Biomass-burning organic aerosols as a pool of atmospheric reactive triplets to drive multiphase sulfate formation DOI Creative Commons
Zhancong Liang, Liyuan Zhou,

Yuqing Chang

и другие.

Proceedings of the National Academy of Sciences, Год журнала: 2024, Номер 121(51)

Опубликована: Дек. 13, 2024

Biomass-burning organic aerosol(s) (BBOA) are rich in brown carbon, which significantly absorbs solar irradiation and potentially accelerates global warming. Despite its importance, the multiphase photochemistry of BBOA after light absorption remains poorly understood due to challenges determining oxidant concentrations reaction kinetics within aerosol particles. In this study, we explored photochemical reactivity particles S(IV) oxidation sulfate. We found that sulfate formation under is predominantly driven by photosensitization involving triplet excited states ( 3 * ) instead iron, nitrate, photochemistry. Rates three orders magnitude higher than those observed bulk solution, primarily fast interfacial reactions. Our results highlight chemistry can greatly contribute sulfate, as an example secondary pollutants. Photosensitization will likely become increasingly crucial intensified wildfires.

Язык: Английский

Enhanced sulfate formation in mixed biomass burning and sea-salt interactions mediated by photosensitization: effects of chloride, nitrogen-containing compounds, and atmospheric aging DOI Creative Commons
Rongzhi Tang,

Jialiang Ma,

Ruifeng Zhang

и другие.

Atmospheric chemistry and physics, Год журнала: 2025, Номер 25(1), С. 425 - 439

Опубликована: Янв. 13, 2025

Abstract. Discrepancies persist between modeled simulations and measured sulfate concentrations in the marine boundary layer, especially when air is influenced by biomass burning plumes. However, there has been a notable dearth of research conducted on interactions sea-salt aerosol plumes, impeding comprehensive understanding formation. This work studied formation mixing real (BB) extracts NaCl, mimicking internal mixtures BB particles. BB–NaCl particles had significantly higher rate than incense (IS)–NaCl For fresh particles, followed trend corn straw (CS)–NaCl > rice (RS)–NaCl wheat (WS)–NaCl IS–NaCl. The filter sample aging was achieved exposure to OH• generated from UV irradiation. After aging, RS–NaCl exhibited highest enhancement rates among all due RS NaCl. Bulk aqueous experiments spiked with NaCl using model photosensitizers (PSs) nitrogen-containing organic compounds (NOCs), pyrazine (CHN), 4-nitrocatechol (CHON) revealed positive effects chloride PS–CHON system negative PS–CHN Our suggests that reaching or near coastal areas can affect via photosensitizer-mediated reactions, potentially exacerbating pollution.

Язык: Английский

Процитировано

0
Biomass-burning organic aerosols as a pool of atmospheric reactive triplets to drive multiphase sulfate formation DOI Creative Commons
Zhancong Liang, Liyuan Zhou,

Yuqing Chang

и другие.

Proceedings of the National Academy of Sciences, Год журнала: 2024, Номер 121(51)

Опубликована: Дек. 13, 2024

Biomass-burning organic aerosol(s) (BBOA) are rich in brown carbon, which significantly absorbs solar irradiation and potentially accelerates global warming. Despite its importance, the multiphase photochemistry of BBOA after light absorption remains poorly understood due to challenges determining oxidant concentrations reaction kinetics within aerosol particles. In this study, we explored photochemical reactivity particles S(IV) oxidation sulfate. We found that sulfate formation under is predominantly driven by photosensitization involving triplet excited states ( 3 * ) instead iron, nitrate, photochemistry. Rates three orders magnitude higher than those observed bulk solution, primarily fast interfacial reactions. Our results highlight chemistry can greatly contribute sulfate, as an example secondary pollutants. Photosensitization will likely become increasingly crucial intensified wildfires.

Язык: Английский

Процитировано

1