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Polycyclic aromatic hydrocarbons and combustion aerosol photoemission
Institution:1. Department of Cellular & Molecular Physiology, Penn State College of Medicine, Hershey, PA 17033, United States;2. Department of Dermatology, Penn State College of Medicine, Hershey, PA 17033, United States;1. Institute of Urban Meteorology, China Meteorological Administration, Beijing 100089, China;2. Environmental Meteorology Forecast Center of Beijing–Tianjin–Hebei, China Meteorological Administration, Beijing 100089, China;3. China Meteorological Administration, Beijing 100081, China;4. Beijing Municipal Meteorological Observatory, Beijing 100081, China;1. Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China;2. Key Laboratory of Regional Numerical Weather Prediction, Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou, Guangdong 510080, China;3. Jiangsu Environmental Monitoring Center, Nanjing 210036, China;4. Department of Environmental Science and Technology, Sun Yat-sen University, Guangzhou 510275, China;5. Hong Kong Observatory, Hong Kong, China;1. German Federal Institute for Risk Assessment (BfR), Department of Chemical and Product Safety, Berlin, Germany;2. Helmholtz Centre for Environmental Research (UFZ), Department of Molecular Systems Biology, Leipzig, Germany;3. INSERM UMR 996, Univ Paris-Sud, Université Paris-Saclay, Chátenay-Malabry, France;4. University of Leipzig, Institute of Biochemistry, Leipzig, Germany;5. Aalborg University, Department of Chemistry and Bioscience, Aalborg, Denmark
Abstract:An experimental investigation was conducted to explain the physical chemistry of aerosol photoemission (APE) from combustion sources. Strong correlations between APE and total polycyclic aromatic hydrocarbons (TPAH) in particulate matter were observed for aerosols from both oil stove and automobile exhaust. Sampling and analytical procedures were developed to allow detection of PAHs ranging in molecular weight (MW) from phenanthrene (MW 178) to coronene (MW 300) in oil stove exhaust after short sampling periods. Small variations of the oil stove PAH profile with Bacharach number were observed. Interactions between adsorbed polycyclic aromatic hydrocarbons PAHs and particle surface are proposed as the most likely cause of environmental APE after irradiation at 4.9 eV.
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