CAREER: Physical transformations of aerosols after transport between indoor and outdoor environments

职业：气溶胶在室内和室外环境之间传输后的物理变化

• 批准号: 2046164
• 负责人: Marina Vance
• 金额: $ 50.77万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-05-15 至 2026-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2046164&HistoricalAwards=false
• 关键词: CAREER; Physical; transformations; aerosols; after

Although outdoor air pollution is known to shorten human lives, people actually spend most of their time indoors. Air inside homes, schools, offices, and other buildings constantly interchanges with outside air. It is thus important to understand how this interchange affects air pollution in both spaces to fully assess human health risk. This is particularly true as outdoor pollution in the USA has decreased in recent decades while indoor sources of air pollution become more important. The goal of this project is to understand how air pollutants known as aerosols (suspensions of fine particles in air) change while they are transported between indoor and outdoor environments. This goal will be achieved through a combination of experiments in laboratory and real-world settings to measure physical and chemical transformations of aerosols. Successful completion of this research will contribute new knowledge about aerosols to protect human health. The research program will be integrated with educational activities to train the next generation of scientists. A key aspect of this effort is a focus on training scientists to become better public communicators to help improve the Nation’s STEM workforce and increase scientific literacy.The goal of this CAREER project is to investigate how physical properties of aerosols change once they are transported between indoor and outdoor environments. This goal will be achieved through three research objectives: i) measure the physical transformation of outdoor aerosols as they are exposed to indoor environmental conditions; ii) quantify the formation of secondary organic aerosols from indoor precursors and the oxidative aging of primary indoor aerosols; and iii) investigate the physical transformations that indoor emissions from a real home undergo in an oxidative environment. Successful completion of this research will generate novel data on secondary organic aerosol precursors that are emitted by indoor activities to contextualize the evidence of indoor air pollutants found in outdoor field campaigns. This work will also inform efforts by environmental health and epidemiological professionals to protect human health, as well as contribute to the development of better instrumentation and low-cost sensors. The research will be integrated with education activities to inspire students to communicate scientific topics to broader audiences. This will encourage the next generation of students to pursue careers in science and engineering, and enhance public understanding of air pollution topics.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.

虽然室外空气污染会缩短人类的寿命，但人们实际上大部分时间都在室内度过。家庭、学校、办公室和其他建筑物内的空气不断与外界空气交换。因此，重要的是要了解这种交换如何影响两个空间的空气污染，以充分评估人类健康风险。这是特别真实的，因为近几十年来美国的室外污染已经减少，而室内空气污染源变得更加重要。该项目的目标是了解空气污染物气溶胶（空气中的细颗粒悬浮物）在室内和室外环境之间传输时如何变化。这一目标将通过实验室和现实环境中的实验相结合来实现，以测量气溶胶的物理和化学变化。这项研究的成功完成将为保护人类健康提供有关气溶胶的新知识。该研究计划将与教育活动相结合，以培养下一代科学家。这项工作的一个关键方面是注重培训科学家成为更好的公共传播者，以帮助提高国家的STEM劳动力和提高科学素养。这个CAREER项目的目标是调查气溶胶的物理性质如何改变，一旦他们在室内和室外环境之间传输。这一目标将通过三个研究目标来实现：i）测量室外气溶胶暴露于室内环境条件时的物理转化; ii）量化室内前体形成的二次有机气溶胶和主要室内气溶胶的氧化老化; iii）调查真实的家庭室内排放物在氧化环境中的物理转化。这项研究的成功完成将产生关于室内活动排放的二次有机气溶胶前体的新数据，以结合室外实地活动中发现的室内空气污染物的证据。这项工作还将为环境卫生和流行病学专业人员保护人类健康的努力提供信息，并有助于开发更好的仪器和低成本传感器。该研究将与教育活动相结合，以激励学生向更广泛的受众传播科学主题。这将鼓励下一代学生从事科学和工程领域的职业，并提高公众对空气污染主题的理解。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。