Details:

Alternative Title:
Environ Sci Technol
Personal Author:
Yang, Bo ; Zhang, K. Max ; Xu, W. David ; Zhang, Shaojun ; Batterman, Stuart ; ... More +
Yang, Bo ; Zhang, K. Max ; Xu, W. David ; Zhang, Shaojun ; Batterman, Stuart ; Baldauf, Richard W. ; Deshmukh, Parikshit ; Snow, Richard ; Wu, Ye ; Zhang, Qiang ; Li, Zhenhua ; Wu, Xian Less -
Description:
Nitrogen dioxide (NO|) not only is linked to adverse effects on the respiratory system but also contributes to the formation of ground-level ozone (O|) and fine particulate matter (PM|). Our curbside monitoring data analysis in Detroit, MI, and Atlanta, GA, strongly suggests that a large fraction of NO| is produced during the "tailpipe-to-road" stage. To substantiate this finding, we designed and carried out a field campaign to measure the same exhaust plumes at the tailpipe-level by a portable emissions measurement system (PEMS) and at the on-road level by an electric vehicle-based mobile platform. Furthermore, we employed a turbulent reacting flow model, CTAG, to simulate the on-road chemistry behind a single vehicle. We found that a three-reaction (NO-NO|-O|) system can largely capture the rapid NO to NO| conversion (with time scale ≈ seconds) observed in the field studies. To distinguish the contributions from different mechanisms to near-road NO|, we clearly defined a set of NO|/NO | ratios at different plume evolution stages, namely tailpipe, on-road, curbside, near-road, and ambient background. Our findings from curbside monitoring, on-road experiments, and simulations imply the on-road oxidation of NO by ambient O| is a significant, but so far ignored, contributor to curbside and near-road NO|.
Subjects:
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Air Pollutants Article Environmental Monitoring Nitrogen Dioxide Ozone Particulate Matter Vehicle Emissions
Source:
Environ Sci Technol. 52(8):4574-4582
Pubmed ID:
29565574
Pubmed Central ID:
PMC6463298
Document Type:
Journal Article
Funding:
EPA999999/ImEPA/Intramural EPA/United States ; P30 ES017885/ES/NIEHS NIH HHS/United States ; T42 OH008455/OH/NIOSH CDC HHS/United States
EPA999999/ImEPA/Intramural EPA/United States ; P30 ES017885/ES/NIEHS NIH HHS/United States ; T42 OH008455/OH/NIOSH CDC HHS/United States Less -
Collection(s):
CDC Public Access
Main Document Checksum:
[+]
urn:sha256:ba68648d7f35deffde8e68a551f69627b5098f920ba7d2120cf37ff798752068
Download URL:
https://stacks.cdc.gov/view/cdc/89668/cdc_89668_DS1.pdf
File Type:

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