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ACP | Articles | Volume 19, issue 5
Atmos. Chem. Phys., 19, 2861–2870, 2019
https://doi.org/10.5194/acp-19-2861-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Chem. Phys., 19, 2861–2870, 2019
https://doi.org/10.5194/acp-19-2861-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 05 Mar 2019

Research article | 05 Mar 2019

Unraveling the role of silicon in atmospheric aerosol secondary formation: a new conservative tracer for aerosol chemistry

Dawei Lu et al.

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Ahrens, L., Harner, T., and Shoeib, M.: Temporal variations of cyclic and linear volatile methylsiloxanes in the atmosphere using passive samplers and high-volume air samplers, Environ. Sci. Technol., 48, 9374–9381, https://doi.org/10.1021/es502081j, 2014. 
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Atkinson, R., Tuazon, E. C., Kwok, E. S. C., Arey, J., Aschmann, S. M., and Bridier, I.: Kinetics and products of the gas-phase reactions of (CH3)4Si, (CH3)3SiCH2OH, (CH3)3SiOSi(CH3)3 and (CD3)3SiOSi(CD3)3 with Cl atoms and OH radicals, J. Chem. Soc. Faraday Trans., 91, 3033–3039, https://doi.org/10.1039/Ft9959103033, 1995. 
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We investigated for the first time the role of Si during secondary formation process of PM2.5. We show the noncorrelation of Si with the secondary aerosol (SA) formation in Beijing, which reveals a new conservative tracer for aerosol chemistry. The SA contribution can be estimated by using Si as a single tracer instead of commonly used multiple chemical tracers. The correlation analysis of SA with the Si isotopic composition of PM2.5 can also reveal the sources of the precursors of SA.
We investigated for the first time the role of Si during secondary formation process of PM2.5....
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