Physical transformation of ultrafine particles near three Texas roadways

Y. F. Zhu, J. Pudota, A. DenBleyker, E. Michel, E. McDonal-Buller, Matthew Fraser, D. Collins, Y. Jia, A. Clements, D. Allen

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

    1 Scopus citations

    Abstract

    A systematic evaluation of vehicular emitted air pollutants in the vicinity of three Texas roadways, i.e., a heavily traveled arterial highway, dominated by passenger vehicles, a limited access highway, and a heavily traveled surface highway dominated by truck traffic, was carried out. Under inconsistent wind conditions, distances along wind trajectory from the roadway to the sampling points were better metrics for ultrafine particle (UFP) spatial profiles than physical perpendicular distances from the roadway to the sampling points. Under perpendicular wind conditions, for all studied roadway type, particle number concentrations increased when one moves from the upwind side to the downwind side of the roadways and decayed exponentially with increasing distances with sharp concentrations gradient observed within 100-150 m from the roadway. A single exponential decay curve fitted the data collected from all three roadways very well under perpendicular wind conditions. Although no consistent pattern was observed for UFP under parallel wind conditions, for virtually every roadway type, and independent of whether air flow was parallel to or perpendicular to the roadway, particle concentrations returned to background levels within a few hundred meters of the roadway. 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
    Pages1677-1681
    Number of pages5
    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

    Keywords

    • Exponential decay
    • Near roadway
    • Ultrafine particles
    • Vehicular emissions

    ASJC Scopus subject areas

    • Environmental Science(all)
    • Energy(all)

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  • Cite this

    Zhu, Y. F., Pudota, J., DenBleyker, A., Michel, E., McDonal-Buller, E., Fraser, M., Collins, D., Jia, Y., Clements, A., & Allen, D. (2008). Physical transformation of ultrafine particles near three Texas roadways. In 101st Air and Waste Management Association Annual Conference and Exhibition 2008 (pp. 1677-1681). (Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA; Vol. 3).