Air pollutant concentrations near Texas Roadways: Chemical transformation of pollutants

Andrea Clements, Yuling Jia, Matthew Fraser, Yifang Zhu, Jayanth Pudota, Allison DenBleyker, Edward Michel, Donald R. Collins, Elena McDonald-Buller, David T. Allen

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Scopus citations

    Abstract

    Air pollutant concentrations were studied in Highway 71, an arterial highway, dominated by passenger vehicles located in Austin, TX. The air pollutants studied include ultrafine particles (UFP, < 100 nm dia), CO, NOx, VOC, several particle-bound organics (PAH, alkanes, hopanes), several carbonyl species, and PM2.5 mass and carbon content. The chemical interactions associated with the observed fall-off measurements for gas phase pollutants and particle-bound organic species were studied. Mobile measurements for gas phase pollutants showed that pollutants exhibit exponential decay characteristics. CO concentrations decreased comparably to total NOx concentrations with increasing distance from the roadway. NO and NO2 concentrations indicated that NO was converting to NO2 via reaction with O3 pn the length scale of total NOx falloff. Both NO and total NOx decayed exponentially, but NO2 decayed less rapidly because it was chemically generated. Near Highway 71, formaldehyde showed decreasing concentrations with increasing distance downwind of the roadway. Acetaldehyde increased in concentration at the far downwind site. This is an abstract of a paper presented at the 101st AWMA Annual Conference and Exhibition (Portland, OR 6/24-27/2008).

    Original languageEnglish (US)
    Title of host publication101st Air and Waste Management Association Annual Conference and Exhibition 2008
    Pages1682-1689
    Number of pages8
    StatePublished - Dec 1 2008
    Event101st Air and Waste Management Association Annual Conference and Exhibition 2008 - Portland, OR, United States
    Duration: Jun 24 2008Jun 27 2008

    Publication series

    NameProceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA
    Volume3
    ISSN (Print)1052-6102

    Other

    Other101st Air and Waste Management Association Annual Conference and Exhibition 2008
    CountryUnited States
    CityPortland, OR
    Period6/24/086/27/08

    ASJC Scopus subject areas

    • Environmental Science(all)
    • Energy(all)

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  • Cite this

    Clements, A., Jia, Y., Fraser, M., Zhu, Y., Pudota, J., DenBleyker, A., Michel, E., Collins, D. R., McDonald-Buller, E., & Allen, D. T. (2008). Air pollutant concentrations near Texas Roadways: Chemical transformation of pollutants. In 101st Air and Waste Management Association Annual Conference and Exhibition 2008 (pp. 1682-1689). (Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA; Vol. 3).