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    Microfluidic solvent extraction of metal ions from industrial grade leach solutions: Extraction performance and channel aging

    Access Status
    Open access via publisher
    Authors
    Priest, C.
    Hashmi, S.
    Zhou, J.
    Sedev, Rossen
    Ralston, J.
    Date
    2013
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Priest, C. and Hashmi, S. and Zhou, J. and Sedev, R. and Ralston, J. 2013. Microfluidic solvent extraction of metal ions from industrial grade leach solutions: Extraction performance and channel aging. Journal Of Flow Chemistry. 3 (3): pp. 76-80.
    Source Title
    Journal Of Flow Chemistry
    DOI
    10.1556/JFC-D-13-00005
    ISSN
    2062-249X
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/62936
    Collection
    • Curtin Research Publications
    Abstract

    Microfluidic solvent extraction (microSX) of metal ions from industrial grade mineral leach solutions was studied. In conventional bulk-scale SX, partially hydrophobic nanoparticles that are present in the leach solution readily adsorb at the liquid-liquid interface of the dispersed droplets, causing delayed or incomplete phase separation and reduce efficiency. In contrast, microSX employs continuous microscopic streams of aqueous and organic phases (without mixing the phases) and, in this way, bypasses the need for a conventional phase separation stage. This makes the technique promising for handling complex leach solutions. The stability of the two-phase flow is considered in terms of the surface wettability and guiding geometry of the microchannel, which determines the Laplace pressure window that stabilizes the liquid-liquid interface. We show that careful characterization of the microchannel wettability, including contact angle hysteresis, is essential to predict long-term flow stability.

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