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    Understanding the Behaviour of Molecular Weight Fractions of Natural Organic Matter to Improve Water Treatment Processes

    145708_24394_Ina WSTWS full draft.pdf (90.51Kb)
    Access Status
    Open access
    Authors
    Kristiana, Ina
    Allpike, Bradley
    Joll, Cynthia
    Heitz, Anna
    Trolio, R.
    Date
    2010
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Kristiana, I. and Allpike, B. and Joll, C. and Heitz, A. and Trolio, R. 2010. Understanding the Behaviour of Molecular Weight Fractions of Natural Organic Matter to Improve Water Treatment Processes. Water Science & Technology: Water Supply. 10 (1): pp. 59-68.
    Source Title
    Water Science & Technology: Water Supply
    DOI
    10.2166/ws.2010.788
    ISSN
    16069749
    School
    Department of Applied Chemistry
    Remarks

    Copyright © 2010 IWA Publishing

    URI
    http://hdl.handle.net/20.500.11937/7912
    Collection
    • Curtin Research Publications
    Abstract

    Water utilities have experienced increasing pressure to minimise the formation of disinfection by-products (DBPs), as reflected in the increasingly stringent regulations and guidelines for the concentrations of DBPs in drinking water. Understanding the disinfection characteristics and molecular weight (MW) distribution of natural organic matter (NOM) will assist in the optimisation of drinking water treatment processes to minimise the formation of DBPs. This study investigated the disinfection behaviour of MW fractions of NOM isolated from a Western Australian source water. The NOM was fractionated and separated using preparative size exclusion chromatography (SEC) and the fractions were chlorinated in the presence of bromide ion. The larger MW fractions of NOM were found to produce the highest concentrations of DBPs (trihalomethanes, haloacetic acids, haloacetonitriles, haloketones, and haloaldehydes), with the low MW fractions still producing significant amounts of these DBPs. The results also showed a trend of an increasing proportion of brominated DBPs with decreasing MW and aromatic character. Considering that the smaller MW fractions of NOM produce significant amounts of DBPs, with a higher relative contribution from brominated DBPs, water treatment processes need to be optimised for either bromide removal or the removal of aliphatic, small MW fractions of NOM, in order to meet DBP guidelines and regulations.

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