Effects of liquid–liquid phase separation and relative humidity on the heterogeneous OH oxidation of inorganic–organic aerosols: insights from methylglutaric acid and ammonium sulfate particles

Lam, Hoi Ki; Xu, Rongshuang; Choczynski, Jack; Davies, James F.; Ham, Dongwan; Song, Mijung; Zuend, Andreas; Li, Wentao; Tse, Ying-Lung Steve; Chan, Man Nin

doi:https://doi.org/10.5194/acp-21-2053-2021

Articles | Volume 21, issue 3

https://doi.org/10.5194/acp-21-2053-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-21-2053-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 3

Research article

|

11 Feb 2021

Research article |

| 11 Feb 2021

Effects of liquid–liquid phase separation and relative humidity on the heterogeneous OH oxidation of inorganic–organic aerosols: insights from methylglutaric acid and ammonium sulfate particles

Hoi Ki Lam, Rongshuang Xu, Jack Choczynski, James F. Davies, Dongwan Ham, Mijung Song, Andreas Zuend, Wentao Li, Ying-Lung Steve Tse, and Man Nin Chan

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Final revised paper (published on 11 Feb 2021)
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Preprint (discussion started on 23 Sep 2020)
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Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'Reviewer comment', Anonymous Referee #1, 10 Oct 2020
- AC1: 'Responses to reviewer 1's comments', ManNin Chan, 20 Dec 2020
RC2: 'Review of “Effects of Liquid-Liquid Phase Separation and Relative Humidity on the Heterogeneous OH Oxidation of Inorganic-Organic Aerosols: Insights from Methylglutaric Acid/Ammonium Sulfate Particles” by Hoi Ki Lam et al.', Anonymous Referee #2, 26 Oct 2020
- AC2: 'Responses to reviewer 2's comments', ManNin Chan, 20 Dec 2020

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by ManNin Chan on behalf of the Authors (20 Dec 2020) Author's response Manuscript

ED: Publish as is (07 Jan 2021) by Markus Ammann

AR by ManNin Chan on behalf of the Authors (08 Jan 2021)

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Short summary

This work demonstrates that organic compounds present at or near the surface of aerosols can be subjected to oxidation initiated by gas-phase oxidants, such as hydroxyl radicals (OH). The heterogeneous reactivity is sensitive to their surface concentrations, which are determined by the phase separation behavior. This results of this work emphasize the effects of phase separation and potentially distinct aerosol morphologies on the chemical transformation of atmospheric aerosols.