Articles | Volume 23, issue 15
https://doi.org/10.5194/acp-23-8805-2023
© Author(s) 2023. 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-23-8805-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
09 Aug 2023
Research article |
| 09 Aug 2023
| 09 Aug 2023
Predicting photooxidant concentrations in aerosol liquid water based on laboratory extracts of ambient particles
Lan Ma
Department of Land, Air and Water Resources, University of California,
Davis, One Shields Avenue, Davis,
CA 95616-8627, USA
now at: SGS-CSTC Standards Technical Services Co., Ltd. Hangzhou
Branch, Hangzhou, Zhejiang Province, 310052, China
Reed Worland
Department of Land, Air and Water Resources, University of California,
Davis, One Shields Avenue, Davis,
CA 95616-8627, USA
now at: Department of Chemistry, University of Washington, 1410
Northeast Campus Parkway, Seattle, WA 98195, USA
Wenqing Jiang
Department of Environmental Toxicology, University of California,
Davis, One Shields Avenue, Davis,
CA 95616-8627, USA
Christopher Niedek
Department of Environmental Toxicology, University of California,
Davis, One Shields Avenue, Davis,
CA 95616-8627, USA
Chrystal Guzman
Department of Land, Air and Water Resources, University of California,
Davis, One Shields Avenue, Davis,
CA 95616-8627, USA
now at: Department of Pharmacology, University of Washington, 1410
Northeast Campus Parkway, Seattle, WA 98195, 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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Short summary
Although photooxidants are important in airborne particles, little is known of their concentrations. By measuring oxidants in a series of particle dilutions, we predict their concentrations in aerosol liquid water (ALW). We find •OH concentrations in ALW are on the order of 10−15 M, similar to their cloud/fog values, while oxidizing triplet excited states and singlet molecular oxygen have ALW values of ca. 10−13 M and 10−12 M, respectively, roughly 10–100 times higher than in cloud/fog drops.
Although photooxidants are important in airborne particles, little is known of their...
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