Atmospheric Carbon Mineralization in an Industrial-Scale Chrysotile Mining Waste Pile
|dc.identifier.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.|
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.
|dc.publisher||American Chemical Society|
|dc.title||Atmospheric Carbon Mineralization in an Industrial-Scale Chrysotile Mining Waste Pile|
|dcterms.source.title||Environmental Science and Technology|
|curtin.department||WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)|
|curtin.accessStatus||Fulltext not available|
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