Superoxide formation upon photochemical aging of secondary organic aerosols derived from biomass burning precursors.

Lena Gerritz, Meredith Schervish, Pascale S J Lakey, Sergey A Nizkorodov, Manabu Shiraiwa

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In one paragraph

Article in Science advances, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it

0cells of the map it votes in

0citing papers in PubMed

–field-weighted citation impact

1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Lena GerritzDepartment of Chemistry, University of California, Irvine, Irvine, CA, USA.ORCID 0009-0009-9971-1526

Meredith SchervishDepartment of Chemistry, University of California, Irvine, Irvine, CA, USA.ORCID 0009-0002-3365-9007

Pascale S J LakeyDepartment of Chemistry, University of California, Irvine, Irvine, CA, USA.ORCID 0000-0003-2923-4073

Sergey A NizkorodovDepartment of Chemistry, University of California, Irvine, Irvine, CA, USA.ORCID 0000-0003-0891-0052

Manabu ShiraiwaDepartment of Chemistry, University of California, Irvine, Irvine, CA, USA.ORCID 0000-0003-2532-5373

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Photochemical oxidation in the aqueous phase is critical for chemical evolution of secondary organic aerosols (SOA), but it represents one of the most uncertain processes in aerosols and clouds. Here, we show that photoirradiation of SOA derived from biomass burning precursors leads to substantial formation of superoxide. The combination of laboratory measurements and kinetic modeling reveals that superoxide generation is driven by photosensitization reactions in aromatic SOA, while the dominant source of superoxide in biogenic SOA is photoinduced decomposition of carbonyls with minor contributions from peroxide decomposition. These processes serve as a substantial source of reactive oxygen species (ROS) including hydrogen peroxide and hydroxyl radical in cloud droplets and deliquesced particles, competing with traditional sources such as uptake from the gas phase. This previously unrecognized source of ROS will enhance the impact of aqueous-phase processing on composition and properties of aerosols and clouds.

Identifiers

PMID42696578

DOI10.1126/sciadv.aeg1621

PMCPMC13544224

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.