Authors: Pabst, T; Molson, J; Aubertin, M; Bussière, B


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Pabst, T, Molson, J, Aubertin, M & Bussière, B 2011, 'Physical and geochemical transport modelling of pre-oxidised acid-generating tailings with a monolayer cover', in AB Fourie, M Tibbett & A Beersing (eds), Mine Closure 2011: Proceedings of the Sixth International Conference on Mine Closure, Australian Centre for Geomechanics, Perth, pp. 323-332,

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This paper presents the results of an investigation on the efficiency of a monolayer cover placed on sulphidic tailings to control acid mine drainage. The study involved column tests and simulations conducted with a reactive transport model. A large column was filled with partially oxidised tailings covered with a single layer of relatively fine grained material. Monthly wetting and drying cycles were applied. The leachate was sampled for chemical analysis, including the pH, electrical conductivity, and the concentrations of sulphate and iron. Mineralogical analyses were also performed to obtain the parameters required for the simulations. The numerical model was used to simulate the flow of water and oxygen, as well as geochemical reactive transport in the column. The column model was calibrated using laboratory measurements. Additional simulations were conducted to extrapolate results over space and time. Alternative reclamation methods are also analysed.

Aachib, M. Aubertin, M. and Chapuis, R.P. (1994) Column tests investigation of milling wastes properties used to build cover systems, International Land Reclamation and Mine Drainage Conference, Pittsburgh, Vol. 2,
pp. 128–137.
Aachib, M., Aubertin M. and Chapuis, R.P. (1998) Étude en laboratoire de la performance d'un système de recouvrement multicouche sur des rejets miniers, CIM/CIMM/MICA Montreal’98, 8 p.
Aachib, M., Mbonimpa, M. and Aubertin, M. (2004) Measurement and prediction of the oxygen diffusion coefficient in the unsaturated media, with applications to soil covers, Water, Air and Soil Pollution, Vol. 156, pp. 163–193.
Allison, J.D., Brown, D.S. and Novo-Gradac, K.J. (1991) MINTEQA2/PRODEFA2, a geochemical assessment model for environmental systems: version 3.0 User’s manual, USEPA, Athens, GO, 115 p.
Aubertin, M., Bussière, B. and Bernier, L. (2002) Environnement et Gestion des Rejets Miniers, Manual on CD-ROM, Presses Internationales Polytechnique, Montreal, Canada.
Aubertin, M., Chapuis, R.P., Aachib, M., Ricard, J.F., Tremblay, L. and Bussière, B. (1994) Cover technology for acidic tailings: Hydrogeological properties of milling wastes used as capillary barrier, Proceedings 1st International Congress of Environmental Geotechnics, Edmonton, pp. 427–432.
Aubertin, M., Mbonimpa, M., Bussière, B. and Chapuis, R.P. (2003) A model to predict the unsaturated hydraulic conductivity from basic geotechnical properties, Canadian Geotechnical Journal, Vol. 40(6), pp. 1104–1122.
Aubertin, M., Molson, J., Bussière, B. and Dagenais, A.M. (2006) Investigations of layered cover systems acting as oxygen barriers to limit acid mine drainage, Proceedings 5th ICEG Environmental Geotechnics: Opportunities, Challenges and Responsibilities for Environmental Geotechnics, H.R. Thomas (ed), 26–30 June 2006, Cardiff UK, Thomas Telford, Vol. 2, pp. 827–835.
Bussière, B., Aubertin, M. and Chapuis, R.P. (2003) The behavior of inclined covers used as oxygen barriers, Canadian Geotechnical Journal, Vol. 40(3), pp. 512–535.
Bussière, B., Benzaazoua, M., Aubertin, M. and Mbonimpa, M. (2004) A laboratory study of covers made of low-sulphide tailings to prevent acid mine drainage, Environmental Geology, Vol. 45(5), pp. 609–622.
Bussière, B., Maqsoud, A., Aubertin, M., Martschuk, J., McMullen J. and Julien, M. (2006) Performance of the oxygen limiting cover at the LTA site, Malartic, Quebec, CIM Bulletin, Vol. 1(6), pp. 1–11.
Chapuis, R.P. and Aubertin, M. (2003) On the use of the Kozeny-Carman equation to predict the hydraulic conductivity of soils, Canadian Geotechnical Journal, Vol. 40(3), pp. 616–628.
Davies, G.B. and Ritchie, A.I.M. (1986) A model of oxidation in pyritic mine wastes: I. Equations and approximated solutions, Applied Mathematical Modelling, Vol. 10, pp. 314–322.
Jambor, J.L. (1994) Mineralogy of sulfide-rich tailings and their oxidation products, Short Course Handbook on Environmental Geochemistry of Sulfide Mine-Wastes, D.W. Blowes and J.L. Jambor (eds).
Jurjovec, J., Blowes, D.W., Ptacek, C.J. and Mayer, K.U. (2004) Multicomponent reactive transport modeling of acid neutralisation reactions in mine tailings, Water Resources Research, Vol. 40, 11 p.
