{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["7(5)"],"submitter":["De Haan DO"],"pubmed_abstract":["Aqueous-phase dark reactions during the co-oxidation of glyoxal and S(IV) were recently identified as a potential source of brown carbon (BrC). Here, we explore the effects of sunlight and oxidants on aqueous solutions of glyoxal and S(IV), and on aqueous aerosol exposed to glyoxal and SO<sub>2</sub>. We find that BrC is able to form in sunlit, bulk-phase, sulfite-containing solutions, albeit more slowly than in the dark. In more atmospherically relevant chamber experiments where suspended aqueous aerosol particles are exposed to gas-phase glyoxal and SO<sub>2</sub>, the formation of detectable amounts of BrC requires an OH radical source and occurs most rapidly after a cloud event. From these observations we infer that this photobrowning is caused by radical-initiated reactions as evapora"],"journal":["ACS earth & space chemistry"],"pagination":["1131-1140"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC10201569"],"repository":["biostudies-literature"],"pubmed_title":["Brown Carbon from Photo-Oxidation of Glyoxal and SO<sub>2</sub> in Aqueous Aerosol."],"pmcid":["PMC10201569"],"pubmed_authors":["Dignum JR","Welsh HG","Pennington EA","De Haan AC","Cazaunau M","Hawkins LN","Cui T","De Haan DO","Pangui E","Andretta AD","Doussin JF","Wickremasinghe PD","Surratt JD"],"additional_accession":[]},"is_claimable":false,"name":"Brown Carbon from Photo-Oxidation of Glyoxal and SO<sub>2</sub> in Aqueous Aerosol.","description":"Aqueous-phase dark reactions during the co-oxidation of glyoxal and S(IV) were recently identified as a potential source of brown carbon (BrC). Here, we explore the effects of sunlight and oxidants on aqueous solutions of glyoxal and S(IV), and on aqueous aerosol exposed to glyoxal and SO<sub>2</sub>. We find that BrC is able to form in sunlit, bulk-phase, sulfite-containing solutions, albeit more slowly than in the dark. In more atmospherically relevant chamber experiments where suspended aqueous aerosol particles are exposed to gas-phase glyoxal and SO<sub>2</sub>, the formation of detectable amounts of BrC requires an OH radical source and occurs most rapidly after a cloud event. From these observations we infer that this photobrowning is caused by radical-initiated reactions as evapora","dates":{"release":"2023-01-01T00:00:00Z","publication":"2023 May","modification":"2025-04-06T19:16:03.75Z","creation":"2025-02-19T00:49:56.199Z"},"accession":"S-EPMC10201569","cross_references":{"pubmed":["37223425"],"doi":["10.1021/acsearthspacechem.3c00035"]}}