Emissions of Secondary Organic Aerosol Precursors from Volatile Chemical Products

挥发性化学产品二次有机气溶胶前体的排放

• 批准号: 1907446
• 负责人: Albert Presto
• 金额: $ 38.91万
• 依托单位: Carnegie-Mellon University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-08-01 至 2023-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1907446&HistoricalAwards=false
• 关键词: Emissions; Secondary; Organic; Aerosol; Precursors

Particulate matter (PM) is directly linked to the important societal problems of public health and climate. Improving our understanding of the emissions and sources of PM addresses both problems. A large fraction of ambient PM is formed via atmospheric oxidation of organic precursor molecules. This project will quantify the emissions of organic precursors and subsequent PM formation from volatile chemical products (VCPs), a largely overlooked class of sources. VCPs include a wide range of non-combustion products including personal care products, fragrances, paints and coatings, and cleaning products, as well as other non-combustion industrial processes. The research results from this project will improve our understanding of the ambient PM burden with a focus on urban areas and will contribute to improved accuracy of PM formation in models. Crucially, this proposal directly addresses PM formation from a previously neglected source class that appears to be increasing in importance. Successful completion of this research will lead to a better characterize potential risks to human and ecological health. Both graduate and undergraduate researchers will participate in the research, and the training they receive will prepare them for successful careers in STEM fields, thus improving the scientific literacy and science preparedness of the Nation. The goal of this project is to quantify the emissions and potential formation of secondary organic aerosol (SOA) from volatile chemical products (VCPs). VCPs are non-combustion organic compounds associated with personal care products, fragrances, paints and coatings, cleaning products, and other non-combustion industrial uses. Recent research suggests that VCPs are an important source of urban SOA. However, there is uncertainty regarding the validity of the hypothesis because it is based upon emissions data that are focused on ozone formation rather than SOA formation potential. This project will address this address this uncertainty through a systematic study of SOA-forming emissions from VCPs under varying conditions. The underlying hypothesis of this research is that VCPs slowly emit low-volatility SOA precursors and that the volatility distribution and SOA formation potential of these emissions evolve over time. The specific objectives of the proposed research are to 1) measure VCP emission rates with a specific focus on SOA precursors as a function of humidity, air exchange rate, and substrate; 2) measure changes in emissions rate, composition, and SOA formation potential from VCPs as a function of time; 3) parameterize VCP emissions of both resolved and unresolved species for use in chemical transport models; and 4) quantify SOA production and composition from VCPs as a function of time and changing emissions. Successful completion of the research will increase our understanding of the contribution of VCPs to ambient SOA formation and address two key knowledge gaps regarding the emission rates and composition of organic vapors from two common VCPs (paints/coatings and adhesives/sealants) and the contribution of these VCP classes to ambient SOA loading. This research will also enable better quantification of the burden of anthropogenic SOAs and subsequent assessment of impacts on climate and human health.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.

颗粒物（PM）与公共卫生和气候等重要社会问题直接相关。提高我们对PM的排放和来源的了解可以解决这两个问题。很大一部分环境PM是通过有机前体分子的大气氧化形成的。该项目将量化挥发性化学产品（VCPs）中有机前体的排放和随后形成的PM，这是一种很大程度上被忽视的来源。vcp包括广泛的非燃烧产品，包括个人护理产品，香水，油漆和涂料，清洁产品，以及其他非燃烧工业过程。该项目的研究结果将提高我们对城市地区环境PM负担的理解，并有助于提高模型中PM形成的准确性。至关重要的是，该建议直接从先前被忽视的源类中处理PM的形成，该源类的重要性似乎正在增加。这项研究的成功完成将有助于更好地描述对人类和生态健康的潜在风险。研究生和本科生都将参与研究，他们所接受的培训将为他们在STEM领域的成功职业生涯做好准备，从而提高国家的科学素养和科学准备。该项目的目标是量化挥发性化学产品（VCPs）的排放和次生有机气溶胶（SOA）的潜在形成。vcp是与个人护理产品、香水、油漆和涂料、清洁产品和其他非燃烧工业用途相关的非燃烧有机化合物。最近的研究表明，vcp是城市SOA的一个重要来源。然而，该假设的有效性存在不确定性，因为它是基于侧重于臭氧形成而不是SOA形成潜力的排放数据。该项目将通过系统研究vcp在不同条件下形成soa的排放来解决这一不确定性。本研究的基本假设是，vcp缓慢地释放低波动性的SOA前体，并且这些排放物的波动性分布和SOA形成潜力随着时间的推移而演变。拟议研究的具体目标是：1)测量VCP排放率，特别关注SOA前体作为湿度、空气交换率和基质的函数；2)测量vcp的排放率、组成和SOA形成潜力随时间的变化；3)将已分解和未分解物种的VCP排放参数化，用于化学输运模型；4)量化vcp的SOA生产和组成作为时间和变化排放的函数。研究的成功完成将增加我们对VCP对环境SOA形成的贡献的理解，并解决两个关键的知识空白，即两种常见VCP（油漆/涂料和粘合剂/密封剂）的排放率和有机蒸汽组成，以及这些VCP类别对环境SOA负载的贡献。这项研究还将有助于更好地量化人为soa的负担，并随后评估对气候和人类健康的影响。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值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

Watching Paint Dry: Organic Vapor Emissions from Architectural Coatings and their Impact on Secondary Organic Aerosol Formation

观察油漆干燥：建筑涂料的有机蒸气排放及其对二次有机气溶胶形成的影响

• DOI: 10.1021/acs.est.2c02478
• 发表时间: 2022
• 期刊: Environmental Science & Technology
• 影响因子: 11.4
• 作者: Tanzer-Gruener, Rebecca;Rajan, Pavithra Ethi;Dugan, Liam D.;Bier, Mark E.;Robinson, Allen L.;Presto, Albert A.
• 通讯作者: Presto, Albert A.