<br>挥发性化学产品排放形成的次生有机气溶胶：模型参数和对人为气溶胶的贡献,Environmental Science & Technology

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挥发性化学产品排放形成的次生有机气溶胶：模型参数和对人为气溶胶的贡献
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2023-08-01 , DOI: 10.1021/acs.est.3c00683
Sreejith Sasidharan ₁ , Yicong He _{1,

2,

3} , Ali Akherati ₁ , Qi Li ₄ , Weihua Li ₄ , David Cocker ₄ , Brian C McDonald ₅ , Matthew M Coggon ₅ , Karl M Seltzer ₆ , Havala O T Pye ₇ , Jeffrey R Pierce ₈ , Shantanu H Jathar ₁

Affiliation

挥发性化学产品（VCP）是碳氢化合物和含氧挥发性有机化合物（OVOC）排放到大气中越来越重要的来源，这些排放物可能作为二次有机气溶胶（SOA）的人为前体发挥重要作用。虽然 VCP 碳氢化合物的 SOA 经常在模型中被考虑，但 VCP OVOC 的 SOA 的形成、演化和特性仍然不确定。我们使用环境室数据和动力学模型来开发 10 种 OVOC 的 SOA 参数，这些 OVOC 代表乙二醇、乙二醇醚、酯、含氧芳烃和胺。模型模拟表明，这些 OVOC 的 SOA 质量产率与广泛研究的 SOA 前驱体（例如，长链烷烃、单萜和单环芳烃）具有相同的量级，并且这些产率与前驱体的碳数呈线性相关。当与美国（US）两个特大城市的排放清单和美国范围内的清单相结合时，我们发现 VCP VOC 与 OH 反应形成的质量与 MOBILE 源一样多的 0.8-2.5× SOA。碳氢化合物（萜烯、支链和环状烷烃）和 OVOC（萜类化合物、乙二醇、乙二醇醚）分别占 VCP 使用产生的 SOA 的 60-75% 和 25-40%。这项工作有助于不断增长的知识体系，专注于研究 VCP VOC 对城市空气污染的贡献。

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Secondary Organic Aerosol Formation from Volatile Chemical Product Emissions: Model Parameters and Contributions to Anthropogenic Aerosol

Volatile chemical products (VCP) are an increasingly important source of hydrocarbon and oxygenated volatile organic compound (OVOC) emissions to the atmosphere, and these emissions are likely to play an important role as anthropogenic precursors for secondary organic aerosol (SOA). While the SOA from VCP hydrocarbons is often accounted for in models, the formation, evolution, and properties of SOA from VCP OVOCs remain uncertain. We use environmental chamber data and a kinetic model to develop SOA parameters for 10 OVOCs representing glycols, glycol ethers, esters, oxygenated aromatics, and amines. Model simulations suggest that the SOA mass yields for these OVOCs are of the same magnitude as widely studied SOA precursors (e.g., long-chain alkanes, monoterpenes, and single-ring aromatics), and these yields exhibit a linear correlation with the carbon number of the precursor. When combined with emissions inventories for two megacities in the United States (US) and a US-wide inventory, we find that VCP VOCs react with OH to form 0.8–2.5× as much SOA, by mass, as mobile sources. Hydrocarbons (terpenes, branched and cyclic alkanes) and OVOCs (terpenoids, glycols, glycol ethers) make up 60–75 and 25–40% of the SOA arising from VCP use, respectively. This work contributes to the growing body of knowledge focused on studying VCP VOC contributions to urban air pollution.

更新日期：2023-08-01

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