BATCH BIOLEACHING OF A GOLD - BEARING PYRITE OF MOTAH MINE - ISPHAHAN BY THE MIXED CHEMOLITHOTROPHIC BACTERIAL CULTURES

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VAHABZADEH F.; NIKNEJADI A.; BONAKDARPOUR B.; GHAFOURIAN H.

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Journal Paper

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Journal: AMIRKABIR Year:2002 | Volume:13 | Issue:49 Page(s): 46-55

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Information Journal Paper

Title

BATCH BIOLEACHING OF A GOLD - BEARING PYRITE OF MOTAH MINE - ISPHAHAN BY THE MIXED CHEMOLITHOTROPHIC BACTERIAL CULTURES

Author(s)

VAHABZADEH F. | NIKNEJADI A. | BONAKDARPOUR B. | GHAFOURIAN H. | Issue Writer Certificate

Keywords

BACTERIAL OXIDATION

REFRACTORY ORES

BIOLEAHING OF SULFIDIC PYRITE

THIOBACLLI

LEPTOSPIRILLI

Abstract

In the extraction of number of metal with high unit price such as gold of certain types of sulfidic minerals in the ore makes some difficulties in the way of using common processes such as cyanidation. With reference to the diversity of biotechnology area, many researche have been conducted using microorganisms for treating the REFRACTORY ORES. Certain groups of bacteria have capacity to use inorganic materials such as minerals to obtain energy for their metabolic activites and living. Considering oxidation and/or solubilization of the sulfidic minerals these reactions could cause the loss of integration of the sulfidic network and result is the liberation of gold from its encapsulating materix. Microbial solubilization and/or oxidation are the basis for using bioleaching process as a pretreatment of refractory gold bearing sulfide ores prior to the cyanidation. In this research a mixed cultures of mesoPhiliC chemolitoautotrophic bacteria (Thiobacillus ferrooxidans, Thiobacillus thiooxidans and Leptospirillum ferrooxidans) have been used to conduct batch bioleaching of sulfidic pyrite of Motah mine, - Isphahan. With reference to biological function (s) of each of these three individual bacterial species on iron and sulfur fractions of the pyrite sample the amount of iron extracted was measured and by obtaining the time coures of iron dissolution by the mixed cultures - rate of the bioleaching was determined. Comparing these results with that from using only T. ferrooxidans, one could see some improvements. The roles of each of these bacteria in reference to the suggested mechanism and with regards to the results obtained in this resarch have been discussed. All of these show the positive functions of mixed - hacterial cultures relative to mono - bacterial culture in bioleaching of sulfidic pyrite. Similar findings have heen reported by a number of reseachers, the results of this work thus cold he emphesized in this way.

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APA: Copy

VAHABZADEH, F., NIKNEJADI, A., BONAKDARPOUR, B., & GHAFOURIAN, H.. (2002). BATCH BIOLEACHING OF A GOLD - BEARING PYRITE OF MOTAH MINE - ISPHAHAN BY THE MIXED CHEMOLITHOTROPHIC BACTERIAL CULTURES . AMIRKABIR, 13(49), 46-55. SID. https://sid.ir/paper/532325/en

Vancouver: Copy

VAHABZADEH F., NIKNEJADI A., BONAKDARPOUR B., GHAFOURIAN H.. BATCH BIOLEACHING OF A GOLD - BEARING PYRITE OF MOTAH MINE - ISPHAHAN BY THE MIXED CHEMOLITHOTROPHIC BACTERIAL CULTURES . AMIRKABIR[Internet]. 2002;13(49):46-55. Available from: https://sid.ir/paper/532325/en

IEEE: Copy

F. VAHABZADEH, A. NIKNEJADI, B. BONAKDARPOUR, and H. GHAFOURIAN, “BATCH BIOLEACHING OF A GOLD - BEARING PYRITE OF MOTAH MINE - ISPHAHAN BY THE MIXED CHEMOLITHOTROPHIC BACTERIAL CULTURES ,” AMIRKABIR, vol. 13, no. 49, pp. 46–55, 2002, [Online]. Available: https://sid.ir/paper/532325/en

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