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Mechanisms of Bacterial Leaching in Metal Recovery

Year 2006, Volume 45, Issue 4, 19 - 27, 01.12.2006

Abstract

Bacterial leaching of minerals is a simple, effective and environmental by benign technology in the treatment of sulphidic ores. This method has been successfully applied for the recovery of copper, gold and uranium in commercial scale for the past 25 years. Efficiency and cost-effectiveness of the bacterial leaching process depend mainly on the activity of bacteria and mineralogical and chemical composition of the ores. Bacterial leaching is based on the activity of mesophilic iron- and/or sulphuroxidizing bacteria, notably Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans and Leptospirillum ferrooxidans. These bacteria oxidize metal compounds to water soluble metal sulphates by a series of biological and chemical oxidation reactions occurring in leaching medium. After the isolation of above bacteria from acidic mine drainage waters, two oxidation mechanisms (direct and indirect bacterial leaching) have been discussed as related to oxidation/leaching of sulphidic ores in leaching systems. Fully understanding the bacterial leaching mechanisms of sulphidic ores improves the design and operation of bacterial leaching plants. In this article, the importance of various leaching mechanisms employed for metal recovery and their application aspects are critically reviewed with emphasis on copper, lead, zinc and nickel minerals.

METAL KAZANIMINDA BAKTERİYEL LİÇ MEKANİZMALARI

Year 2006, Volume 45, Issue 4, 19 - 27, 01.12.2006

Abstract

Minerallerin bakteriyel liçi, sülfürlü cevherlerinin işlenmesinde basit, etkili ve çevresel açıdan uyumlu bir teknolojidir. Bu yöntem, bakır, altın ve uranyumun kazanımı için endüstriyel ölçekte son 25 yıldan bu yana başarıyla uygulanmaktadır. Bakteriyel liç prosesinin ekonomikliği ve etkinliği büyük ölçüde bakterilerin aktivitesine, cevherin mineralojik ve kimyasal bileşimine bağlıdır. Bakteriyel liç, özellikle Acidithiobacillus ferrooxidans, Leptospirillum ferrooxidans ve Acidithiobacillus thiooxidans türü bakterilerin faaliyetlerine dayanmaktadır. Bu tür bakteriler, liç ortamında gerçekleşen bir seri biyolojik ve kimyasal oksitleme tepkimeleri ile metal bileşiklerini suda çözünen metal sülfatlara dönüştürmektedirler. Bu bakterilerin asidik maden sularından izole edilmesinden bu yana, liç sistemlerinde sülfürlü minerallerin oksitlenmesi/liçi ile ilgili olarak iki çözünme mekanizması (doğrudan ve dolaylı bakteriyel liç mekanizması) tartışılmaktadır. Sülfürlü cevherlerin bakteriyel liç mekanizmalarının tam olarak anlaşılması, bakteriyel liç tesislerinin tasarımını ve işletilmesini önemli şekilde geliştirmektedir. Bu makalede, metallerin kazanımında farklı tipteki liç mekanizmalarının önemi ve uygulama hususları özellikle bakır, kurşun, çinko ve nikel mineralleri için incelenmiştir

Details

Other ID JA93ZH84CT
Journal Section Research Article
Authors

Ata AKÇIL This is me


Hasan ÇİFTÇİ This is me

Publication Date December 1, 2006
Submission Date December 1, 2006
Acceptance Date
Published in Issue Year 2006, Volume 45Issue 4

Cite

Bibtex @ { madencilik361205, journal = {Scientific Mining Journal}, issn = {2564-7024}, eissn = {2587-2613}, address = {Selanik Cad. No: 19/4 06650 Kızılay-Çankaya / ANKARA - TURKEY}, publisher = {Chamber of Mining Engineers of Turkey}, year = {2006}, volume = {45}, number = {4}, pages = {19 - 27}, title = {Mechanisms of Bacterial Leaching in Metal Recovery}, key = {cite}, author = {Akçıl, Ata and Çiftçi, Hasan} }
APA Akçıl, A. & Çiftçi, H. (2006). Mechanisms of Bacterial Leaching in Metal Recovery . Scientific Mining Journal , 45 (4) , 19-27 . Retrieved from http://www.mining.org.tr/en/pub/issue/32497/361205
MLA Akçıl, A. , Çiftçi, H. "Mechanisms of Bacterial Leaching in Metal Recovery" . Scientific Mining Journal 45 (2006 ): 19-27 <http://www.mining.org.tr/en/pub/issue/32497/361205>
Chicago Akçıl, A. , Çiftçi, H. "Mechanisms of Bacterial Leaching in Metal Recovery". Scientific Mining Journal 45 (2006 ): 19-27
RIS TY - JOUR T1 - Mechanisms of Bacterial Leaching in Metal Recovery AU - AtaAkçıl, HasanÇiftçi Y1 - 2006 PY - 2006 N1 - DO - T2 - Scientific Mining Journal JF - Journal JO - JOR SP - 19 EP - 27 VL - 45 IS - 4 SN - 2564-7024-2587-2613 M3 - UR - Y2 - 2023 ER -
EndNote %0 Scientific Mining Journal Mechanisms of Bacterial Leaching in Metal Recovery %A Ata Akçıl , Hasan Çiftçi %T Mechanisms of Bacterial Leaching in Metal Recovery %D 2006 %J Scientific Mining Journal %P 2564-7024-2587-2613 %V 45 %N 4 %R %U
ISNAD Akçıl, Ata , Çiftçi, Hasan . "Mechanisms of Bacterial Leaching in Metal Recovery". Scientific Mining Journal 45 / 4 (December 2006): 19-27 .
AMA Akçıl A. , Çiftçi H. Mechanisms of Bacterial Leaching in Metal Recovery. Mining. 2006; 45(4): 19-27.
Vancouver Akçıl A. , Çiftçi H. Mechanisms of Bacterial Leaching in Metal Recovery. Scientific Mining Journal. 2006; 45(4): 19-27.
IEEE A. Akçıl and H. Çiftçi , "Mechanisms of Bacterial Leaching in Metal Recovery", Scientific Mining Journal, vol. 45, no. 4, pp. 19-27, Dec. 2006

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