Secondary organic aerosols from OH oxidation of cyclic volatile methyl siloxanes as an important Si source in the atmosphere
Abstract x conditions in an oxidation flow reactor. The aerosol yields increased progressively from D3 to D6, consistent with the volatilities and molecule weights of these cVMSs. NOx can restrict the formation of secondary organic aerosols (SOAs), leading to lower SOA yields under high-NOx conditions than under low-NOx conditions, with a yield decrease between 0.05–0.30 depending on the cVMSs. Ammonium sulfate seeds exhibited minor impacts on SOA yields under low-NOx conditions but significantly increased the SOA yields in the oxidation of D3–D5 at short photochemical ages under high-NOx conditions. The mass spectra of the SOAs showed a dependence of its chemical compositions on OH exposure. At high exposures equivalent to photochemical ages of > 4 d in the atmosphere, D4–D6 SOAs mainly consisted of Cx Hy and Cx Hy Oz Sin under low-NOx conditions, whereas they primarily contained Nm Oz, Cx Hy, Cx Hy O1, Cx Hy O> 1 x Hy Oz Sin under high-NOx conditions. The potential contributions of cVMSs to SOA formation in the atmosphere were evaluated using the reported cVMSs annual production and the yield obtained in the present study. A global cVMS-derived (D4–D6) SOA source strength is estimated to be 0.01 Tg yr- 1, distributed over major urban centers.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Secondary organic aerosols from OH oxidation of cyclic volatile methyl siloxanes as an important Si source in the atmosphere ; volume:22 ; number:16 ; year:2022 ; pages:10827-10839 ; extent:13
Atmospheric chemistry and physics ; 22, Heft 16 (2022), 10827-10839 (gesamt 13)
- Creator
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Han, Chong
Yang, Hongxing
Li, Kun
Lee, Patrick
Liggio, John
Leithead, Amy
Li, Shao-Meng
- DOI
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10.5194/acp-22-10827-2022
- URN
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urn:nbn:de:101:1-2022090105245582445990
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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15.08.2025, 7:26 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Han, Chong
- Yang, Hongxing
- Li, Kun
- Lee, Patrick
- Liggio, John
- Leithead, Amy
- Li, Shao-Meng
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