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    Behaviour and fate of nine recycled water trace organics during managed aquifer recharge in an aerobic aquifer

    162851_162851.pdf (534.0Kb)
    Access Status
    Open access
    Authors
    Patterson, B.
    Shackleton, M.
    Furness, A.
    Bekele, E.
    Pearce, J.
    Linge, Kathryn
    Busetti, Francesco
    Spadek, T.
    Toze, S.
    Date
    2011
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Patterson, B. and Shackleton, M. and Furness, A. and Bekele, E. and Pearce, J. and Linge, Kathryn and Busetti, Francesco and Spadek, T. and Toze, S. 2011. Behaviour and fate of nine recycled water trace organics during managed aquifer recharge in an aerobic aquifer. Journal of Contaminant Hydrology. 122 (1-4): pp. 53-62.
    Source Title
    Journal of Contaminant Hydrology
    DOI
    10.1016/j.jconhyd.2010.11.003
    ISSN
    01697722
    School
    Curtin Water Quality Research Centre (Industry Research Centre)
    Remarks

    NOTICE: This is the author's version of a work that was accepted for publication in Journal of Contaminant Hydrology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to thsi work since it was submitted for publication. A definitive version was subsequently published in Journal of Contaminant Hydrology, 122, 1-4, 2011. DOI: 10.1016/j.jconhyd.2010.11.003

    URI
    http://hdl.handle.net/20.500.11937/9997
    Collection
    • Curtin Research Publications
    Abstract

    The fate of nine trace organic compounds was evaluated during a 12 month large-scale laboratory column experiment. The columns were packed with aquifer sediment and evaluated under natural aerobic and artificial anaerobic geochemical conditions, to assess the potential for natural attenuation of these compounds during aquifer passage associated with managed aquifer recharge (MAR). The nine trace organic compounds were bisphenol A (BPA), 17β-estradiol (E2), 17α-ethynylestradiol (EE2), N-nitrosodimethylamine (NDMA), N-nitrosomorpholine (NMOR), carbamazepine, oxazepam, iohexol and iodipamide. In the loworganic carbon content Spearwood sediment, all trace organicswere non-retardedwith retardation coefficients between 1.0 and 1.2, indicating that these compounds would travel at near groundwater velocities within the aquifer. The natural aerobic geochemical conditions provided a suitable environment for the rapid degradation for BPA, E2, iohexol (half life b1 day). Lag-times for the start of degradation of these compounds ranged from b15 to 30 days. While iodipamide was persistent under aerobic conditions, artificial reductive geochemical conditions promoted via the addition of ethanol, resulted in rapid degradation (half life b1 days). Pharmaceuticals (carbamazepine and oxazepam) and disinfection by-products (NDMA and NMOR) did not degrade under either aerobic or anaerobic aquifer geochemical conditions (half life N50 days). Field-based validation experiments with carbamazepine and oxazepam also showed no degradation. If persistent trace organics are present in recycled waters at concentrations in excess of their intended use, natural attenuation during aquifer passage alonemay not result in extracted watermeeting regulatory requirements. Additional pre treatment of the recycled water would therefore be required.

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