycyclic aromatic hydrocarbons (PAHs), a tracer gas, carbon monoxide, carbon dioxide, nitrogen oxides, total hydrocarbons, oxygen, and formaldehyde. The emissions of particle-bound PAHs were substantially lower for restart as compared with idle. A predictive equation was also developed that indicates that restart is the preferred operating scenario as long as there is no extended idling after restart.