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    Colloid-facilitated metal transport in peat filters

    Access Status
    Fulltext not available
    Authors
    Kalmykova, Y.
    Rauch, S.
    Strömvall, A.
    Morrison, Greg
    Stolpe, B.
    Hassellöv, M.
    Date
    2010
    Type
    Journal Article
    
    Metadata
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    Citation
    Kalmykova, Y. and Rauch, S. and Strömvall, A. and Morrison, G. and Stolpe, B. and Hassellöv, M. 2010. Colloid-facilitated metal transport in peat filters. Water Environment Research. 82 (6): pp. 506-511.
    Source Title
    Water Environment Research
    DOI
    10.2175/106143009X12529484815430
    ISSN
    1061-4303
    School
    Sustainability Policy Institute
    URI
    http://hdl.handle.net/20.500.11937/4559
    Collection
    • Curtin Research Publications
    Abstract

    The effect of colloids on metal retention in peat columns was studied, with the focus on colloids from two sources - organic matter leached from peat, and introduced organic and hydrous ferric oxide (HFO) colloids. A significant fraction of metals was found to be associated with peat-produced organic colloids; however the concentrations of organic colloids leached are low (trace concentrations) and temporal and have a limited effect on the efficiency of peat filters. In contrast, the presence of organic and HFO colloids in the input water causes a significant decrease in the performance of peat filters. Organic colloids were identified as the main vector of cadmium, copper, nickel, and zinc, while lead is transported by both organic and HFO colloids. The colloidal distribution of metals obtained in this study has important implications for the mobility of trace metals in porous media. The occurrence of colloids in the input waters and their characteristics must be considered when designing water treatment facilities.

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