Fates and spatial variations of accumulation mode particles in a multi-zone indoor environment during the HOMEChem campaign

Abstract

We report on significant spatial gradients of accumulation mode particles emitted during the HOMEChem campaign and assess particle loss pathways.

Assessment of PM2.5 concentrations, transport, and mitigation in indoor environments using low-cost air quality monitors and a portable air cleaner

“…This is likely due to PM 2.5 emissions during cooking activities increasing concentrations in the kitchen, which are then diluted and lost to surface deposition and exfiltration during transport to the bedroom. 70,71 During the nighttime (Fig. 6), this difference dropped to 0–23%, which further confirms the hypothesis that the differential is driven by cooking activities.…”

Nanoscopic Study of Water Uptake on Glass Surfaces with Organic Thin Films and Particles from Exposure to Indoor Cooking Activities: Comparison to Model Systems

“…Surfaces are more prevalent in indoor spaces compared to outdoor environments, with a typical surface area to volume ratio of 3 m –1 , comprising a larger fraction of the overall space. Surfaces influence a range of physical and chemical processes, acting as a sink for deposited aerosols, − partitioning of gaseous compounds, ,− and the formation of new species through surface-mediated reactions or heterogeneous reactions with trace indoor gases. ,− The composition and morphology of surfaces are highly diverse, and their evolution depends largely on location and the emission sources nearby. Modeling and field measurements have shown that thin films and particulate matter cover the surface over time. ,,, In the absence of external perturbations, these films and deposited aerosols can remain on surfaces for long periods of time.…”

From the HOMEChem frying pan to the outdoor atmosphere: chemical composition, volatility distributions and fate of cooking aerosol

“…Thus, any mass loss is driven solely by dilution-driven evaporation. It has been previously shown that deposition and exfiltration (not including venting through window-or door-opening) are too slow to account for spatial variations in particle concentration throughout a house, making dilution the dominate driver of these spatial variations 56 . For simplicity, we therefore assume no losses from deposition or exfiltration.…”