Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Ozonation of iodide-containing waters: Selective oxidation of iodide to iodate with simultaneous minimization of bromate and I-THMs.

    191307_191307.pdf (519.2Kb)
    Access Status
    Open access
    Authors
    Allard, Sebastien
    Nottle, C.
    Chan, W.
    Joll, Cynthia
    Von Gunten, Urs
    Date
    2013
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Allard, S. and Nottle, C.E. and Chan, A. and Joll, C. and von Gunten, U. 2013. Ozonation of iodide-containing waters: Selective oxidation of iodide to iodate with simultaneous minimization of bromate and I-THMs. Water Research. 47 (6): pp. 1953-1960.
    Source Title
    Water Research
    DOI
    10.1016/j.watres.2012.12.002
    ISSN
    0043-1354
    Remarks

    NOTICE: this is the author’s version of a work that was accepted for publication in Water Research. 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 this work since it was submitted for publication. A definitive version was subsequently published in Water Research, Vol. 47, no. 6, 2013.

    URI
    http://hdl.handle.net/20.500.11937/4522
    Collection
    • Curtin Research Publications
    Abstract

    The presence of iodinated disinfection by-products (I-DBPs) in drinking water poses a potential health concern since it has been shown that I-DBPs are generally more genotoxic and cytotoxic than their chlorinated and brominated analogs. I-DBPs are formed during oxidation/disinfection of iodide-containing waters by reaction of the transient hypoiodous acid (HOI) with natural organic matter (NOM). In this study, we demonstrate that ozone pre-treatment selectively oxidizes iodide to iodate and avoids the formation of I-DBPs. Iodate is non-toxic and is therefore a desired sink of iodine in drinking water. Complete conversion of iodide to iodate while minimizing the bromate formation to below the guideline value of 10 μg L−1 was achieved for a wide range of ozone doses in five raw waters with DOC and bromide concentrations of 1.1–20 mg L−1 and 170–940 μg L−1, respectively. Lowering the pH effectively further reduced bromate formation but had no impact on the extent of iodate and bromoform formation (the main trihalomethane (THM) formed during ozonation). Experiments carried out with pre-chlorinated/post-clarified samples already containing I-DBPs, showed that ozonation effectively oxidized I-THMs. Therefore, in iodide-containing waters, in which I-DBPs can be produced upon chlorination or especially chloramination, a pre-ozonation step to oxidize iodide to iodate is an efficient process to mitigate I-DBP formation.

    Related items

    Showing items related by title, author, creator and subject.

    • Influence of bromide on iodate and iodo-trihalomethane formation during chlorination of iodide-containing waters
      Criquet, J.; Allard, Sebastian; Salhi, E.; Joll, C.; Von Gunten, Urs; Heitz, A. (2012)
      The kinetics of iodate formation during chlorination of iodide-containing waters is a key factor in the formation of iodoorganic compounds. In contrast to bromate, iodate is considered to be non-toxic. A strategy to reduce ...
    • Photodecomposition of iodinated contrast media and subsequent formation of toxic iodinated moieties during final disinfection with chlorinated oxidants
      Allard, Sebastien; Criquet, J.; Prunier, A.; Falantin, C.; Le Person, A.; Yat-Man Tang, J.; Croué, J. (2016)
      Large amount of iodinated contrast media (ICM) are found in natural waters (up to µg.L-1 levels) due to their worldwide use in medical imaging and their poor removal by conventional wastewater treatment. Synthetic water ...
    • Impact of bromide and iodide during drinking water disinfection and potential treatment processes for their removal or mitigation
      Gruchlik, Yolanta; Tan, J; Allard, Sebastian; Heitz, Anna; Bowman, M.; Halliwell, D.; Gunten, U.; Criquet, Justine; Joll, Cynthia (2014)
      In this study, the impact of bromide and iodide on disinfected waters was examined and potential treatment technologies for their removal or mitigation were investigated. Distributed waters from two Western Australian ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.