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Formation of Secondary Organic Aerosol from Irradiated a-Pinene/Tolueme/NOx Mixtures and the Effect of Isoprene and Sulfur Dioxide
Citation:
JAOUI, M., E. O. EDNEY, T. E. KLEINDIENST, M. LEWANDOWSKI, J. H. OFFENBERG, J. D. SURRATT, AND J. SEINFELD. Formation of Secondary Organic Aerosol from Irradiated a-Pinene/Tolueme/NOx Mixtures and the Effect of Isoprene and Sulfur Dioxide. JOURNAL OF GEOPHYSICAL RESEARCH. American Geophysical Union, Washington, DC, 113(D09303):1-12, (2008).
Impact/Purpose:
The National Exposure Research Laboratory′s (NERL) Human Exposure and Atmospheric Sciences Division (HEASD) conducts research in support of EPA′s mission to protect human health and the environment. HEASD′s research program supports Goal 1 (Clean Air) and Goal 4 (Healthy People) of EPA′s strategic plan. More specifically, our division conducts research to characterize the movement of pollutants from the source to contact with humans. Our multidisciplinary research program produces Methods, Measurements, and Models to identify relationships between and characterize processes that link source emissions, environmental concentrations, human exposures, and target-tissue dose. The impact of these tools are improved regulatory programs and policies for EPA.
Description:
Secondary organic aerosol (SOA) was generated by irradiating a series of a-pinene/toluene/NOx mixtures in the absence and presence of isoprene or sulfur dioxide. The purpose of the experiment was to evaluate the extent to which chemical perturbations to this base-case (a-pinene/toluene) mixture led to changes in the gas-phase chemistry which strongly influences mass and composition of SOA and secondary organic carbon (SOC) formed.