UNMIX modeling of ambient PM2.5 near an interstate highway in Cincinnati, OH, USA

被引:44
作者
Hu, Shaohua
McDonald, Rafael
Martuzevicius, Dainius
Biswas, Pratim
Grinshpun, Sergey A.
Kelley, Anna
Reponen, Tiina
Lockey, James
LeMasters, Grace
机构
[1] Washington Univ, St Louis, MO 63130 USA
[2] Univ Cincinnati, Dept Environm Hlth, Cincinnati, OH 45221 USA
[3] Hamilton Cty Dept Environm Serv, Cincinnati, OH USA
关键词
source apportionment; traffic sources; diesel engine exhaust; particles; air pollution;
D O I
10.1016/j.atmosenv.2006.02.038
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The "Cincinnati Childhood Allergy and Air Pollution Study (CCAAPS)" is underway to determine if infants who are exposed to diesel engine exhaust particles are at an increased risk for atopy and atopic respiratory disorders, and to determine if this effect is magnified in a genetically at risk population. In support of this study, a methodology has been developed to allocate local traffic source contributions to ambient PM2.5 in the Cincinnati airshed. As a first step towards this allocation, UNMIX was used to generate factors for ambient PM2.5 at two sites near at interstate highway. Procedures adopted to collect, analyze and prepare the data sets to run UNMIX are described. The factors attributed to traffic sources were similar for the two sites. These factors were also similar to locally measured truck engine-exhaust enriched ambient profiles. The temporal variation of the factors was analyzed with clear differences observed between factors attributed to traffic sources and combustion-related regional secondary sources. (c) 2006 Published by Elsevier Ltd.
引用
收藏
页码:S378 / S395
页数:18
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