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    Atmospheric Carbon Mineralization in an Industrial-Scale Chrysotile Mining Waste Pile

    Access Status
    Fulltext not available
    Authors
    Nowamooz, A.
    Dupuis, Christian
    Beaudoin, G.
    Molson, J.
    Lemieux, J.
    Horswill, M.
    Fortier, R.
    Larachi, F.
    Maldague, X.
    Constantin, M.
    Duchesne, J.
    Therrien, R.
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Nowamooz, A. and Dupuis, C. and Beaudoin, G. and Molson, J. and Lemieux, J. and Horswill, M. and Fortier, R. et al. 2018. Atmospheric Carbon Mineralization in an Industrial-Scale Chrysotile Mining Waste Pile. Environmental Science and Technology. 52 (14): pp. 8050-8057.
    Source Title
    Environmental Science and Technology
    DOI
    10.1021/acs.est.8b01128
    ISSN
    0013-936X
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/72806
    Collection
    • Curtin Research Publications
    Abstract

    Copyright © 2018 American Chemical Society. Magnesium-rich minerals that are abundant in ultramafic mining waste have the potential to be used as a safe and permanent sequestration solution for carbon dioxide (CO2). Our understanding of thermo-hydro-chemical regimes that govern this reaction at an industrial scale, however, has remained an important challenge to its widespread implementation. Through a year-long monitoring experiment performed at a 110 Mt chrysotile waste pile, we have documented the existence of two distinct thermo-hydro-chemical regimes that control the ingress of CO2 and the subsequent mineral carbonation of the waste. The experimental results are supported by a coupled free-air/porous media numerical flow and transport model that provides insights into optimization strategies to increase the efficiency of mineral sequestration at an industrial scale. Although functioning passively under less-than-optimal conditions compared to laboratory-scale experiments, the 110 Mt Thetford Mines pile is nevertheless estimated to be sequestering up to 100 tonnes of CO2 per year, with a potential total carbon capture capacity under optimal conditions of 3 Mt. Annually, more than 100 Mt of ultramafic mine waste suitable for mineral carbonation is generated by the global mining industry. Our results show that this waste material could become a safe and permanent carbon sink for diffuse sources of CO2.

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