Biotechnology

As near-surface oxide orebodies are depleted, mines are having to process deeper sulfide ores that are lower in metal grade and metallurgically more complex. Modern technologies that are simple, cost effective and environmentally sound are required for their extraction. In many cases, bioleaching is the most suitable process.

2009

  • DINKLA, I.J.T., GERICKE, M., GEURKINK, B.K. and HALLBERG, K.B. Acidianus brierley is the dominant thermoacidophile in a bioleaching community processing chalcopyrite containing concentrates at 70°C. Adv. Mat. Res., vol. 71–73, 2009. pp. 67–70.
  • GERICKE, M., GOVENDER, Y., and PINCHES, A. Advances in tank bioleaching of low-grade chalcopyrite concentrates. Adv. Mater. Res., vol. 71–73, 2009. pp. 361–364.
  • GERICKE, M., NEALE, J.W., and VAN STADEN, P.J. A Mintek perspective of the past 25 years in minerals bioleaching. J. S.Afr. Inst. Min. Metall., vol. 109, no. 10, 2009. pp. 567–585.
  • GOVENDER, Y., RIDDIN, T., GERICKE, M., and WHITELEY, C.G. Bioreduction of platinum salt into nanoparticles: a mechanistic perspective. Biotechnol. Lett., vol. 31, 2009. pp. 95–100.
  • NDLOVU, S., SIMATE, G.S., and GERICKE, M.  The microbial assisted leaching of nickel laterites using a mixed culture of chemolithotrophic microorganisms. Adv. Mater. Res., vols. 71–73, 2009. pp. 493–496.
  • NEALE, J.W., ROBERTSON, S.W., MULLER, H.H., and GERICKE, M. Integrated piloting of a thermophilic bioleaching process for the treatment of a low-grade nickel-copper sulphide concentrate. Proceedings of the SAIMM Southern African Hydrometallurgy Conference 2009. Johannesburg, The Southern African Institute Of Mining and Metallurgy, 2009. pp. 119–154.
  • RIDDIN, T.L., GOVENDER, Y., GERICKE, M., and WHITELEY, C.G. Two different hydrogenase enzymes from sulphate reducing bacteria are responsible for the bioreductive mechanism of platinum into nanoparticles. Enzyme Microb. Technol., vol. 45, iss. 4, 2009. pp. 267–273.
  • ROBERTSON, S.W., and VAN STADEN, P.J. The progression of metallurgical testwork during heap leach design. Proceedings of the SAIMM Southern African Hydrometallurgy Conference 2009. Johannesburg, The Southern African Institute Of Mining and Metallurgy, 2009. pp. 31–42.
  • SIMATE, G.S., NDLOVU, S., and GERICKE, M. (2009) Bacterial leaching of nickel laterites using chemolithotrophic microorganisms: process optimisation using response surface methodology and central composite rotatable design. Hydrometallurgy, vol. 98, iss. 3-4, 2009. pp. 241–246.
  • VAN MARWIJK, J., OPPERMAN, D.J., GERICKE, M., and VAN HEERDEN, E. Purification of a gold (III) reducing and nanoparticle producing protein from Thermus scotoductus SA-01. 5th International Conference on Gold Science, Technology and Its Applications. Heidelberg, Germany, 26-29 July, 2009.
  • VAN STADEN, P.J., ROBERTSON, S.W., GERICKE, M., NEALE, J.W., and SEYEDBAGHERI, A. Maximizing the value derived from laboratory test work towards heap leaching design. Base Metals 2009: The Fifth Southern African Base Metals Conference. Johannesburg, The Southern African Institute of Mining and Metallurgy, 2009. 7 pp.