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    Syntrophic effect of indigenous and inoculated microorganisms in the leaching of rare earth elements from Western Australian monazite

    Access Status
    Fulltext not available
    Authors
    Corbett, M.
    Eksteen, Jacques
    Niu, X.
    Watkin, Elizabeth
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Corbett, M. and Eksteen, J. and Niu, X. and Watkin, E. 2018. Syntrophic effect of indigenous and inoculated microorganisms in the leaching of rare earth elements from Western Australian monazite. Research in Microbiology. 169 (10): pp. 558-568.
    Source Title
    Research in Microbiology
    DOI
    10.1016/j.resmic.2018.05.007
    ISSN
    0923-2508
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/68541
    Collection
    • Curtin Research Publications
    Abstract

    © 2018 Institut Pasteur The unique physiochemical properties exhibited by rare earth elements (REEs) and their increasing application in high-tech industries has created a demand for secure supply lines with established recovery procedures that create minimal environmental damage. Bioleaching experiments conducted on a non-sterile monazite concentrate with a known phosphate solubilising microorganism (PSM) resulted in greater mobilisation of REEs into solution in comparison to experiments conducted on sterile monazite. By combining the native consortia with an introduced PSM, a syntrophic effect between the populations effectively leached a greater amount of REEs than either a single PSM or the indigenous population alone. With sterile monazite, Penicillium sp.CF1 inoculated experiments released a total REE concentration of 12.32 mg L -1 after incubation for 8 days, whereas on non-sterile ore, double the soluble REE concentration was recorded (23.7 mg L -1 ). Comparable effects were recorded with Enterobacter aerogenes, Pantoea agglomerans and Pseudomonas putida. Alterations in the microbial populations during bioleaching of the monazite ore were determined by diversity profiling and demonstrated noticeable changes in community inhabitants over 14 days. The presence of native Firmicutes on the monazite appears to greatly contribute to the increased leaching recorded when using non-sterile monazite for REE recovery.

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