Collaborative Research: CAS: Sunlight- and Oxidant-Induced Transformation of Tire-Derived Contaminants on Roadway-Associated Surfaces

合作研究：CAS：道路相关表面上轮胎源污染物的阳光和氧化剂诱导转化

• 批准号: 2305085
• 负责人: Michael Dodd
• 金额: $ 38.48万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2026-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2305085&HistoricalAwards=false
• 关键词: Collaborative; Research; CAS; Sunlight; Oxidant

With support from the Environmental Chemical Sciences Program of the NSF Division of Chemistry, Ning Dai, Prathima Nalam, and Ravi Ranade at the University at Buffalo-the State University of New York and Michael Dodd and Edward Kolodziej at the University of Washington will study the transformation of tire rubber-derived contaminants on roadway surfaces that are exposed to sunlight and airborne oxidants such as oxygen, ozone, and hydroxyl radical. Particles generated from the wear of tires during transportation on roads contribute substantially to water, soil, and air pollution. The complicated mixture of rubber compounds and proprietary additives arising from such particles, as well as their transformation products, can have severe adverse impacts on ecosystems. Both sunlight and ozone are known reactants in water, but their roles in transforming contaminants on roadway-associated surfaces such as tire rubber, concrete, and asphalt pavements are largely unknown. This project will conduct research to address these critical knowledge gaps. In addition, this project will include a series of synergistic educational activities comprising K-12 teacher and community college outreach, engagement with citizen science groups, and project-based research experiences for undergraduate students. This project will evaluate the independent and combined effects of sunlight and airborne oxidants on the transformation of tire-derived organic contaminants on roadway-associated surfaces. The transformation kinetics, mechanisms, and product compositions from surface reactions will be characterized and compared against expectations for bulk gas and aqueous phase reactions. By using a suite of carefully selected, environmentally relevant contaminants and their structural analogues, the project will yield new insights on interfacial photochemical and redox processes occurring on roadway surfaces, which can enable modeling of the environmental behaviors and potential ecosystem and human health risks of these and many other tire-derived contaminants. Structure-activity relationships determined from this project can be used to inform the selection and/or design of new tire rubber components that are safer to the environment. The findings from this project have the potential to contribute to environmentally safer and more sustainable roadways while informing the development of sustainable, tire rubbers with reduced ecological impact.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NSF化学部环境化学科学计划的支持下，纽约州立大学布法罗大学的Ning Dai，Prathima Nalam和Ravi Ranade在纽约州立大学和迈克尔·多德和华盛顿大学的爱德华·科洛德兹（Edward Kolodziej臭氧和羟基。在道路上运输过程中轮胎磨损产生的颗粒极大地促进了水，土壤和空气污染。橡胶化合物和专有添加剂的复杂混合物及其转化产物引起的，可能对生态系统产生严重的不利影响。阳光和臭氧都是水中已知的反应物，但它们在转化与型橡胶，混凝土和沥青路面上的污染物中的作用在很大程度上是未知的。该项目将进行研究以解决这些关键的知识差距。此外，该项目将包括一系列协同的教育活动，其中包括K-12教师和社区学院外展，与公民科学小组的互动以及针对本科生的基于项目的研究经验。该项目将评估阳光和机源氧化剂对与道路相关表面上轮胎衍生的有机污染物转化的独立和联合作用。将表征表面反应的转化动力学，机制和产物组成，并与对散装气体和水相反应的期望进行比较。通过使用一套精心挑选的，环境相关的污染物及其结构类似物，该项目将产生有关道路表面上发生的界面光化学和氧化还原过程的新见解，这些过程可以实现环境行为以及潜在的生态系统以及潜在的生态系统以及这些质污染物的许多其他污染物的风险。从该项目确定的结构 - 活性关系可用于告知对环境更安全的新轮胎橡胶组件的选择和/或设计。该项目的发现有可能为环境更安全，更可持续的道路做出贡献，同时告知可持续性，轮胎橡胶的生态影响降低。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和更广泛的影响审查标准来评估通过评估来支持的。