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    Fate of bulk and trace organics during a simulated aquifer recharge and recovery (ARR)-ozone hybrid process

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    Type
    Article
    Authors
    Yoon, Min
    Drewes, Jorg
    Amy, Gary L.
    KAUST Department
    Biological and Environmental Science and Engineering (BESE) Division
    Center for Desert Agriculture
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2013-11
    Permanent link to this record
    http://hdl.handle.net/10754/563072
    
    Metadata
    Show full item record
    Abstract
    The attenuation of bulk organic matter and trace organic contaminants (TOrCs) was evaluated for various aquifer recharge and recovery (ARR)-ozone (O3) hybrid treatment process combinations using soil-batch reactor and bench-scale ozonation experiments as a proof of concept prior to pilot and/or field studies. In water reclamation and especially potable reuse, refractory bulk organic matter and TOrCs are of potential health concern in recycled waters. In this study, the role of biotransformation of bulk organic matter and TOrCs was investigated considering different simulated treatment combinations, including soil passage (ARR) alone, ARR after ozonation (O3-ARR), and ARR prior to ozonation (ARR-O3). During oxic (aerobic) ARR simulations, soluble microbial-like substances (e.g., higher molecular weight polysaccharides and proteins) were easily removed while (lower molecular weight) humic substances and aromatic organic matter were not efficiently removed. During ARR-ozone treatment simulations, removals of bulk organic matter and TOrCs were rapid and effective compared to ARR alone. A higher reduction of effluent-derived organic matter, including aromatic organic matter and humic substances, was observed in the ARR-O3 hybrid followed by the O3-ARR hybrid. An enhanced attenuation of recalcitrant TOrCs was observed while increasing the ozone dose slightly (O3: DOC=1). TOrC removal efficiency also increased during the post-ozone treatment combination (i.e., ARR-O3). In addition, the carcinogenic wastewater disinfection byproduct N-nitrosodimethylamine (NDMA) was eliminated below the method reporting limit (<5ngL-1) both during ARR treatment alone and the ARR-ozone hybrid. © 2013 Elsevier Ltd.
    Citation
    Yoon, M. K., Drewes, J. E., & Amy, G. L. (2013). Fate of bulk and trace organics during a simulated aquifer recharge and recovery (ARR)-ozone hybrid process. Chemosphere, 93(9), 2055–2062. doi:10.1016/j.chemosphere.2013.07.038
    Sponsors
    This study was funded by WateReuse Research Foundation project WRF 08-05 (Use of ozone in water reclamation for contaminant oxidation), discretionary funds provided by KAUST, and a SABIC postdoctoral fellowship award. The comments and views detailed herein may not necessary reflect the views of the WateReuse Research Foundation, its officers, directors, employees, affiliates or agents. The authors would like to thank collaborators at the Applied Research and Development Center at the Southern Nevada Water Authority for the analysis of TOrCs and also thank Dr. Daniel Gerrity for assisting and providing constructive feedback.
    Publisher
    Elsevier BV
    Journal
    Chemosphere
    DOI
    10.1016/j.chemosphere.2013.07.038
    PubMed ID
    23942016
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.chemosphere.2013.07.038
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC); Center for Desert Agriculture

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