Investigation of Intermediates Evolutions during Bornite Bioleaching by Mesophilic Mixed Bacteria

Xing Xing Wang; Ming Hao Hu; Xiao Tao Huang; Rui Liao; Hong Bo Zhao; Mao Xin Hong; Jun Wang

doi:10.4028/www.scientific.net/SSP.262.159

Paper Titles

Effect of X-Ray µCT Scanning on the Growth and Activity of Microorganisms in a Heap Bioleaching System
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Pilot-Scale Bioleaching of Metals from Pyritic Ashes
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The Use of Heap Bioleaching as a Pre-Treatment for Platinum Group Metal Leaching
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Bioleaching Experiments on a Low-Grade Complex Zinc Ore from Inner Mongolia
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Investigation of Intermediates Evolutions during Bornite Bioleaching by Mesophilic Mixed Bacteria
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A Comparison of Bioleaching Behavior of Two Pure Chalcopyrite Minerals through Investigating Chalcopyrite Crystallographic Properties
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Effect of Marmatite on Bioleaching Behaviors of Chalcopyrite
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Influence of Citrate on Metal Dissolution and Respiration Rate of Microbial Leaching Cultures
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Research on Bio-Leaching of Nickel-Bearing Tailings in Jilin, China
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HomeSolid State PhenomenaSolid State Phenomena Vol. 262Investigation of Intermediates Evolutions during...

Investigation of Intermediates Evolutions during Bornite Bioleaching by Mesophilic Mixed Bacteria

Abstract:

In this study, bioleaching experiments, X-ray Diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS) were conducted to investigate the intermediates and surface species of bornite leached by mesophilic mixed bacteria of Leptospirillum. ferriphilum and Acidithiobacillus. caldus. Bioleaching experiments results showed that the mixed bacteria induced higher redox potential and significantly increased the copper extractions. In the presence of mesophilic mixed bacteria, bornite bioleaching was not inhibited by jarosite and S₈. The evolution of intermediates during bornite dissolution was proposed: Cu₅FeS₄→ Cu₉Fe₉S₁₆→CuFe₂S₃→CuS→Cu²⁺, the presence of mesophilic mixed bacteria accelerated the dissolution process. XPS spectra showed that the Cu was existed as Cu(I) species in different period, and confirmed that the presence of polysulfide and jarosite.

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Solid State Phenomena (Volume 262)

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159-163

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.262.159

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Online since:

August 2017

Authors:

Xing Xing Wang, Ming Hao Hu, Xiao Tao Huang, Rui Liao, Hong Bo Zhao, Mao Xin Hong, Jun Wang*

Keywords:

Bioleaching, Bornite, Chemical Speciation, Mesophilic Mixed Bacteria, XPS, X-Ray Diffraction (XRD)

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References

[1] D. Bevilaqua, I. Diéz-Perez, C. Fugivara, S., S. Fausto, J.O. Garcia, A. Benedetti, Characterization of Bornite (Cu5FeS4) Electrodes in the Presence of the Bacterium Acidithiobacillus ferrooxidans, J. Braz. Chem. Soc. 14 (2003) 637-644.

DOI: 10.1590/s0103-50532003000400022

Google Scholar

[2] B. Pesic, F.A. Olson, Leaching of Bornite in Acidified Ferric Chloride Solutions, Metall. Trans. B. 14 (1983) 577-588.

DOI: 10.1007/bf02653944

Google Scholar

[3] W. Jun, W. Qin, Y. S. Zhang, Bacterial leaching of chalcopyrite and bornite with native bioleaching microorganism, Trans. Nonferr. Metals Soc. China. 18 (2008) 1468-1472.

DOI: 10.1016/s1003-6326(09)60027-3

Google Scholar

[4] Y. Yang, S. Harmer, M. Chen, Synchrotron-Based Xps and Nexafs Study of Surface Chemical Species During Electrochemical Oxidation of Chalcopyrite, Hydrometallurgy. 156 (2015) 89-98.

DOI: 10.1016/j.hydromet.2015.05.011

Google Scholar

[5] H. B. Zhao, J. Wang, W. Q. Qin, X. H. Zheng, L. Tao, X. W. Gan, G. Z. Qiu, Surface Species of Chalcopyrite During Bioleaching by Moderately Thermophilic Bacteria. Trans. Nonferr. Metals Soc. China. 25 (2015) 2725-2733.

DOI: 10.1016/s1003-6326(15)63897-3

Google Scholar

[6] Y. Li, N. Kawashima, J. Li, A.P. Chandra, A.R. Gerson, A Review of the Structure, and Fundamental Mechanisms and Kinetics of the Leaching of Chalcopyrite. Adv. Coll. Interf. Sci. 197-198 (2013) 1–32.

DOI: 10.1016/j.cis.2013.03.004

Google Scholar