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ACP | Articles | Volume 20, issue 5
Atmos. Chem. Phys., 20, 2781–2794, 2020
https://doi.org/10.5194/acp-20-2781-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: In-depth study of air pollution sources and processes within...

Atmos. Chem. Phys., 20, 2781–2794, 2020
https://doi.org/10.5194/acp-20-2781-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 06 Mar 2020

Research article | 06 Mar 2020

Morphology and size of the particles emitted from a gasoline-direct-injection-engine vehicle and their ageing in an environmental chamber

Jiaoping Xing et al.

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Adachi, K. and Buseck, P. R.: Changes in shape and composition of sea-salt particles upon aging in an urban atmosphere, Atmos. Environ., 100, 1–9, https://doi.org/10.1016/j.atmosenv.2014.10.036, 2015. 
Alves, C. A., Lopes, D. J., Calvo, A. I., Evtyugina, M., Rocha, S., and Nunes, T.: Emissions from light-duty diesel and gasoline in-use vehicles measured on chassis dynamometer test cycles, Aerosol Air Qual. Res., 15, 99–116, https://doi.org/10.4209/aaqr.2014.01.0006, 2015. 
Baral, B., Raine, R., and Miskelly, G.: Effect of engine operating conditions on spark-ignition engine PAH emissions, SAE Technical Paper 2011-01-1161, https://doi.org/10.4271/2011-01-1161, 2011. 
Beardsley, R. L. and Jang, M.: Simulating the SOA formation of isoprene from partitioning and aerosol phase reactions in the presence of inorganics, Atmos. Chem. Phys., 16, 5993–6009, https://doi.org/10.5194/acp-16-5993-2016, 2016. 
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Our results highlight the contribution of gasoline-direct-injection (GDI) vehicles to aerosols, both primary and secondary. The major particles from GDI vehicles are organic and soot particles; they actively participate in chemical conversions in the atmosphere, leading to morphology and composition changes in hours. Rapid ageing could be attributable to the acid-catalysed mechanism and high concentrations of gaseous pollutants. These results would be beneficial for control of PM2.5 pollution.
Our results highlight the contribution of gasoline-direct-injection (GDI) vehicles to aerosols,...
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