Gasoline aromatics: a critical determinant of urban secondary organic aerosol formation

Gasoline aromatics: a critical determinant of urban secondary organic aerosol formation
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汽油芳烃:城市二次有机气溶胶形成的关键决定因素

DOI:
10.5194/acp-17-10743-2017
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发表时间:
2017-09
影响因子:
6.3
通讯作者:
Min Hu
Min Hu
中科院分区:
地球科学1区
文献类型:
--
作者:
Jianfei Peng;Min Hu

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摘要。汽油车尾气是城市大气中二次有机气溶胶(SOA)形成的重要来源。燃料成分对汽油SOA生产具有潜在的相当大的影响,但燃料成分与SOA生产之间的联系仍然知之甚少。在这里,我们提出了通过室内氧化法研究汽油芳香族含量对SOA生产的影响的室内实验。当汽油芳香族含量从29%上升到37% %时,观察到汽油废气中SOA产品的显着放大因子为3-6。使用高芳香族燃料时,芳香族挥发性有机化合物(VOCs)的大量排放对提高SOA产量起着至关重要的作用,而半挥发性有机化合物(如气相多环芳烃)也可能有助于提高SOA产量。我们的研究结果表明,汽油芳烃显著影响环境PM2。并强调对汽油芳烃含量进行更严格的监管将对城市空气质量带来可观的好处。
Abstract. Gasoline vehicle exhaust is an important contributor to secondary organic aerosol (SOA) formation in urban atmosphere. Fuel composition has a potentially considerable impact on gasoline SOA production, but the link between fuel components and SOA production is still poorly understood. Here, we present chamber experiments to investigate the impacts of gasoline aromatic content on SOA production through chamber oxidation approach. A significant amplification factor of 3–6 for SOA productions from gasoline exhausts is observed as gasoline aromatic content rose from 29 to 37 %. Considerably higher emission of aromatic volatile organic compounds (VOCs) using high-aromatic fuel plays an essential role in the enhancement of SOA production, while semi-volatile organic compounds (e.g., gas-phase PAHs) may also contribute to the higher SOA production. Our findings indicate that gasoline aromatics significantly influence ambient PM2. 5 concentration in urban areas and emphasize that more stringent regulation of gasoline aromatic content will lead to considerable benefits for urban air quality.
DOI: 10.5194/acp-15-9049-2015
发表时间: 2015-08
影响因子: 6.3
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发表时间: 1999-11
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发表时间: 2014-10-09
期刊: NATURE
影响因子: 64.8
作者:
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通讯作者: Prevot, Andre S. H.
DOI: 10.1038/ncomms4749
发表时间: 2014-05-01
影响因子: 16.6
作者:
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通讯作者: Prevot, A. S. H.