Articles | Volume 25, issue 18
https://doi.org/10.5194/acp-25-10965-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-10965-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
23 Sep 2025
Research article |
| 23 Sep 2025
| 23 Sep 2025
New water-soluble, toxic tracers of wood burning identified in fine brown carbon aerosol using a non-target approach
Vinh Nguyen
Faculty of Chemistry, University of Warsaw, al. Żwirki i Wigury 101, 02-089 Warsaw, Poland
Bartłomiej Witkowski
CORRESPONDING AUTHOR
Faculty of Chemistry, University of Warsaw, al. Żwirki i Wigury 101, 02-089 Warsaw, Poland
Tomasz Gierczak
Faculty of Chemistry, University of Warsaw, al. Żwirki i Wigury 101, 02-089 Warsaw, Poland
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EGUsphere, https://doi.org/10.5194/egusphere-2026-1788, https://doi.org/10.5194/egusphere-2026-1788, 2026
This preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).
Short summary
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This article investigates how natural organic compounds are converted into fine and submicron aerosols in cloud and fog water. The reactions of essential oil components (e.g., menthol) were studied, including chemical analyses and modeling. The data obtained indicated that oxidation reactions of terpenoic alcohols in some hydrometeors can form new particles, influencing air quality and climate. The presented highlights a potentially important pathway of organic aerosol formation.
Bartłomiej Witkowski, Priyanka Jain, Beata Wileńska, and Tomasz Gierczak
Atmos. Chem. Phys., 24, 663–688, https://doi.org/10.5194/acp-24-663-2024, https://doi.org/10.5194/acp-24-663-2024, 2024
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This article reports the results of the kinetic measurements for the aqueous oxidation of the 29 aliphatic alcohols by hydroxyl radical (OH) at different temperatures. The data acquired and the literature data were used to optimize a model for predicting the aqueous OH reactivity of alcohols and carboxylic acids and to estimate the atmospheric lifetimes of five terpenoic alcohols. The kinetic data provided new insights into the mechanism of aqueous oxidation of aliphatic molecules by the OH.
Bartłomiej Witkowski, Priyanka Jain, and Tomasz Gierczak
Atmos. Chem. Phys., 22, 5651–5663, https://doi.org/10.5194/acp-22-5651-2022, https://doi.org/10.5194/acp-22-5651-2022, 2022
Short summary
Short summary
This article describes a comprehensive investigation of the aqueous oxidation of 4-nitrophenol (4NP) by hydroxyl radicals (OH). The reaction was carried out in a laboratory photoreactor. We report the formation of key intermediates under different pH conditions and the evolution of the light absorption of the reaction solution. The results provide new insights into the formation and removal (chemical bleaching) of light-absorbing organic aerosols (atmospheric brown carbon).
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Short summary
This article provides new insights into the molecular composition of fine, light-absorbing organic aerosols emitted by biomass burning. Laboratory-generated aerosol was extracted into water and analyzed with liquid chromatography-mass spectrometry, identifying over 350 new water-soluble wood-burning tracers. This study also examines the toxicities and atmospheric lifetimes, revealing that the newly identified molecules are harmful and can undergo chemical processing in atmospheric hydrometeors.
This article provides new insights into the molecular composition of fine, light-absorbing...
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