AAAR 36th Annual Conference October 16 - October 20, 2017 Raleigh Convention Center Raleigh, North Carolina, USA
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Fluorescent Biological Aerosol Particle Emissions Caused by Human Activities
YILIN TIAN, Yingjun Liu, Pawel Misztal, Jianyin Xiong, Caleb Arata, Allen H. Goldstein, William Nazaroff, University of California, Berkeley
Abstract Number: 657 Working Group: Bioaerosols
Abstract Fluorescent biological aerosol particles (FBAP) emissions caused by human activities were studied via observational monitoring campaigns and manipulation experiments. Two multi-week observational monitoring campaigns (summer 2016 and winter 2017) were conducted in a single-family residence with two occupants in northern California. An ultraviolet aerodynamic particle sizer was used to measure size-resolved FBAP and total particles in real-time. For observational monitoring periods, the UVAPS was located in the kitchen. Information regarding occupant activities, including breakfast, making applesauce, and vacuuming, was obtained from occupant-maintained logs. Wireless environmental monitors, motion sensors, and optical particle counters were distributed throughout the house. For manipulation experiments, the UVAPS was located in the master bedroom, where scripted activities (showering and bed making) were performed. A single-compartment mass balance model was used to estimate FBAP emission rates. Size-resolved adjustment factors, defined as the kitchen total particle concentration to the house average particle concentration ratio, were used to adjust FBAP concentrations measured in the kitchen. Human activities strongly influenced indoor FBAP concentrations. FBAP emission rates (1-10 micrometer diameter) were found to vary from 107 to 108 particles h-1. FBAP emission rates were influenced by particle size and type of activity.