Articles | Volume 19, issue 3
https://doi.org/10.5194/acp-19-1649-2019
https://doi.org/10.5194/acp-19-1649-2019
Research article
 | 
08 Feb 2019
Research article |  | 08 Feb 2019

Physical properties of secondary photochemical aerosol from OH oxidation of a cyclic siloxane

Nathan J. Janechek, Rachel F. Marek, Nathan Bryngelson, Ashish Singh, Robert L. Bullard, William H. Brune, and Charles O. Stanier

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Cited articles

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. 
Atkinson, R.: Kinetics of the Gas-Phase Reactions of a Series of Organosilicon Compounds with OH and NO3 Radicals and O3 at 297+/-2 K, Environ. Sci. Technol., 25, 863–866, https://doi.org/10.1021/es00017a005, 1991. 
Brooke, D., Crookes, M., Gray, D., and Robertson, S.: Environmental Risk Assessment Report: Decamethylcyclopentasiloxane, Environment Agency of England and Wales, Bristol, UK, ISBN 978-1-84911-029-7, 223 pp., 2009a. 
Brooke, D., Crookes, M., Gray, D., and Robertson, S.: Environmental Risk Assessment Report: Dodecamethylcyclohexasiloxane, Environment Agency of England and Wales, Bristol, UK, ISBN 978-1-84911-030-3, 108 pp. 2009b. 
Brooke, D., Crookes, M., Gray, D., and Robertson, S.: Environmental Risk Assessment Report: Octamethylcyclotetrasiloxane, Environment Agency of England and Wales, Bristol, UK, ISBN 978-1-84911-031-0, 201 pp., 2009c. 
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Short summary
Cyclic volatile methyl siloxanes (cVMSs) are widely used chemicals in personal care products which can undergo oxidation to generate secondary organic aerosol. In this work, cVMS oxidation aerosols were generated using a photochemical chamber and the physical properties characterized. The aerosol yield, volatility, hygroscopicity, morphology, elemental composition, and proposed parameters for treatment as secondary organic aerosol in atmospheric models are provided.
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