Articles | Volume 22, issue 16
https://doi.org/10.5194/acp-22-10827-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-22-10827-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
26 Aug 2022
Research article |
| 26 Aug 2022
| 26 Aug 2022
Secondary organic aerosols from OH oxidation of cyclic volatile methyl siloxanes as an important Si source in the atmosphere
Chong Han
School of Metallurgy, Northeastern University, Shenyang, 110819, China
Hongxing Yang
School of Metallurgy, Northeastern University, Shenyang, 110819, China
Air Quality Research Division, Environment and Climate Change Canada,
Toronto, Ontario M3H 5T4, Canada
Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen
5232, Switzerland
Patrick Lee
Air Quality Research Division, Environment and Climate Change Canada,
Toronto, Ontario M3H 5T4, Canada
John Liggio
Air Quality Research Division, Environment and Climate Change Canada,
Toronto, Ontario M3H 5T4, Canada
Amy Leithead
Air Quality Research Division, Environment and Climate Change Canada,
Toronto, Ontario M3H 5T4, Canada
State Key Joint Laboratory of Environmental Simulation and Pollution
Control, College of Environmental Sciences and Engineering, Peking
University, Beijing, 100871, China
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Short summary
We presented yields and compositions of Si-containing SOAs generated from the reaction of cVMSs (D3–D6) with OH radicals. NOx played a negative role in cVMS SOA formation, while ammonium sulfate seeds enhanced D3–D5 SOA yields at short photochemical ages under high-NOx conditions. The aerosol mass spectra confirmed that the components of cVMS SOAs significantly relied on OH exposure. A global cVMS-derived SOA source strength was estimated in order to understand SOA formation potentials of cVMSs.
We presented yields and compositions of Si-containing SOAs generated from the reaction of cVMSs...
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