Elucidating secondary organic aerosol from diesel and gasoline vehicles through detailed characterization of organic carbon emissions
Emissions from gasoline and diesel vehicles are predominant anthropogenic sources of reactive gas-phase organic carbon and key precursors to secondary organic aerosol (SOA) in urban areas. Their relative importance for aerosol formation is a controversial issue with implications for air quality cont...
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| Veröffentlicht in: | Proceedings of the National Academy of Sciences - PNAS 2012-11, Vol.109 (45), p.18318-18323 |
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| container_title | Proceedings of the National Academy of Sciences - PNAS |
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| creator | Gentner, Drew R Isaacman, Gabriel Worton, David R Chan, Arthur W. H Dallmann, Timothy R Davis, Laura Liu, Shang Day, Douglas A Russell, Lynn M Wilson, Kevin R Weber, Robin Guha, Abhinav Harley, Robert A Goldstein, Allen H |
| description | Emissions from gasoline and diesel vehicles are predominant anthropogenic sources of reactive gas-phase organic carbon and key precursors to secondary organic aerosol (SOA) in urban areas. Their relative importance for aerosol formation is a controversial issue with implications for air quality control policy and public health. We characterize the chemical composition, mass distribution, and organic aerosol formation potential of emissions from gasoline and diesel vehicles, and find diesel exhaust is seven times more efficient at forming aerosol than gasoline exhaust. However, both sources are important for air quality; depending on a region’s fuel use, diesel is responsible for 65% to 90% of vehicular-derived SOA, with substantial contributions from aromatic and aliphatic hydrocarbons. Including these insights on source characterization and SOA formation will improve regional pollution control policies, fuel regulations, and methodologies for future measurement, laboratory, and modeling studies. |
| doi_str_mv | 10.1073/pnas.1212272109 |
| format | Article |
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We characterize the chemical composition, mass distribution, and organic aerosol formation potential of emissions from gasoline and diesel vehicles, and find diesel exhaust is seven times more efficient at forming aerosol than gasoline exhaust. However, both sources are important for air quality; depending on a region’s fuel use, diesel is responsible for 65% to 90% of vehicular-derived SOA, with substantial contributions from aromatic and aliphatic hydrocarbons. 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| ispartof | Proceedings of the National Academy of Sciences - PNAS, 2012-11, Vol.109 (45), p.18318-18323 |
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| subjects | Aerosols Aerosols - analysis air quality anthropogenic activities carbon Carbon - analysis Carbon dioxide emissions Carbon Monoxide - analysis chemical composition Diesel exhaust Diesel fuels Diesel vehicles Emissions environmental policy Gas Chromatography-Mass Spectrometry gases Gasoline Gasoline - analysis Hydrocarbons Molecular Weight Organic Chemicals - analysis Outdoor air quality Particulate emissions Physical Sciences Pollutant emissions Pollution control Public health quality control Urban areas Vehicle Emissions - analysis Volatile organic compounds Volatile Organic Compounds - analysis |
| title | Elucidating secondary organic aerosol from diesel and gasoline vehicles through detailed characterization of organic carbon emissions |
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