Autor: |
Tran LN; Department of Environmental Toxicology, University of California Davis, Davis, California 95616, United States., Abellar KA; Department of Chemistry, University of California Davis, Davis, California 95616, United States., Cope JD; Department of Environmental Toxicology, University of California Davis, Davis, California 95616, United States., Nguyen TB; Department of Environmental Toxicology, University of California Davis, Davis, California 95616, United States. |
Jazyk: |
angličtina |
Zdroj: |
The journal of physical chemistry. A [J Phys Chem A] 2022 Sep 22; Vol. 126 (37), pp. 6517-6525. Date of Electronic Publication: 2022 Sep 07. |
DOI: |
10.1021/acs.jpca.2c04964 |
Abstrakt: |
The sulfate anion radical (SO 4 •- ) is a reactive oxidant formed in the autoxidation chain of sulfur dioxide, among other sources. Recently, new formation pathways toward SO 4 •- and other reactive sulfur species have been reported. This work investigated the second-order rate coefficients for the aqueous SO 4 •- oxidation of the following important organic aerosol compounds ( k SO4 ): 2-methyltetrol, 2-methyl-1,2,3-trihydroxy-4-sulfate, 2-methyl-1,2-dihydroxy-3-sulfate, 1,2-dihydroxyisoprene, 2-methyl-2,3-dihydroxy-1,4-dinitrate, 2-methyl-1,2,4-trihydroxy-3-nitrate, 2-methylglyceric acid, 2-methylglycerate, lactic acid, lactate, pyruvic acid, pyruvate. The rate coefficients of the unknowns were determined against that of a reference in pure water in a temperature range of 298-322 K. The decays of each reagent were measured with nuclear magnetic resonance (NMR) and high-performance liquid chromatography-high-resolution mass spectrometry (HPLC-HRMS). Incorporating additional SO 4 •- reactions into models may aid in the understanding of organosulfate formation, radical propagation, and aerosol mass sinks. |
Databáze: |
MEDLINE |
Externí odkaz: |
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