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Exposure to air pollution in indoor walkways of a suburban city

机译：暴露于郊区城市室内人行道的空气污染

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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.
机译：室内人行道通常与室内污染物的来源相连，如零售店，餐馆和停车库。为了衡量室内赤道市和罗彻斯特市中心的地铁内的空气质量，移动监控平台每月至少部署一次一年。每个采样日测量每次走道型的一九九段，每隔两次测量5分钟。邻近的店面或建筑物类型没有显着影响人行道段测量的空气污染浓度;然而，在一些空间比较中观察到趋势。邻近餐厅的段具有高升高的PM2.5，TVOC和CO2浓度，而升高的O-3和PM10-2.5浓度与停车车库和街道相邻。为一系列步行路线模拟吸入剂量，用于曝光的基线分布，估计健康的中年成年男性行走所有已识别的路线。与此基线案例相比，在用餐时，暴露会增加179-457％（P <0.001，所有污染物）; 15-18％（P <0.001，所有污染物）为老年人口;在年峰值集中期间和11-37％（P <0.001，所有污染物）。在测量的室内人行道上保持低水平的空气污染，通过避免餐点周围的地区，可以大大降低个人风险。

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