부산대학교 도서관

The US Environmental Protection Agency's (US EPA) Detroit Exposure and Aerosol Research Study (DEARS) deployed a total of over 2000 nitrogen dioxide, N[O.sub.2], passive monitors during 3 years of field data collections. These 24-h based personal, residential outdoor and community-based measurements allowed for the investigation of N[O.sub.2] spatial, temporal, human and environmental factors. The relationships between personal exposures to N[O.sub.2] and the factors that influence the relationship with community-based measurements were of interest. Survey data from 136 participants were integrated with exposure findings to allow for mixed model effect analyses. Ultimately, 50 individual factors were selected for examination. N[O.sub.2] analyses revealed that season, exposure to environmental tobacco smoke and residential gas appliances were strong influencing factors. Only modest associations between community-based measures of nitrogen dioxide and personal exposures impacted by various exposure factors for heating (r = 0.44) or nonheating seasons (r = 0.34) were observed, indicating that use of ambient-based monitoring as a surrogate of personal exposure might result in sizeable exposure misclassification. Journal of Exposure Science and Environmental Epidemiology (2012) 22, 109-115; doi: 10.1038/jes.2011.20; published online 4 May 2011 Keywords: nitrogen dioxide, DEARS, personal monitoring, exposure factors.
Introduction Allowable community-based concentrations of select air pollutants, including nitrogen dioxide (N[O.sub.2]) are regulated by the US Environmental Protection Agency (EPA) under the Clean Air Act (Clean Air Act, 2004). [...]