Articles | Volume 22, issue 2
Atmos. Chem. Phys., 22, 917–928, 2022
https://doi.org/10.5194/acp-22-917-2022
Atmos. Chem. Phys., 22, 917–928, 2022
https://doi.org/10.5194/acp-22-917-2022
Research article
19 Jan 2022
Research article | 19 Jan 2022

Secondary organic aerosol formation from the oxidation of decamethylcyclopentasiloxane at atmospherically relevant OH concentrations

Sophia M. Charan et al.

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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. a
Alton, M. W. and Browne, E. C.: Atmospheric Chemistry of Volatile Methyl Siloxanes: Kinetics and Products of Oxidation by OH Radicals and Cl Atoms, Environ. Sci. Technol., 54, 5992–5999, https://doi.org/10.1021/acs.est.0c01368, 2020. a, b, c, d, e, f, g
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. a, b
Balducci, C., Perilli, M., Romagnoli, P., and Cecinato, A.: New Developments on Emerging Organic Pollutants in the Atmosphere, Environ. Sci. Pollut. R., 19, 1875–1884, https://doi.org/10.1007/s11356-012-0815-2, 2012. a
Bruns, E. A., El Haddad, I., Keller, A., Klein, F., Kumar, N. K., Pieber, S. M., Corbin, J. C., Slowik, J. G., Brune, W. H., Baltensperger, U., and Prévôt, A. S. H.: Inter-comparison of laboratory smog chamber and flow reactor systems on organic aerosol yield and composition, Atmos. Meas. Tech., 8, 2315–2332, https://doi.org/10.5194/amt-8-2315-2015, 2015. a
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Short summary
In this study, we investigate the secondary organic aerosol formation potential of decamethylcyclopentasiloxane (D5), which is used as a tracer for volatile chemical products and measured in high concentrations both outdoors and indoors. By performing experiments in different types of reactors, we find that D5’s aerosol formation is highly dependent on OH, and, at low OH concentrations or exposures, D5 forms little aerosol. We also reconcile results from other studies.
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