Assessing the effectiveness of a biological recovery of nickel from tailing dumps

E. Fosso-Kankeu; A. F. Mulaba-Bafubiandi; B. B. Mamba; T. G. Barnard

doi:10.1016/j.mineng.2010.11.007

Assessing the effectiveness of a biological recovery of nickel from tailing dumps

E. Fosso-Kankeu, A. F. Mulaba-Bafubiandi, B. B. Mamba, T. G. Barnard

Metallurgy

University of Johannesburg

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The mobilization of nickel from sulphide minerals using sulfuric acid and Bacillus subtilis was examined. The influences of the concentration of acid and bacteria as well as reaction time were considered. Recovery of nickel by interrupted bioreaction was relatively low and exhibited two phases: an active phase (up to 6 h exposure) and a latent phase (over 6 h exposures) reflecting bacterial inhibition by nickel overtime. Nickel was quickly recovered from tailings (20 ppm/h) than from ore (8.07 ppm/h) with biological and acidic methods. It therefore appears that optimum nickel mobilization with B. subtilis will occur in the active phase. Biological method has environmental advantage and thus appropriate for tailing dumps management.

Original language	English
Pages (from-to)	470-472
Number of pages	3
Journal	Minerals Engineering
Volume	24
Issue number	5
DOIs	https://doi.org/10.1016/j.mineng.2010.11.007
Publication status	Published - Apr 2011

Keywords

Bacillus subtilis
Mining ore
Monod-type kinetic
Nickel mobilization
Sulfuric acid
Tailing dumps

ASJC Scopus subject areas

Control and Systems Engineering
General Chemistry
Geotechnical Engineering and Engineering Geology
Mechanical Engineering

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10.1016/j.mineng.2010.11.007

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title = "Assessing the effectiveness of a biological recovery of nickel from tailing dumps",

abstract = "The mobilization of nickel from sulphide minerals using sulfuric acid and Bacillus subtilis was examined. The influences of the concentration of acid and bacteria as well as reaction time were considered. Recovery of nickel by interrupted bioreaction was relatively low and exhibited two phases: an active phase (up to 6 h exposure) and a latent phase (over 6 h exposures) reflecting bacterial inhibition by nickel overtime. Nickel was quickly recovered from tailings (20 ppm/h) than from ore (8.07 ppm/h) with biological and acidic methods. It therefore appears that optimum nickel mobilization with B. subtilis will occur in the active phase. Biological method has environmental advantage and thus appropriate for tailing dumps management.",

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T1 - Assessing the effectiveness of a biological recovery of nickel from tailing dumps

AU - Fosso-Kankeu, E.

AU - Mulaba-Bafubiandi, A. F.

AU - Mamba, B. B.

AU - Barnard, T. G.

PY - 2011/4

Y1 - 2011/4

N2 - The mobilization of nickel from sulphide minerals using sulfuric acid and Bacillus subtilis was examined. The influences of the concentration of acid and bacteria as well as reaction time were considered. Recovery of nickel by interrupted bioreaction was relatively low and exhibited two phases: an active phase (up to 6 h exposure) and a latent phase (over 6 h exposures) reflecting bacterial inhibition by nickel overtime. Nickel was quickly recovered from tailings (20 ppm/h) than from ore (8.07 ppm/h) with biological and acidic methods. It therefore appears that optimum nickel mobilization with B. subtilis will occur in the active phase. Biological method has environmental advantage and thus appropriate for tailing dumps management.

AB - The mobilization of nickel from sulphide minerals using sulfuric acid and Bacillus subtilis was examined. The influences of the concentration of acid and bacteria as well as reaction time were considered. Recovery of nickel by interrupted bioreaction was relatively low and exhibited two phases: an active phase (up to 6 h exposure) and a latent phase (over 6 h exposures) reflecting bacterial inhibition by nickel overtime. Nickel was quickly recovered from tailings (20 ppm/h) than from ore (8.07 ppm/h) with biological and acidic methods. It therefore appears that optimum nickel mobilization with B. subtilis will occur in the active phase. Biological method has environmental advantage and thus appropriate for tailing dumps management.

KW - Bacillus subtilis

KW - Mining ore

KW - Monod-type kinetic

KW - Nickel mobilization

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DO - 10.1016/j.mineng.2010.11.007

M3 - Article

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EP - 472

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Assessing the effectiveness of a biological recovery of nickel from tailing dumps

Abstract

Keywords

ASJC Scopus subject areas

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