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Characteristics and determinants of personal exposure to PM2.5 mass and components in adult subjects in the megacity of Guangzhou, China
Atmospheric Environment ( IF 5 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.atmosenv.2020.117295 Xiao-Cui Chen , Heiko J. Jahn , Tony J. Ward , Hung Chak Ho , Ming Luo , Guenter Engling , Alexander Kraemer
Atmospheric Environment ( IF 5 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.atmosenv.2020.117295 Xiao-Cui Chen , Heiko J. Jahn , Tony J. Ward , Hung Chak Ho , Ming Luo , Guenter Engling , Alexander Kraemer
Abstract Understanding the heterogeneity between ambient concentration and personal exposure is crucial in studies regarding the health risks of air pollution exposure. We performed a panel study with 4–19 (average = 10) repeated personal monitoring in 16 adult subjects (ages 18–30) for three consecutive weeks during the winter and summer of 2011–2012 in the Chinese megacity of Guangzhou. Also, we conducted simultaneous ambient measurements at eight districts (including five urban sites, two suburban locations, and one rural site) of Guangzhou. Significant seasonal variations were shown in personal PM2.5 exposure for most of the analyzed components (p suburban > rural areas for PM2.5 mass and most of the constituents (e.g., carbonaceous aerosols, ions). We applied mixed-effects models to estimate within- and between-subject variance components and determinants of personal PM2.5 exposure after adjusting for potential confounders. The within-subject variance component dominated the total variability (63.7–95.6%) for most of the investigated PM2.5 components. Ambient PM2.5 mass and its components were the dominant predictors and contributors of the corresponding personal exposures (0.11 R c 2
更新日期：2020-03-01
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