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Elucidating secondary organic aerosol from diesel and gasoline vehicles through detailed characterization of organic carbon emissions

zhangxia111 添加于 2012/10/25 15:27:16  1184次阅读 | 0次推荐 | 0个评论

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.

作 者:Drew R. Gentnera, Gabriel Isaacmanb, David R. Wortonb,c, Arthur W. H. Chanb, Timothy R. Dallmanna, Laura Davisa, Shang Liud, Douglas A. Dayd,1, Lynn M. Russelld, Kevin R. Wilsone, Robin Weberb, Abhinav Guhab, Robert A. Harleya, and Allen H. Goldstein
期刊名称: Proceedings of the National Academy of Sciences
期卷页: 第卷 第期 ~页
学科领域:化学科学 » 有机化学 » 有机分析
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原文链接:http://www.pnas.org/content/early/2012/10/17/1212272109.abstract?sid=47246d67-27a6-49d7-83ac-e4f60cd73bc6
DOI: 10.1073/pnas.1212272109
ISBN: 0027-8424
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