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Matthews, PSJ, Baeza-Romero, MT, Whalley, LK et al. (1 more author) (2014) Uptake of HO2 radicals onto Arizona Test Dust aerosols. Atmospheric Chemistry and Physics Discussions. ISSN 1680-7367
Abstract
Uptake coefficients for HO2 radicals onto Arizona Test Dust (ATD) aerosols were measured at room temperature and atmospheric pressure using an aerosol flow tube and the sensitive Fluorescence Assay by Gas Expansion (FAGE) technique, enabling HO2 concentrations in the range 3 - 10108 molecule cm-3 to be investigated. The uptake coefficients were measured as 0.031 ± 0.008 and 0.018 ± 0.006 and for the lower and higher HO2 concentrations, respectively, over a range of relative humidities (5 – 76 %). A time dependence for the HO2 uptake onto the ATD aerosols was observed, with larger uptake coefficients observed at shorter reaction times. The combination of time and HO2 concentration dependencies suggest either the partial saturation of the dust surface or that a chemical component of the dust is partially consumed whilst the aerosols are exposed to HO2. A constrained box model is used to show that HO2 uptake to dust surfaces may be an important loss pathway of HO2 in the atmosphere.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © Author(s) 2014. CC Attribution 3.0 License. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Physical Chemistry (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 04 Jun 2021 11:40 |
Last Modified: | 25 Jun 2023 22:35 |
Status: | Published |
Publisher: | Copernicus Publications |
Identification Number: | 10.5194/acpd-14-4229-2014 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:171246 |
Available Versions of this Item
- Uptake of HO2 radicals onto Arizona Test Dust aerosols. (deposited 04 Jun 2021 11:40) [Currently Displayed]