Modeling Secondary Organic Aerosols in China: State of the Art and Perspectives

Current Pollution Reports, Год журнала: 2023, Номер unknown

Опубликована: Янв. 16, 2023

Язык: Английский

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Heterogeneous Reactions of Phenol on Different Components of Mineral Dust Aerosol: Formation of Oxidized Organic and Nitro-Phenolic Compounds

ACS ES&T Air, Год журнала: 2024, Номер 1(4), С. 259 - 272

Опубликована: Фев. 23, 2024

Phenol, a common semi-volatile compound associated with different emissions including from plants and biomass burning, as well anthropogenic its derivatives, are important components of secondary organic aerosols (SOAs). Gas aqueous phase reactions phenol, in the presence photochemical drivers, fairly understood. However, despite observations showing aromatic content within SOA size mass increases during dust episodes, heterogeneous phenol mineral dusts poorly In current study, surface at gas/solid interface SiO2, α-Fe2O3, TiO2 have been investigated. Whereas reversible adsorption occurs on SiO2 surfaces, for both α-Fe2O3 reacts to form wide range OH substituted products. For surfaces that nitrated by gas-phase nitric acid prior exposure unique compounds nitro-phenolic compounds. Moreover, additional chemistry was observed when adsorbed products were exposed SO2 result formation nitrite nitrate redox SO2. Overall, this study reveals extensive complexity prevalent leading surfaces.

Язык: Английский

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Insights Into Formation and Aging of Secondary Organic Aerosol From Oxidation Flow Reactors: A Review

Current Pollution Reports, Год журнала: 2024, Номер 10(3), С. 387 - 400

Опубликована: Апрель 16, 2024

Язык: Английский

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Dramatic decrease of secondary organic aerosol formation potential in Beijing: Important contribution from reduction of coal combustion emission

The Science of The Total Environment, Год журнала: 2022, Номер 832, С. 155045 - 155045

Опубликована: Апрель 8, 2022

Язык: Английский

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Marked impacts of transient conditions on potential secondary organic aerosol production during rapid oxidation of gasoline exhausts

npj Climate and Atmospheric Science, Год журнала: 2023, Номер 6(1)

Опубликована: Июнь 5, 2023

Abstract Vehicle emission is a major source of atmospheric secondary organic aerosols (SOA). Driving condition critical influencing factor for vehicular SOA production, but few studies have revealed the dependence on rapid-changing real-world driving conditions. Here, fast-response oxidation flow reactor system developed and deployed to quantify formation potential under transient Results show that production varies by orders magnitude, e.g., 20–1500 mg kg-fuel −1 12–155 China V VI vehicles, respectively. High speed, acceleration, deceleration are found considerably promote due higher gaseous emissions caused unburned fuel or incomplete combustion. In addition, vehicles significantly reduce potential, yield, acceleration peaks. Our study provides experimental insight parameterization into conditions, which would benefit high time-resolved simulations in urban atmosphere.

Язык: Английский

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

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

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Temperature effects on SOA formation of n-dodecane reaction initiated by Cl atoms

Atmospheric Environment, Год журнала: 2025, Номер unknown, С. 121070 - 121070

Опубликована: Янв. 1, 2025

Язык: Английский

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Contribution of Vehicular Evaporative S/IVOC emission to SOA formation in China

Atmospheric Environment, Год журнала: 2025, Номер unknown, С. 121128 - 121128

Опубликована: Фев. 1, 2025

Язык: Английский

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In-situ Secondary Organic Aerosol Formation from Ambient Air in Suburban Eastern China: Substantially Distinct Characteristics Between Summer and Winter

Atmospheric Environment, Год журнала: 2025, Номер unknown, С. 121295 - 121295

Опубликована: Май 1, 2025

Язык: Английский

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Study of secondary organic aerosol formation and aging using ambient air in an oxidation flow reactor during high pollution events over Delhi

Environmental Research, Год журнала: 2024, Номер 251, С. 118542 - 118542

Опубликована: Фев. 23, 2024

Язык: Английский

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