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    Characterisation of dissolved organic matter in Parisian urban aquatic systems: Predominance of hydrophilic and proteinaceous structures

    Access Status
    Fulltext not available
    Authors
    Pernet-Coudrier, B.
    Varrault, G.
    Saad, M.
    Croue, Jean-Philippe
    Dignac, M.
    Mouchel, J.
    Date
    2011
    Type
    Journal Article
    
    Metadata
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    Citation
    Pernet-Coudrier, B. and Varrault, G. and Saad, M. and Croue, J. and Dignac, M. and Mouchel, J. 2011. Characterisation of dissolved organic matter in Parisian urban aquatic systems: Predominance of hydrophilic and proteinaceous structures. Biogeochemistry. 106 (1): pp. 89-106.
    Source Title
    Biogeochemistry
    DOI
    10.1007/s10533-010-9480-z
    ISSN
    0168-2563
    School
    Curtin Water Quality Research Centre
    URI
    http://hdl.handle.net/20.500.11937/12544
    Collection
    • Curtin Research Publications
    Abstract

    Understanding the nature of organic matter is a necessary first step in assessing contaminant bioavailability and allowing water supply managers to optimise the treatment train in the aim of providing safe and inexpensive drinking water. This study provides further insight into the composition, structure and functional groups of dissolved organic matter (DOM) (both hydrophobic and hydrophilic) from urban aquatic systems by means of various analytical techniques (DAX-8/XAD-4 fractionation, elemental analysis, UV and FTIR spectroscopies, 13C and 15N isotopic analysis, size exclusion chromatography and Pyrolysis-GC-MS). The analytical range chosen for this study constitutes a powerful tool in the characterisation of DOM in urban water. The inclusion of information from one technique to the next might not only serve as a support to each one, but also as a complement. The DOM fraction from treated effluent and, more generally, DOM from urban water (i. e. receiving treated effluent) display a strong hydrophilic characteristic [i. e. low humic substance (HS) content, low SUVA], along with a high distribution in molecular weights observed by SEC and low average molecular weight. Due to the origin of this DOM, proteinaceous structures constitute the main compounds, as observed by FTIR and Py-GC-MS. Such characteristics (i. e. heterogeneity, low average molecular weight and diverse functional groups, which make up a total of N) could explain that DOM from treated effluent displayed a strong reactive potential metals pollutants as previously demonstrated.

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