| Title: | Analysis of indoor particles and gases and their evolution with natural ventilation |
| Author(s): | Fortenberry C; Walker M; Dang A; Loka A; Date G; Cysneiros de Carvalho K; Morrison G; Williams B; |
| Address: | "Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, Missouri. Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, Missouri. Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina" |
| ISSN/ISBN: | 1600-0668 (Electronic) 0905-6947 (Print) 0905-6947 (Linking) |
| Abstract: | "The air composition and reactivity from outdoor and indoor mixing field campaign was conducted to investigate the impacts of natural ventilation (ie, window opening and closing) on indoor air quality. In this study, a thermal desorption aerosol gas chromatograph (TAG) obtained measurements of indoor particle- and gas-phase semi- and intermediately volatile organic compounds both inside and outside a single-family test home. Together with measurements from a suite of instruments, we use TAG data to evaluate changes in indoor particles and gases at three natural ventilation periods. Positive matrix factorization was performed on TAG and adsorbent tube data to explore five distinct chemical and physical processes occurring in the indoor environment. Outdoor-to-indoor transport is observed for sulfate, isoprene epoxydiols, polycyclic aromatic hydrocarbons, and heavy alkanes. Dilution of indoor species is observed for volatile, non-reactive species including methylcyclohexane and decamethylcyclopentasiloxane. Window opening drives enhanced emissions of semi- and intermediately volatile species including TXIB, DEET, diethyl phthalate, and carvone from indoor surfaces. Formation via enhanced oxidation was observed for nonanal and 2-decanone when outdoor oxidants entered the home. Finally, oxidative depletion of gas-phase terpenes (eg, limonene and alpha-pinene) was anticipated but not observed due to limited measurement resolution and dynamically changing conditions" |
| Keywords: | "Air Pollutants/*analysis Air Pollution, Indoor/*analysis Environmental Monitoring/methods Gases Housing Humans Missouri Particle Size Particulate Matter Phthalic Acids/analysis Polycyclic Aromatic Hydrocarbons Ventilation/*methods Volatile Organic Compoun;" |
| Notes: | "MedlineFortenberry, Claire Walker, Michael Dang, Audrey Loka, Arun Date, Gauri Cysneiros de Carvalho, Karolina Morrison, Glenn Williams, Brent eng R835751/EPA/EPA/ Research Support, U.S. Gov't, Non-P.H.S. England 2019/07/03 Indoor Air. 2019 Sep; 29(5):761-779. doi: 10.1111/ina.12584. Epub 2019 Aug 1" |
