We thank the entire HOMEChem science team of faculty, researchers, and students, over 60 members in total, for operating instruments, volunteering for activities, and contributing to experimental design. We thank the Alfred P. Sloan Foundation for funding the HOMEChem experiment and analysis (G-2017-9944; G-2017-9692; G-2016-7049; G-2016-7050, G-2018-11062; G-2018-11031; G-2018-10128; G-2018-11366; G- 2018-11035, G-2016-7173). JLJ also acknowledges funding from the CIRES Innovative Research Program. Dr Manabu Shiraiwa, Dr Glenn Morrison and the MOCCIE group provided input on experimental design. We acknowledge the Novoselac research group for preparing and operating the test house, the UT Austin CEER staff for logistical support, and the UT Austin Pickle Research Campus for hosting the research project. REO thanks Jesse H. Kroll at MIT for the use of his HR-ToF-AMS for off-line AMS data collection.
Environmental Science Processes & Impacts
Indoor aerosols -- research, Environmental chemistry -- Organic material
The House Observations of Microbial and Environmental Chemistry (HOMEChem) study is a collaborative field investigation designed to probe how everyday activities influence the emissions, chemical transformations and removal of trace gases and particles in indoor air. Sequential and layered experiments in a research house included cooking, cleaning, variable occupancy, and window-opening. This paper describes the overall design of HOMEChem and presents preliminary case studies investigating the concentrations of reactive trace gases, aerosol particles, and surface films. Cooking was a large source of VOCs, CO2, NOx, and particles. By number, cooking particles were predominantly in the ultrafine mode. Organic aerosol dominated the submicron mass, and, while variable between meals and throughout the cooking process, was dominated by components of hydrocarbon character and low oxygen content, similar to cooking oil. Air exchange in the house ensured that cooking particles were present for only short periods. During unoccupied background intervals, particle concentrations were lower indoors than outdoors. The cooling coils of the house ventilation system induced cyclic changes in water soluble gases. Even during unoccupied periods, concentrations of many organic trace gases were higher indoors than outdoors, consistent with housing materials being potential sources of these compounds to the outdoor environment. Organic material accumulated on indoor surfaces, and exhibited chemical signatures similar to indoor organic aerosol.
Locate the Document
Farmer, D. K., Vance, M. E., Abbatt, J. P. D., Abeleira, A., Alves, M. R., Arata, C., ... & DeCarlo, P. F. (2019). Overview of HOMEChem: House Observations of Microbial and Environmental Chemistry. Environmental Science: Processes & Impacts, 21(8), 1280-1300.