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A two-stage technology for bacterial and chemical leaching of copper-zinc raw materials by Fe3+ ions with their subsequent regeneration by chemolithotrophic bacteria

A two-stage technology for bacterial and chemical leaching of copper-zinc raw materials by Fe3+... A two-stage technology for bacterial and chemical leaching of nonferrous metals in a specifically designed laboratory unit has been proposed. At the first stage of leaching, ferric iron formed during the second stage of oxidation of Fe2+ ions by mesophilic chemolithotrophic microorganisms was used. The optimal parameters of the first stage of the process (flow rate, temperature, and the process duration) were 2 l/h, 75°C, and 24 h, respectively. The results of testing of the two-stage technology for leaching copper-zinc raw materials indicated that the depth of zinc and copper leaching can be increased from 70 to 93% and from 40 to 58.8%, respectively, and the process duration can be reduced from 120 to 24 h as compared to the commonly used one-stage technology. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Biochemistry and Microbiology Springer Journals

A two-stage technology for bacterial and chemical leaching of copper-zinc raw materials by Fe3+ ions with their subsequent regeneration by chemolithotrophic bacteria

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References (3)

Publisher
Springer Journals
Copyright
Copyright © 2009 by MAIK Nauka
Subject
Life Sciences; Medical Microbiology ; Microbiology ; Biochemistry, general
ISSN
0003-6838
eISSN
1608-3024
DOI
10.1134/S0003683809010104
Publisher site
See Article on Publisher Site

Abstract

A two-stage technology for bacterial and chemical leaching of nonferrous metals in a specifically designed laboratory unit has been proposed. At the first stage of leaching, ferric iron formed during the second stage of oxidation of Fe2+ ions by mesophilic chemolithotrophic microorganisms was used. The optimal parameters of the first stage of the process (flow rate, temperature, and the process duration) were 2 l/h, 75°C, and 24 h, respectively. The results of testing of the two-stage technology for leaching copper-zinc raw materials indicated that the depth of zinc and copper leaching can be increased from 70 to 93% and from 40 to 58.8%, respectively, and the process duration can be reduced from 120 to 24 h as compared to the commonly used one-stage technology.

Journal

Applied Biochemistry and MicrobiologySpringer Journals

Published: Jan 7, 2009

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