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- W4319170674 abstract "Indoor particulate matter (PM) sources pose great danger to air quality. This study used an environmental chamber to measure mass-normalized oxidative potential (OPM, a metric for intrinsic toxicity) and emission rates of nine indoor PM2.5 sources, including mainstream tobacco smoke, side-stream tobacco smoke, mosquito repellent coil, incense, moxa, scented candles, tobacco-heated e-cigarettes, liquid-heated e-cigarettes, and mosquito repellent electric mat. A dithiothreitol assay was used to measure the oxidative potential. A mass balance-based model was fitted to PM2.5 mass concentration records to calculate PM2.5 emission rates. Volume-standardized oxidative potential (OPV) exposure was calculated in a model room based on PM2.5 emission rate, and OPM obtained in this study. Overall, combustion sources were more detrimental than non-combustion sources. The highest and lowest mean OPM was found in the PM2.5 samples from side-stream tobacco smoke (99.5 pmol/min/μg) and the liquid-heated e-cigarette (1.3 pmol/min/μg), respectively. PM2.5 emission rates of indoor sources varied from 3153.9 μg/min (mainstream tobacco smoke) to 4.0 μg/min (scented candle). In the modeling room, PM2.5 from mosquito repellent coil showed the highest mean OPV (5.9 nmol/min/m3), although its mean mass concentration ranked second. OPV exposure caused by first-hand tobacco-heated e-cigarettes in one day was comparable to that caused by ambient PM2.5." @default.
- W4319170674 created "2023-02-04" @default.
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- W4319170674 date "2023-02-01" @default.
- W4319170674 modified "2023-09-30" @default.
- W4319170674 title "Emission and oxidative potential of PM2.5 generated by nine indoor sources" @default.
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- W4319170674 doi "https://doi.org/10.1016/j.buildenv.2023.110021" @default.
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