Emerging Urban Emissions: How Buildings, Cleaning and Chemistry Link Indoor and Outdoor Air

DELPHINE K. FARMER, Lauren A. Garofalo, Jienan Li, Morgan Selby, John Clark, Alli Salamone, Rachel Greene, Megan Willis, Emily Franklin, Rose K Rossell, Adam De Groodt, Colorado State University

     Abstract Number: 121
     Working Group: Chemicals of Emerging Concern in Indoor and Outdoor Aerosol: Sources, Vectors, Reactivity, and Impacts

Abstract
Each time we breathe, we are exposed to gases and particles in the air. Based on human activity patterns, much of our exposure occurs indoors – but this indoor air includes pollutants of both indoor and outdoor origin. In this presentation, I will highlight how indoor-outdoor interactions and subsequent chemistry can influence aerosol exposure in the context of pollutants including monoterpenes, cooking emissions, building material sources, and other pollutants. For example, ozone of outdoor origin can react with some volatile organic compounds (VOCs) to either create new particles or contribute to secondary organic aerosol formation. Even small changes in isomeric structures can have strong impacts on VOC fate and aerosol impacts. Other anthropogenic chemicals of emerging concern can also be low in concentration, but have substantial health impacts. To investigate processes behind the chemistry of indoor-outdoor interactions, we conducted a series of experiments in an office using both gas- and aerosol-phase mass spectrometry to track chemical perturbations. I will discuss experimental results, and use recent field measurements to place them into the context of urban air pollution.