Articles | Volume 19, issue 9
https://doi.org/10.5194/acp-19-6579-2019
© Author(s) 2019. 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-19-6579-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| Highlight paper
| 
17 May 2019
Research article | Highlight paper |
| 17 May 2019
| 17 May 2019
Photooxidants from brown carbon and other chromophores in illuminated particle extracts
Richie Kaur
Department of Land, Air and Water Resources, University of
California, Davis, One Shields Avenue, Davis, CA 95616-8627, USA
Jacqueline R. Labins
Department of Land, Air and Water Resources, University of
California, Davis, One Shields Avenue, Davis, CA 95616-8627, USA
Scarlett S. Helbock
Department of Land, Air and Water Resources, University of
California, Davis, One Shields Avenue, Davis, CA 95616-8627, USA
Wenqing Jiang
Department of Environmental Toxicology, University of
California, Davis, One Shields Avenue, Davis, CA 95616-8627, USA
Keith J. Bein
Center for Health and the Environment, University of California, Davis,
One Shields Avenue, Davis, CA 95616-8627, USA
Department of Environmental Toxicology, University of
California, Davis, One Shields Avenue, Davis, CA 95616-8627, USA
Department of Land, Air and Water Resources, University of
California, Davis, One Shields Avenue, Davis, CA 95616-8627, USA
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Latest update: 06 Jun 2025
Short summary
We measured hydroxyl radical (•OH), singlet oxygen (1O2*), and organic triplets (3C*) in illuminated aqueous particle extracts. After measuring the impact of dilution on oxidant concentrations, we extrapolated our results to predict them in ambient particles – 1O2* and 3C* concentrations appear to be greatly enhanced, while •OH appears largely unchanged. Two of these oxidants (1O2*, 3C*) are not yet included in atmospheric models, and our results make it possible to include them in the future.
We measured hydroxyl radical (•OH), singlet oxygen (1O2*), and organic triplets (3C*) in...
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