Examining the Effects of Typical Reagents for Sulfide Flotation on Bio-Oxidation Activity of Ferrous Iron Oxidizing Microorganisms

Abstract:

Mineral separation by froth flotation is widely used around the world for the beneficiation of sulfide ores. Flotation products (typically concentrate) are subjected to metallurgical processes for metal extractions. Bioleaching as a metallurgical procedure indicated many advantages over other traditional techniques (pyro- and hydro-metallurgy). However, organic flotation reagent residuals on the surface of minerals are effective on biological activities of microorganisms. In this work, to extensively study these effects, typical sulfide flotation collectors (Sodium ethyl-xanthate, Potassium isopropyl-xanthate, Potassium isobutyl-xanthate, Potassium amyl-xanthate, and Dithiophosphate (Aero)), and frothers (pine oil (PO) and methyl isobutyl Carbinol (MIBC)) were used in the presence of various bacteria (Acidithiobacillus ferrooxidans and Leptospirillum ferrooxidans) to investigate their effects on bio-oxidation. The results of this investigation can be used to better understand the mechanisms of bio-activities when reagent residues are on the surface of flotation products and they will feed to the bioleaching process.

• Periodical: Solid State Phenomena (Volume 262)
• Pages: 84-87
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.262.84
• Online since: August 2017
• Authors: Mohammad Jafari*, Sied Ziaedin Shafaei, Hadi Abdollahi, Mahdi Gharabaghi, Saeed Chehreh Chelgani, Sina Ghassa
• Keywords: Biooxidation, Collector, Ferrooxidans, Flotation, Frother

References

[1] S. Chen, G. -z. Qiu, W. -q. Qin, Z. -y. Lan, Bioleaching of sphalerite by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans cultured in 9K medium modified with pyrrhotite, J. Cent. South Univer. Technol. 15 (2008) 503-507.

DOI: 10.1007/s11771-008-0095-7

[2] Z. Sadowski, E. Jazdzyk, H. Karas, Bioleaching of copper ore flotation concentrates, Miner. Eng. 16 (2003) 51-53.

DOI: 10.1016/s0892-6875(02)00258-3

[3] M. Jafari, S. Z. A. Shafaei, H. Abdollahi, M. Gharabaghi, S. Chehreh Chelgani, A Comparative Study on the Effect of Flotation Reagents on Growth and Iron Oxidation Activities of Leptospirillum ferrooxidans and Acidithiobacillus ferrooxidans, Minerals. 7 (2016).

DOI: 10.3390/min7010002

[4] N. Deo, K. Natarajan, Biological removal of some flotation collector reagents from aqueous solutions and mineral surfaces, Miner. Eng. 11 (1998) 717-738.

DOI: 10.1016/s0892-6875(98)00058-2

[5] Y. Dong, H. Lin, Influences of flotation reagents on bioleaching of chalcopyrite by Acidthiobacillus ferrooxidans, Miner. Eng. 32 (2012) 27-29.

DOI: 10.1016/j.mineng.2012.03.007

[6] N. Okibe, D. B. Johnson, Toxicity of flotation reagents to moderately thermophilic bioleaching microorganisms, Biotechnol. Lett. 24 (2002) 2011-(2016).

[7] B. Escobar, L. Quiroz, T. Vargas, Effect of flotation and solvent extraction reagents on the bioleaching of a copper concentrate with Sulfolobus metallicus, Adv. Mater. Res. 71-73 (2009) 421-424.

DOI: 10.4028/www.scientific.net/amr.71-73.421

[8] M. P. Silverman, D. G. Lundgren, Studies on the chemoautotrophic iron bacterium Ferrobacillus ferrooxidans: I. An improved medium and a harvesting procedure for securing high cell yields, J. Bacteriol. 77 (1959) 642-651.

DOI: 10.1128/jb.77.5.642-647.1959

[9] D. Rawlings, H. Tributsch, G. Hansford, Reasons why Leptospirillum, -like species rather than Thiobacillus ferrooxidans are the dominant iron-oxidizing bacteria in many commercial processes for the biooxidation of pyrite and related ores, Microbiology. 145 (1999).

DOI: 10.1099/13500872-145-1-5

[10] M. Jafari, S. Z. Shafaei, H. Abdollahi, M. Gharabaghi, S. C. Chelgani, Effect of some flotation reagents on the activity of L. ferrooxidans, Miner. Process. Ext. Met. Rev. 4 (2017) 1-10.

DOI: 10.3390/min7010002

[11] R. Hallmann, A. Friedrich, H. P. Koops, A. Pommerening‐Röser, K. Rohde, C. Zenneck, Physiological characteristics of Thiobacillus ferrooxidans and Leptospirillum ferrooxidans and physicochemical factors influence microbial metal leaching, Geomicrobiol. J. 10 (1992).

DOI: 10.1080/01490459209377920