Gomez Martin, JC, Lewis, TR, Douglas, KM orcid.org/0000-0002-3281-3685 et al. (3 more authors) (2022) The reaction between HgBr and O3: kinetic study and atmospheric implications. Physical Chemistry Chemical Physics, 24 (20). pp. 12419-12432. ISSN 1463-9076
Abstract
The rate constants of many reactions currently considered to be important in the atmospheric chemistry of mercury remain to be measured in the laboratory. Here we report the first experimental determination of the rate constant of the gas-phase reaction between the HgBr radical and ozone, for which a value at room temperature of k(HgBr + O3) = (7.5 ± 0.6) × 10-11 cm3 molecule s-1 (1σ) has been obtained. The rate constants of two reduction side reactions were concurrently determined: k(HgBr + O )=(5.3 ± 0.4) × 10-11 cm3 molecule s-1 and k(HgBrO + O)=(9.1 ± 0.6) × 10-11 cm3 molecule s-1. The value of k(HgBr + O3) is slightly lower than the collision number, but lower, confirming the absence of a significant energy barrier. Considering the abundance of ozone in the troposphere, our experimental rate constant supports recent modelling results suggesting that the main atmospheric fate of HgBr is reaction with ozone to form BrHgO.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This journal is © the Owner Societies 2022. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes. |
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: | 12 May 2022 13:24 |
Last Modified: | 06 Jul 2022 09:23 |
Status: | Published |
Publisher: | RSC |
Identification Number: | 10.1039/D2CP00754A |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:186679 |