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    Evaluation of zinc and copper for co-inhibition of nitrification in mild nitrified drinking water

    Access Status
    Fulltext not available
    Authors
    Sarker, D.
    Patel, C.
    Heitz, Anna
    Anwar, Faisal
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Sarker, D. and Patel, C. and Heitz, A. and Anwar, F. 2018. Evaluation of zinc and copper for co-inhibition of nitrification in mild nitrified drinking water. Journal of Environmental Chemical Engineering. 6 (2): pp. 2939-2943.
    Source Title
    Journal of Environmental Chemical Engineering
    DOI
    10.1016/j.jece.2018.04.028
    ISSN
    2213-3437
    School
    School of Civil and Mechanical Engineering (CME)
    URI
    http://hdl.handle.net/20.500.11937/66562
    Collection
    • Curtin Research Publications
    Abstract

    Maintaining adequate chloramine and overcoming nitrification are major challenges faced by water utilities where chloramine is used as a disinfectant. Laboratory batch experiments were carried out to evaluate the effectiveness of using zinc and copper as metal inhibitors in drinking water systems under nitrified conditions. The experiments were conducted for bulk water samples that were collected from a real drinking water distribution system. From the batch experimental results, it was found that 0.25 mg/L zinc inhibited nitrification and reduced the chloramine decay rate but that 0.25 mg/L zinc together with 0.2 mg/L copper significantly controlled chloramine decay and inhibited nitrification completely. Biostability analysis showed that the biostable residual concentration (BRC) was lowered with the addition of zinc, and zinc with higher copper concentrations i.e. the lowest BRC was calculated for 0.25 mg/L zinc with 0.2 mg/L copper. Therefore, it can be concluded that zinc alone can be used as an inhibitor of nitrification and chloramine decay but co-inhibition using zinc and copper provides better control of chloramine decay.

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