AI Article Synopsis
- Indoor air quality has traditionally been thought to be uniform, using single point measurements and box models to represent rooms or houses.
- Recent advanced simulations and extensive measurements reveal that cleaning processes, like bleach use, create varying concentrations of harmful chlorinated compounds throughout a space.
- These variations are influenced by factors like chemical reactions, surface interactions, and ventilation, which are crucial for understanding human exposure to pollutants and how indoor chemicals move outside.
Article Abstract
Historically air constituents have been assumed to be well mixed in indoor environments, with single point measurements and box modeling representing a room or a house. Here we demonstrate that this fundamental assumption needs to be revisited through advanced model simulations and extensive measurements of bleach cleaning. We show that inorganic chlorinated products, such as hypochlorous acid and chloramines generated via multiphase reactions, exhibit spatial and vertical concentration gradients in a room, with short-lived ⋅OH radicals confined to sunlit zones, close to windows. Spatial and temporal scales of indoor constituents are modulated by rates of chemical reactions, surface interactions and building ventilation, providing critical insights for better assessments of human exposure to hazardous pollutants, as well as the transport of indoor chemicals outdoors.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9814873 | PMC |
| http://dx.doi.org/10.1038/s42004-021-00548-5 | DOI Listing |
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