暴露的
环境化学
环境科学
大气(单位)
污染
吸入
吸入染毒
化学
环境卫生
气象学
医学
生物
地理
生态学
解剖
作者
Faqiang Zhan,Yuening Li,Chubashini Shunthirasingham,Jenny Oh,Ying Duan Lei,Zhe Lu,Amina Ben Chaaben,Kelsey Lee,Frank A. P. C. Gobas,Hayley Hung,Knut Breivik,Frank Wania
标识
DOI:10.1021/acs.est.4c05204
摘要
Whereas inhalation exposure to organic contaminants can negatively impact human health, knowledge of their spatial variability in the ambient atmosphere remains limited. We analyzed the extracts of passive air samplers deployed at 119 unique sites in Southern Canada between 2019 and 2022 for 353 organic vapors. Hierarchical clustering of the obtained data set revealed four archetypes of spatial concentration variability in the outdoor atmosphere, which are indicative of common sources and similar atmospheric dispersion behavior. "Point Source" signatures are characterized by elevated concentration in the vicinity of major release locations. A "Population" signature applies to compounds whose air concentrations are highly correlated with population density, and is associated with emissions from consumer products. The "Water Source" signature applies to substances with elevated levels in the vicinity of water bodies from which they evaporate. Another group of compounds displays a "Uniform" signature, indicative of a lack of major sources within the study area. We illustrate how such a data set, and the derived spatial patterns, can be applied to support the identification of sources, the quantification of atmospheric emissions, the modeling of air quality, and the investigation of potential inequities in inhalation exposure.
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