Chemical Characteristics of Aerosol Particles and Surface Films during the CASA Field Campaign
CHURCHILL WILKINSON, Delphine K. Farmer, Marina Vance, Dustin Poppendieck, Rachel O'Brien,
University of Michigan Abstract Number: 261
Working Group: Biomass Combustion: Outdoor/Indoor Transport and Indoor Air Quality
AbstractIndoor surfaces play important roles in indoor air quality due to the high surface area to volume ratios in our homes. These films are formed from the deposition of aerosol particles and the sorption of semi-volatile organic compounds and are thus often complex mixtures of organic chemicals. The chemical complexity can expand even further after film formation as the chemicals in the mixture react and age on the surface. The composition of these films will play a role in their behavior indoors, so an improved understanding of the important chemical classes found in these films will help model predictions for partitioning of organic chemicals in indoor air. One important source for chemicals in these films in some areas is aerosol particles from wildfires. Depending on the distance of the building from the fire, these biomass burning organic aerosol particles (BBOA) can reach indoor spaces at different levels of aging. Here, we investigate the chemical composition of size resolved aerosol particles from representative wood smoldering that was injected into the NIST test house during the CASA field campaign. We compare this composition to the surface films found on glass surfaces deployed during these same events.