AGS-PRF: Characterizing the Physicochemical Properties of Primary and Secondary Ultrafine Particles from Brake Emissions

AGS-PRF：表征制动排放中的一次和二次超细颗粒的物理化学性质

• 批准号: 2324901
• 负责人: Madeline Cooke
• 金额: $ 20.2万
• 依托单位: Cooke, Madeline E
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-01-01 至 2025-12-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2324901&HistoricalAwards=false
• 关键词: AGS; PRF; Characterizing; Physicochemical; Properties

In this Postdoctoral Research Fellowship project, the PI will join a team of researchers at the University of California Irvine in order to study the properties of ultrafine aerosol emissions from brake wear via laboratory experiments and a small-scale filter-based field campaign. Aerosol emissions from brake wear has recently been identified as a major contributor to non-exhaust related emissions from the transportation sector and with the ongoing shift to electric vehicles, the relative important of non-exhaust emissions are of growing importance. The PI will additionally collaborate with a local nonprofit organization working towards improved air quality and cleaner air as well as collaborate with filmmakers in order to produce bilingual (English and Spanish) science education videos related to this research. The work includes three research questions: (1) What are the physiochemical properties of ultrafine particles formed from break wear? (2) How do these properties change after undergoing secondary atmospheric processing including oxidation and photodegradation? (3) Are ultrafine particles from brake wear present in ambient samples from Santa Ana, California? There are three main research approaches: (1) laboratory experiments on the formation of ultrafine particles from brake emissions; (2) the use of an oxidation flow reactor to characterize the formation of secondary species; and (3) the collection of ultrafine particles generated from brake wear emissions on filters within Santa Ana, California, and the study of their chemistry via exposure to ultraviolet radiation. Multiple instruments will be used during this project including various mass spectrometers as well as a transmission electron microscope.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.

在这个博士后研究奖学金项目中，PI将加入加州尔湾大学的一个研究团队，通过实验室实验和小规模的基于过滤器的现场活动来研究刹车磨损产生的超细气溶胶排放的特性。来自制动器磨损的气溶胶排放最近已被确定为来自运输部门的非废气相关排放的主要贡献者，并且随着向电动汽车的持续转变，非废气排放的相对重要性越来越重要。PI还将与当地一家致力于改善空气质量和清洁空气的非营利组织合作，并与电影制片人合作，制作与本研究相关的双语（英语和西班牙语）科学教育视频。本工作包括三个研究问题：（1）断裂磨损形成的超细颗粒的物理化学性质是什么？(2)在经历包括氧化和光降解在内的二次大气处理后，这些性质如何变化？(3)来自加州圣安娜的环境样品中是否存在来自制动器磨损的超细颗粒？有三种主要的研究方法：（1）实验室实验的形成超细颗粒的制动排放;（2）使用氧化流动反应器的形成的二次物种的特征;（3）收集超细颗粒产生的制动磨损排放的过滤器内圣安娜，加州，并通过暴露于紫外线辐射的化学研究。该项目将使用多种仪器，包括各种质谱仪以及透射电子显微镜。该奖项反映了NSF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。