Aerosol Chemistry of Complex Plant Volatile Systems

复杂植物挥发性系统的气溶胶化学

• 批准号: 2035125
• 负责人: Celia Faiola
• 金额: $ 43.48万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-01-01 至 2024-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2035125&HistoricalAwards=false
• 关键词: Aerosol; Chemistry; Complex; Plant; Volatile

This project seeks to provide new mechanistic understanding of atmospheric chemistry associated with complex plant emissions that contribute to the production of secondary organic aerosol (SOA) in the atmosphere. Complex mixtures of plant biogenic volatile organic compound (BVOC) emissions are not currently accounted for in most regional or global aerosol models. This research will help to characterize the chemical behavior of SOA precursors that have not been studied previously, including the important effects of mixtures.The goal of this research is to study critical gaps across a range of chemical complexities in plant emissions that include: (1) single component, low complexity laboratory experiments that focus on acyclic terpenes and oxygenated monoterpenes that are commonly emitted by plants but are underrepresented in the SOA literature, (2) complex volatile mixtures made from synthetic standards (intermediate complexity), and (3) actual plant emissions (highest complexity). Laboratory SOA will be generated via photooxidation or ozonolysis in an oxidation flow reactor (OFR). At least four major data products will be generated for each VOC system to characterize the SOA chemistry: SOA mass yield curves, SOA oxidant exposure curves, Kroll diagrams, and volatility distributions.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目旨在对与复杂植物排放相关的大气化学提供新的机制理解，这些排放有助于在大气中产生二次有机气溶胶（SOA）。目前大多数区域或全球气溶胶模型并未考虑植物生物挥发性有机化合物 (BVOC) 排放的复杂混合物。这项研究将有助于表征以前未研究过的 SOA 前体的化学行为，包括混合物的重要影响。这项研究的目标是研究植物排放中一系列化学复杂性的关键差距，包括：(1) 单组分、低复杂性实验室实验，重点关注植物通常排放但在 SOA 中代表性不足的无环萜烯和含氧单萜。 文献，(2) 由合成标准品制成的复杂挥发性混合物（中等复杂性），以及 (3) 实际工厂排放（最高复杂性）。实验室 SOA 将通过氧化流反应器 (OFR) 中的光氧化或臭氧分解产生。将为每个 VOC 系统生成至少四种主要数据产品来表征 SOA 化学：SOA 质量产率曲线、SOA 氧化剂暴露曲线、克罗尔图和挥发性分布。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优点和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Acute Ozone Exposure Decreases Terpene Emissions from Canary Island Pines

• DOI: 10.2139/ssrn.4237353
• 发表时间: 2023-04
• 期刊: SSRN Electronic Journal
• 作者: Thaomy Vo;C. Faiola

Not all types of secondary organic aerosol mix: two phases observed when mixing different secondary organic aerosol types

• DOI: 10.5194/acp-22-13783-2022
• 发表时间: 2022-11
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: F. Mahrt;Long Peng;J. Zaks;Yuanzhou Huang;Paul E. Ohno;Natalie R. Smith;F. Gregson;Yiming Qin;C. Faiola;S. Martin;S. Nizkorodov;M. Ammann;A. Bertram

Effects of Anthropogenic and Biogenic Volatile Organic Compounds on Los Angeles Air Quality

• DOI: 10.1021/acs.est.1c01481
• 发表时间: 2021-09-08
• 期刊: ENVIRONMENTAL SCIENCE & TECHNOLOGY
• 影响因子: 11.4
• 作者: Gu, Shan;Guenther, Alex;Faiola, Celia
• 通讯作者: Faiola, Celia