Articles | Volume 19, issue 15
Atmos. Chem. Phys., 19, 9887–9902, 2019
https://doi.org/10.5194/acp-19-9887-2019

Special issue: Multiphase chemistry of secondary aerosol formation under...

Atmos. Chem. Phys., 19, 9887–9902, 2019
https://doi.org/10.5194/acp-19-9887-2019

Research article 07 Aug 2019

Research article | 07 Aug 2019

Photochemical aging of atmospherically reactive organic compounds involving brown carbon at the air–aqueous interface

Siyang Li et al.

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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Siyang Li on behalf of the Authors (03 Jun 2019)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (13 Jun 2019) by Daniel Knopf
RR by Anonymous Referee #2 (08 Jul 2019)
RR by Anonymous Referee #3 (09 Jul 2019)
ED: Publish subject to minor revisions (review by editor) (09 Jul 2019) by Daniel Knopf
AR by Siyang Li on behalf of the Authors (11 Jul 2019)  Author's response    Manuscript
ED: Publish as is (11 Jul 2019) by Daniel Knopf
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Short summary
We stimulated the photochemical aging of organic film coated on aqueous aerosol in the presence of imidazole-2-carboxaldehyde, humic acid, an atmospheric PM2.5 sample, and a secondary organic aerosol sample from the lab. The unsaturated lipid mixed with photosensitizer under UV irradiation produced hydroperoxides, leading to surface area increase in organic film. Our results reveal the modification of organic film on aqueous aerosol has potential influence on the hygroscopic growth of droplets.
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