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    Stormwater and fire as sources of black carbon nanoparticles to Lake Tahoe

    247989.pdf (4.172Mb)
    Access Status
    Open access
    Authors
    Bisiaux, M.
    Edwards, Peter
    Heyvaert, A.
    Thomas, J.
    Fitzgerald, B.
    Susfalk, R.
    Schladow, G.
    Thaw, M.
    Date
    2011
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Bisiaux, M. and Edwards, P. and Heyvaert, A. and Thomas, J. and Fitzgerald, B. and Susfalk, R. and Schladow, G. et al. 2011. Stormwater and fire as sources of black carbon nanoparticles to Lake Tahoe. Environmental Science & Technology. 45 (6): pp. 2065-2071.
    Source Title
    Environmental Science & Technology
    DOI
    10.1021/es103819v
    ISSN
    0013-936X
    School
    Department of Physics and Astronomy
    URI
    http://hdl.handle.net/20.500.11937/49139
    Collection
    • Curtin Research Publications
    Abstract

    Emitted to the atmosphere through fire and fossil fuel combustion, refractory black carbon nanoparticles (rBC) impact human health, climate, and the carbon cycle. Eventually these particles enter aquatic environments, where they may affect the fate of other pollutants. While ubiquitous, the particles are still poorly characterized in freshwater systems. Here we present the results of a study determining rBC in waters of the Lake Tahoe watershed in the western United States from 2007 to 2009. The study period spanned a large fire within the Tahoe basin, seasonal snowmelt, and a number of storm events, which resulted in pulses of urban runo# into the lake with rBCconcentrations up to 4 orders of magnitude higher than midlake concentrations. The results show that rBC pulses from both the fire and urban runoff were rapidly attenuated suggesting unexpectedaggregation or degradation of the particles. We find that those processes prevent rBC concentrations from building up in the clear and oligotrophic Lake Tahoe. This rapid removal of rBC soon after entry into the lake has implications for the transport of rBC in the global aquatic environment and the flux of rBC from continents to the global ocean.

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