Ozone generation and chemistry from 222 nm germicidal ultraviolet light in a fragrant restroom.

ABSTRACT: Devices using 222 nm germicidal ultraviolet light (GUV222) have been marketed to reduce virus transmission indoors with low risk of occupant harm from direct UV exposure. GUV222 generates ozone, an indoor air pollutant and oxidant, under constrained laboratory conditions, but the chemistry byproducts of GUV222-generated ozone in real indoor spaces is uncharacterized. We deployed GUV222 in a public restroom, with an air change rate of 1 h^-1 one weekend and 2 h^-1 the next, to measure ozone formation and byproducts generated from ozone chemistry indoors. Ozone from GUV222 increased background concentrations by 5 ppb on average for both weekends and reacted rapidly (e.g., at rates of 3.7 h^-1 for the first weekend and 2.0 h^-1 for the second) wi

SUBMITTER: Link MF 

PROVIDER: S-EPMC11421862 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature