Articles | Volume 25, issue 19
https://doi.org/10.5194/acp-25-11597-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.Molecular insight into aqueous-phase photolysis and photooxidation of water-soluble organic matter emitted from biomass burning and coal combustion
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- Final revised paper (published on 30 Sep 2025)
- Supplement to the final revised paper
- Preprint (discussion started on 04 Mar 2025)
- Supplement to the preprint
Interactive discussion
Status: closed
Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor
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RC1: 'Comment on egusphere-2025-561', Anonymous Referee #1, 08 Apr 2025
- AC1: 'Reply on RC1', Jianzhong Song, 20 Jun 2025
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RC2: 'Comment on egusphere-2025-561', Anonymous Referee #2, 07 May 2025
- AC2: 'Reply on RC2', Jianzhong Song, 20 Jun 2025
Peer review completion
AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
AR by Jianzhong Song on behalf of the Authors (20 Jun 2025)
Author's response
EF by Katja Gänger (23 Jun 2025)
Manuscript
EF by Katja Gänger (23 Jun 2025)
Author's tracked changes
EF by Katja Gänger (23 Jun 2025)
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ED: Publish subject to technical corrections (11 Jul 2025) by Joachim Curtius

AR by Jianzhong Song on behalf of the Authors (14 Jul 2025)
Author's response
Manuscript
This paper investigated the changes in the optical properties, fluorophores, and molecular composition of WSOM derived from the combustion of biomass (RS) and coal (YL) during aqueous photolysis and hydroxyl radical (·OH) photooxidation. Results show distinct photochemical aging effects for RS and YL WSOM, characterized by photobleaching in RS WSOM and photoenhancement in YL WSOM. Additionally, ·OH photooxidation induces more substantial alterations than photolysis, degrading 61.6% of RS and 65.0% of YL WSOM molecules, compared to 14.9% and 23.1% during photolysis, respectively. The oxidation products were characterized by larger molecular weights and higher oxidation levels, including tannin-like substances and a type of black carbon-like compounds, whereas photolysis causes minor changes. These findings are helpful for us to understand the photochemical evolution of combustion-derived WSOM and its environmental and climate impacts. However, I have some questions should be addressed: