Multiphase Oxidation and Chlorination Chemistry Involving Biomass Burning-Related Compounds
DOUGLAS COLLINS, Lauren Stettler, Christina Clarke, Olivia Jaye, Ryan Ziskin, Bucknell University
Abstract Number: 310
Working Group: Chemicals of Emerging Concern in Aerosol: Sources, Transformations, and Impacts
Abstract
Wildfires are affecting the air quality of increasingly wide swaths of continental regions, including highly populated areas. The transport of biomass burning smoke through the building envelope can be significant on a mass concentration basis, especially during episodes that exhibit extreme outdoor particulate mass concentrations. This presentation will describe a variety of multiphase chemistry studies aimed at understanding chemistry that may occur within biomass burning aerosol particles and on surfaces that have been contaminated with such aerosol through dry deposition. Many indoor activities can generate significant concentrations (100s of ppb) of reactive trace gases that are known to react with organic surfaces. We will highlight our studies of certain multiphase oxidation and/or chlorination reactions under exposure to gaseous hypochlorous acid (HOCl) and chlorine (Cl2). Our studies document, through both targeted and non-targeted analysis with high-resolution mass spectrometry, important chemical effects associated with varying trace gas exposure, surface film composition, and ambient light levels. A focus will be placed on inspecting the de novo formation of chemical products of potential toxicological concern detected in the condensed and/or gaseous phases.