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Bioleaching of a polymetallic sulphide mineral by native strains of Leptospirillum ferrooxidans from Patagonia Argentina

Paper ID Volume ID Publish Year Pages File Format Full-Text
35741 45104 2008 6 PDF Available
Title
Bioleaching of a polymetallic sulphide mineral by native strains of Leptospirillum ferrooxidans from Patagonia Argentina
Abstract

Two strains of Leptospirillum ferrooxidans were isolated from samples taken from La Silvita polymetallic sulphide mine, Neuquen, Argentina. Isolates were identified by 16S rRNA gene restriction enzyme analysis. The specific growth rate (μ) at different temperatures and pH values were examined. The potential of two isolates to assist the leaching process using a mineral ore from the same mine was evaluated. The tests were carried out in shake flask at 1% (w/v) pulp density. The main sulphides found in the mineralogical composition of La Silvita ore were: sphalerite, galena, pyrite and chalcopyrite.Zinc and copper recoveries with a native isolate were 100% in 20 days and 12 days, respectively. Iron solubilization was 42% after 33 days of operation. These values were greater than those obtained using a laboratory reference strain, L. ferrooxidans DSMZ 2705, or abiotic conditions.

Keywords
Leptospirillum; Isolation; Bioleaching; Polymetallic sulphide mineral
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Bioleaching of a polymetallic sulphide mineral by native strains of Leptospirillum ferrooxidans from Patagonia Argentina
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 43, Issue 4, April 2008, Pages 445–450
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
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Full-text PDF Download
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Any Questions? feel free to contact us