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- W2014626157 abstract "We used proton-transfer-reaction mass spectrometry (PTR−MS) to examine the products formed when ozone reacted with the materials in a simulated aircraft cabin, including a loaded high-efficiency particulate air (HEPA) filter in the return air system. Four conditions were examined: cabin (baseline), cabin plus ozone, cabin plus soiled T-shirts (surrogates for human occupants), and cabin plus soiled T-shirts plus ozone. The addition of ozone to the cabin without T-shirts, at concentrations typically encountered during commercial air travel, increased the mixing ratio (v:v concentration) of detected pollutants from 35 ppb to 80 ppb. Most of this increase was due to the production of saturated and unsaturated aldehydes and tentatively identified low-molecular-weight carboxylic acids. The addition of soiled T-shirts, with no ozone present, increased the mixing ratio of pollutants in the cabin air only slightly, whereas the combination of soiled T-shirts and ozone increased the mixing ratio of detected pollutants to 110 ppb, with more than 20 ppb originating from squalene oxidation products (acetone, 4-oxopentanal, and 6-methyl-5-hepten-2-one). For the two conditions with ozone present, the more-abundant oxidation products included acetone/propanal (8−20 ppb), formaldehyde (8−10 ppb), nonanal (∼6 ppb), 4-oxopentanal (3−7 ppb), acetic acid (∼7 ppb), formic acid (∼3 ppb), and 6-methyl-5-hepten-2-one (0.5−2.5 ppb), as well as compounds tentatively identified as acrolein (0.6−1 ppb) and crotonaldehyde (0.6−0.8 ppb). The odor thresholds of certain products were exceeded. With an outdoor air exchange of 3 h-1 and a recirculation rate of 20 h-1, the measured ozone surface removal rate constant was 6.3 h-1 when T-shirts were not present, compared to 11.4 h-1 when T-shirts were present." @default.
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- W2014626157 date "2005-06-03" @default.
- W2014626157 modified "2023-10-15" @default.
- W2014626157 title "Products of Ozone-Initiated Chemistry in a Simulated Aircraft Environment" @default.
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- W2014626157 doi "https://doi.org/10.1021/es047992j" @default.
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