Articles | Volume 21, issue 6
Atmos. Chem. Phys., 21, 4915–4937, 2021
https://doi.org/10.5194/acp-21-4915-2021
Atmos. Chem. Phys., 21, 4915–4937, 2021
https://doi.org/10.5194/acp-21-4915-2021

Research article 30 Mar 2021

Research article | 30 Mar 2021

On the importance of atmospheric loss of organic nitrates by aqueous-phase OH oxidation

Juan Miguel González-Sánchez et al.

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Cited articles

Adams, G. E., Boag, J. W., and Michael, B. D.: Reactions of the hydroxyl radical: Part 2. – Determination of absolute rate constants, Trans. Faraday Soc., 61, 1417–1424, https://doi.org/10.1039/TF9656101417, 1965. 
Alam, M. S., Rao, B. S. M., and Janata, E.: ⚫OH reactions with aliphatic alcohols: Evaluation of kinetics by direct optical absorption measurement. A pulse radiolysis study, Radiat. Phys. Chem., 67, 723–728, https://doi.org/10.1016/S0969-806X(03)00310-4, 2003. 
Anbar, M., Meyerstein, D., and Neta, P.: Reactivity of aliphatic compounds towards hydroxyl radicals, J. Chem. Soc. B Phys. Org., 17, 742–747, https://doi.org/10.1039/J29660000742, 1966. 
Aoki, N., Inomata, S., and Tanimoto, H.: Detection of C1-C5 alkyl nitrates by proton transfer reaction time-of-flight mass spectrometry, Int. J. Mass Spectrom., 263, 12–21, https://doi.org/10.1016/j.ijms.2006.11.018, 2007. 
Arakaki, T., Anastasio, C., Kuroki, Y., Nakajima, H., Okada, K., Kotani, Y., Handa, D., Azechi, S., Kimura, T., Tsuhako, A., and Miyagi, Y.: A General Scavenging Rate Constant for Reaction of Hydroxyl Radical with Organic Carbon in Atmospheric Waters, Environ. Sci. Technol., 47, 8196–8203, https://doi.org/10.1021/es401927b, 2013. 
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Organic nitrates play a crucial role in air pollution as they are considered NOx reservoirs. This work lights up the importance of their reactions with OH radicals in the aqueous phase (cloud/fog, wet aerosol), which is slower than in the gas phase. For compounds that significantly partition in water such as polyfunctional biogenic nitrates, these aqueous-phase reactions should drive their atmospheric removal, leading to a broader spatial distribution of NOx than previously accounted for.
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