TY - GEN
T1 - Effects of ore mineralogy on the bioleaching of a Nigerian complex sulphide ore with mixed cultures of mesophilic bacteria
AU - Olubambi, P. A.
AU - Ndlovu, S.
AU - Borode, J. O.
PY - 2006
Y1 - 2006
N2 - The effect of ore mineralogy on the bioleaching of metals from complex sulphides was studied by investigating the bioleaching of zinc and copper from a bulk complex sulphide ore from Ishiagu, Nigeria, using mixed cultures of Thiobacillus ferrooxidans, Thiobacillus thiooxidans and Leptospirillum in mechanically stirred reactors at varying particle sizes. Mineral phases within the varied particle sizes of-53, 53, 75 and 106μm were identified using X-Ray Diffraction (XRD), while the elemental distribution within the varied particles sizes was determined by X-Ray Fluorescence (XRF) and Optical Emission Spectrometry using Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES). Bulk ore and the leached residues were examined by X-Ray Diffraction. The highest bioleaching recoveries were obtained at particle size of 75μm, while particle size of 106μm gave the least recoveries. Lower recoveries at particle sizes of 53 and -53 μm were as a result of their higher silica and siderite content which affects pH, iron mobility and oxidation.
AB - The effect of ore mineralogy on the bioleaching of metals from complex sulphides was studied by investigating the bioleaching of zinc and copper from a bulk complex sulphide ore from Ishiagu, Nigeria, using mixed cultures of Thiobacillus ferrooxidans, Thiobacillus thiooxidans and Leptospirillum in mechanically stirred reactors at varying particle sizes. Mineral phases within the varied particle sizes of-53, 53, 75 and 106μm were identified using X-Ray Diffraction (XRD), while the elemental distribution within the varied particles sizes was determined by X-Ray Fluorescence (XRF) and Optical Emission Spectrometry using Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES). Bulk ore and the leached residues were examined by X-Ray Diffraction. The highest bioleaching recoveries were obtained at particle size of 75μm, while particle size of 106μm gave the least recoveries. Lower recoveries at particle sizes of 53 and -53 μm were as a result of their higher silica and siderite content which affects pH, iron mobility and oxidation.
KW - Bioleaching
KW - Complex sulphide ore
KW - Ore mineralogy
KW - Particle size
UR - http://www.scopus.com/inward/record.url?scp=33846075356&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:33846075356
SN - 0873396332
SN - 9780873396332
T3 - 2006 TMS Fall Extraction and Processing Division: Sohn International Symposium
SP - 561
EP - 572
BT - Sohn International Symposium
T2 - 2006 TMS Fall Extraction and Processing Division: Sohn International Symposium
Y2 - 27 August 2006 through 31 August 2006
ER -