Mayer, K.U., Benner, S.G. and Blowes, D.W. (1999) The reactive transport model Min3p – Application to acid mine drainage generation and treatment – Nickel Rim Mine site, Sudbury, Ontario, Sudbury’99 Conference on Mining and the Environment, Sudbury, ON.
Mayer, K.U., Frind, E.O. and Blowes, D.W. (2002) Multicomponent reactive transport modeling in variably saturated porous media using a generalised formulation for kinetically controlled reactions, Water Resources Research, Vol. 38(9), p. 1174.
Mbonimpa, M., Aubertin, M., Aachib, M. and Bussière, B. (2003) Diffusion and consumption of oxygen in unsaturated cover materials, Canadian Geotechnical Journal, Vol. 40(5), pp. 916–932.
Mbonimpa, M., Aubertin, M., Chapuis, R.P. and Bussière, B. (2002) Practical pedotransfer functions for estimating the saturated hydraulic conductivity, Geotechnical and Geological Engineering, Vol. 20(3), pp. 235–259.
MEND (2001) MEND Manual, Prevention and control, Vol. 4, Energy, Mines and Resources Canada.
Molson, J., Aubertin, M., Bussière, B. and Benzaazoua, M. (2008) Geochemical transport modelling of drainage from experimental mine tailings cells covered by capillary barriers, Applied Geochemistry, Vol. 23, pp. 1–24.
Molson, J.W., Fala, O., Aubertin, M. and Bussière, B. (2005) Numerical simulations of pyrite oxidation and acid mine drainage in unsaturated waste rock piles, Journal of Contaminant Hydrology, Vol. 78, pp. 343–371.
Mualem, Y. (1976) A new model for predicting the hydraulic conductivity of unsaturated porous media, Water Resources Research, Vol. 12, pp. 513–522.
Nicholson, R.V. (1994) Chapter 6: Iron-sulfide oxidation mechanisms: Laboratory studies, Short Course Handbook on Environmental Geochemistry of Sulfide Mine-Wastes, D.W. Blowes and J.L. Jambor (eds), pp. 164–183.
Nicholson, R.V., Gillham, R.W., Cherry, J.A. and Reardon, E.J. (1989) Reduction of acid generation in mine tailings through the use of moisture-retaining layers as oxygen barriers, Canadian Geotechnical Journal, Vol. 26, pp. 1–8.
Nordstrom, D.K. (2000) Advances in the hydrogeochemistry and microbiology of acid mine waters, International Geological Review, Vol. 42, pp. 499–515.
Nordstrom, D.K. and Southam, G. (1997) Geomicrobiology of sulfide mineral oxidation, Geomicrobiology: Interactions between microbes and minerals, Reviews in Mineralogy and Geochemistry, Vol. 35, pp. 361–385.
Orava, D.A. and Swinder, R.C. (1996) Inhibiting acid mine drainage throughout the mine life cycle, CIM Bulletin, Vol. 98(999), pp. 52–56.
Ouangrawa, M. (2007) Etude expérimentale et analyse numérique des facteurs qui influencent le comportement hydro-géochimique de résidus miniers sulfureux partiellement submergés, Ph.D. Thesis, Mineral Engineering, Ecole Polytechnique de Montréal, 428 p.
Ouangrawa, M., Aubertin, M., Molson, J., Bussière, B. and Zagury, G.J. (2010) Preventing acid mine drainage with an elevated water table: Long-term column experiments and parameter analysis, Water, Air and Soil Pollution, Vol. 213, pp. 437–458.
Ouangrawa, M., Molson, J., Aubertin, M., Bussière, B. and Zagury, G.J. (2009) Reactive transport modelling of mine tailings columns with capillarity-induced high water saturation for preventing sulfide oxidation, Applied Geochemistry, Vol. 24, pp. 1312–1323.
Pabst, T. (2011) Analyse de divers recouvrements pour la restauration d’anciens parcs à résidus miniers générateurs d’acide, Ph.D. Thesis, Mineral Engineering, Ecole Polytechnique de Montréal (in preparation).
Pabst, T., Aubertin, M., Bussière, B. and Molson, J. (2010) Analysis of monolayer covers for the reclamation of acid-generating tailings – Column testing and interpretation, Proceedings 63rd Canadian Geotechnical Conference and 1st Joint CGS/CNC-IPA Permafrost Specialty Conference, Calgary 2010, pp. 1119–1127.
Pabst, T., Aubertin, M., Bussière, B. and Molson, J. (2011) Column tests to assess water flow and oxygen transport in monolayer covers for the reclamation of acid-generating tailings, in Proceedings Sixth International Conference on Mine Closure (Mine Closure 2011), A.B. Fourie, M. Tibbett and A. Beersing (eds), 19–21 September 2011, Lake Louise, Canada, Australian Centre for Geomechanics, Perth, pp. 313–322.
Richards, L.A. (1931) Capillary conduction of liquids in porous mediums, Physics, Vol. 1, pp. 318–333.
Romano, C.G., Mayer, K.U., Jones, D.R., Ellerbroek, D.A. and Blowes, D.W. (2003) Effectiveness of various cover scenarios on the rate of sulfide oxidation of mine tailings, Journal of Hydrology, Vol. 271, pp. 171–187.
van Genuchten, M.Th. (1980) A closed-form equation for predicting the hydraulic conductivity of unsaturated soils, Soil Sciences Society of America Journal, Vol. 44, pp. 892–898.
Yanful, E.K. and Catalan, L.J.J. (2002) Predicted and field-measured resuspension of flooded mine tailings, ASCE Journal of Environmental Engineering, Vol. 128, pp. 341–351.

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