Exposure to air pollution in indoor walkways of a suburban city

被引:4
|
作者
Li, Linhao [1 ,2 ]
Mullan, Aidan F. [3 ]
Clements, Nicholas [1 ,2 ]
机构
[1] Well Living Lab Inc, Rochester, MN 55902 USA
[2] Mayo Clin, Gen Internal Med, Rochester, MN 55905 USA
[3] Mayo Clin, Hlth Sci Res, Rochester, MN 55905 USA
关键词
Indoor air quality; Mobile monitoring; Air pollutant exposure; Spatiotemporal variability; Indoor walkways; PARTICULATE MATTER; PARTICLE RESUSPENSION; ACTIVITY PATTERN; NUMBER CONCENTRATIONS; PERSONAL EXPOSURE; BLACK CARBON; QUALITY; PM2.5; URBAN; ENVIRONMENTS;
D O I
10.1016/j.buildenv.2020.107171
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Indoor walkways are often connected to sources of indoor pollutants such as retail stores, restaurants, and parking garages. To measure the air quality within indoor skyways and subways in downtown Rochester, MN, a mobile monitoring platform was deployed at least once per month for one year. Nineteen segments of each walkway type were measured for 5-min intervals twice per sampling day. Adjacent storefront or building type did not significantly impact air pollution concentrations measured in walkway segments; however, trends were observed in some spatial comparisons. Segments adjacent to restaurants had elevated PM2.5, TVOC, and CO2 concentrations, while elevated O-3 and PM10-2.5 concentrations occurred adjacent to parking garages and streets. Inhalation dose was simulated for a range of walking routes for a baseline distribution of exposure, estimated for a healthy middle-aged adult male walking all identified routes. Compared to this baseline case, exposure increased by 179-457% (p < 0.001, all pollutants) when dining; by 15-18% (p < 0.001, all pollutants) for an elderly population; and by 11-37% (p < 0.001, all pollutants) during annual peak concentration periods. Low levels of air pollution are being maintained in the measured indoor walkways, and personal exposure can be significantly reduced by avoiding restaurant-dense areas around mealtimes.
引用
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页数:15
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