Assessing the contributions of outdoor and indoor sources to air quality in London homes of the SCAMP cohort
Assessing the contributions of outdoor and indoor sources to air quality in London homes of the SCAMP cohort
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DOI：
10.1016/j.buildenv.2022.109359
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发表时间：
2022-07
影响因子：
7.4
通讯作者：
T. Vu;G. Stewart;N. Kitwiroon;Shanon Lim;B. Barratt;F. J. Kelly;Rhiannon Thompson;Rachel B. Smith;M. Toledano;S. Beevers
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文献类型：
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作者：
T. Vu;G. Stewart;N. Kitwiroon;Shanon Lim;B. Barratt;F. J. Kelly;Rhiannon Thompson;Rachel B. Smith;M. Toledano;S. Beevers
鉴于许多人通常大部分时间都呆在家里，对家庭环境的准确测量和建模对于估计他们接触空气污染的程度至关重要。本研究结合传感器测量、CMAQ 城市模型和室内质量平衡模型估计的室外空气污染，调查了伦敦住宅中室外和室内污染物对人类暴露的命运和影响。室内PM2.5、PM10和NO2平均浓度分别为14.6、24.7和14.2μgm−3，室外浓度分别为14.4、22.6和21.4μgm−3。颗粒物的平均渗透系数（0.6-0.7）高于NO2的平均渗透系数（0.4）。相反，与颗粒物 (0.1–0.3 h−1) 相比，NO2 (0.5–0.8 h−1) 的损失率更高。厨房环境中PM2.5、PM10和NO2的平均浓度分别为22.0、33.7和20.8μgm−3，其中在烹饪时间（下午6点至7点）每小时浓度最高（分别为437、644和136μgm−3）。与没有室内源的室内背景水平相比，室内源使室内颗粒物和二氧化氮浓度平均增加 26-37%。室外和室内空气交换发挥着重要作用，可将室内空气污染的颗粒物减少 65–86%，二氧化氮减少 42–65%。
Given that many people typically spend the majority of their time at home, accurate measurement and modelling of the home environment is critical in estimating their exposure to air pollution. This study investigates the fate and impact on human exposure of outdoor and indoor pollutants in London homes, using a combination of sensor measurements, outdoor air pollution estimated from the CMAQ-urban model and indoor mass balance models. Averaged indoor concentrations of PM2.5, PM10and NO2were 14.6, 24.7 and 14.2 μg m−3while the outdoor concentrations were 14.4, 22.6 and 21.4 μg m−3, respectively. Mean infiltration factors of particles (0.6–0.7) were higher than those of NO2(0.4). In contrast, higher loss rates were found for NO2(0.5–0.8 h−1) compared to those for particles (0.1–0.3 h−1). The average concentrations of PM2.5, PM10and NO2in kitchen environments were 22.0, 33.7 and 20.8 μg m−3, with highest hourly concentrations (437, 644 and 136 μg m−3, respectively) during cooking times (6–7 pm). Indoor sources increased the indoor concentrations of particles and NO2by an average of 26–37% in comparison to the indoor background level without indoor sources. Outdoor and indoor air exchange plays an important role in reducing air pollution indoors by 65–86% for particles and 42–65% for NO2.