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    USE OF DRINKING WATER TREATMENT RESIDUALS AS A SOIL AMENDMENT FOR STORMWATER NUTRIENT TREATMENT

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    No. of downloads: 483

    Date
    2010
    Author
    O'Neill, Sean William
    Advisor
    Davis, Allen P
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    Abstract
    Stormwater runoff has been implicated as a major source of excess nutrients to surface waters, contributing to the development of eutrophic conditions. Bioretention, a promising technology for urban stormwater pollution treatment, was investigated to determine if an aluminum-based water treatment residual (WTR) amended bioretention soil media (BSM) could adsorb phosphorus to produce discharge concentrations below 25 μg/L. Batch, small column, and vegetated column studies were employed to determine both the optimal BSM mixture and media performance. Media tests demonstrated P adsorption proportional to WTR addition. Final selected experimental media consisted of 75% sand, 10% silt, 5.8% clay, 5.2% WTR, and 3.4% bark mulch (air dry mass basis).This media showed excellent P removal relative to a non-WTR-amended media. Whereas the control media leached P (71.1% increase in mass), the experimental media adsorbed 85.7% of the P mass applied, displaying a cumulative effluent EMC of 16.1 μg/L, below the 25 μg/L goal.
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    http://hdl.handle.net/1903/10973
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    • Civil & Environmental Engineering Theses and Dissertations
    • UMD Theses and Dissertations

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