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Title

ZINC BIOLEACHING OF SPHALERITE LOW-GRADE MINERAL ORE BY MESOPHILIC AND THERMOPHILIC BACTERIA IN AN AIRLIFT BIOREACTOR

Year: 1387
COI: NICEC12_020
Language: EnglishView: 1,650
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Authors

M soleimani - Department of Chemical and Petroleum Engineering Sharif Univerisity of Technology, Tehran, Iran.
S Hosseini - Department of Chemical and Petroleum Engineering Sharif Univerisity of Technology, Tehran, Iran
R Roostaazad - Department of Chemical and Petroleum Engineering Sharif Univerisity of Technology, Tehran, Iran.
S.M Mousavi - Department of Chemical and Petroleum Engineering Sharif Univerisity of Technology, Tehran, Iran-Department of Chemical Technology, Lappeenranta University of Technology, Lappeenranta, Finland

Abstract:

A thermophilic iron oxidizing bacterium, Sulfobacillus, has been isolated (60  C) from the Kooshk lead and zinc mine near the city of Yazd in central Iran. In addition, a mesophilic iron oxidizing bacterium, Acidithiobacillus ferrooxidans, has been adapted (33  C) to high amounts of zinc. Effects of some variable parameters such as solid concentration, temperature, pH and Eh on the bioleaching of sphalerite low-grade mineral ore from Kooshk lead and zinc mine were investigated. Bioleaching experiments were carried out in two batch airlift bioreactor with a recycling stream. The results indicate that the efficiency of zinc extraction is dependent on all the variables studied for both microorganisms. Maximum zinc recovery was achieved using a thermophilic culture. Zinc dissolution reached 91.4% with Sulfobacillus and 87% with Acidithiobacillus ferrooxidans at 10% w/v pulp density , after 9 days.

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This Paper COI Code is NICEC12_020. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

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soleimani, M and Hosseini, S and Roostaazad, R and Mousavi, S.M,1387,ZINC BIOLEACHING OF SPHALERITE LOW-GRADE MINERAL ORE BY MESOPHILIC AND THERMOPHILIC BACTERIA IN AN AIRLIFT BIOREACTOR,12th National Iranian Chemical Engineering Congress,Tabriz,https://civilica.com/doc/57715

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