Bioleaching and mineral biotechnology

Tuovinen, Olli H.; Fry, Ilona J.

doi:10.1016/0958-1669(93)90106-7

Cited by 14 publications

(5 citation statements)

References 85 publications

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“…In the case of CN pit lake, Legionella could be hosted by Chlamydomonas and Ochromonas . Likewise, Rhodococcus species have also been detected in mining areas associated with organic sulfur bioleaching processes [61], [62].…”

Section: Discussionmentioning

confidence: 99%

Microbial Diversity and Its Relationship to Physicochemical Characteristics of the Water in Two Extreme Acidic Pit Lakes from the Iberian Pyrite Belt (SW Spain)

et al. 2013

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The Iberian Pyrite Belt (IPB) hosts one of the world’s largest accumulations of acidic mine wastes and pit lakes. The mineralogical and textural characteristics of the IPB ores have favored the oxidation and dissolution of metallic sulfides, mainly pyrite, and the subsequent formation of acidic mining drainages. This work reports the physical properties, hydrogeochemical characteristics, and microbial diversity of two pit lakes located in the IPB. Both pit lakes are acidic and showed high concentrations of sulfate and dissolved metals. Concentrations of sulfate and heavy metals were higher in the Nuestra Señora del Carmen lake (NSC) by one order of magnitude than in the Concepción (CN) lake. The hydrochemical characteristics of NSC were typical of acid mine waters and can be compared with other acidic environments. When compared to other IPB acidic pit lakes, the superficial water of CN is more diluted than that of any of the others due, probably, to the strong influence of runoff water. Both pit lakes showed chemical and thermal stratification with well defined chemoclines. One particular characteristic of NSC is that it has developed a chemocline very close to the surface (2 m depth). Microbial community composition of the water column was analyzed by 16S and 18S rRNA gene cloning and sequencing. The microorganisms detected in NSC were characteristic of acid mine drainage (AMD), including iron oxidizing bacteria (Leptospirillum, Acidithiobacillus ferrooxidans) and facultative iron reducing bacteria and archaea (Acidithiobacillus ferrooxidans, Acidiphilium, Actinobacteria, Acidimicrobiales, Ferroplasma) detected in the bottom layer. Diversity in CN was higher than in NSC. Microorganisms known from AMD systems (Acidiphilium, Acidobacteria and Ferrovum) and microorganisms never reported from AMD systems were identified. Taking into consideration the hydrochemical characteristics of these pit lakes and the spatial distribution of the identified microorganisms, a model explaining their geomicrobiology is advanced.

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Section: Discussionmentioning

confidence: 99%

Microbial Diversity and Its Relationship to Physicochemical Characteristics of the Water in Two Extreme Acidic Pit Lakes from the Iberian Pyrite Belt (SW Spain)

et al. 2013

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“…Bacteria play a crucial role in copper bioleaching [106]. The physiological and phylogenetic biodiversity of acidophilic microorganisms are prominent and less definite [107].…”

Section: Isolation Identification and Enrichment Of Bacteriamentioning

confidence: 99%

Copper Bioleaching in China: Review and Prospect

et al. 2018

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The commercial application of copper bioleaching, an environmentally-friendly approach for low-grade and secondary mineral resources recycling, has increased worldwide since the 2000s. As the world's second-largest economic entity and the largest developing country, China has the largest demand for metal resources, significantly advancing the theory and industrial technology of copper bioleaching. This paper reviews the exploration and application of copper bioleaching in China. Two typical bioleaching applications and technological processes, bioheap leaching at the Zijinshan Copper Mine and bioheap leaching at the Dexing Copper Mine, are introduced. The considerable research completed by researchers is summarized, especially focusing on the isolation and identification of leaching bacteria, the bioleaching mechanism and interface reactions, multistage percolation behavior, bioleaching system reconstruction, the multiphysics coupled model, and enhanced copper bioleaching from waste printed circuit boards (WPCBs). Based on this investigation in China, key trends and prospects in copper bioleaching-such as efficiency improvement, environmental protection, and improved technology applications-are proposed.

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“…Microorganisms potentially useful in the removal of sulfur from oil shales are also relevant to coal desulfurization and mineral beneficiation processes which employ bacterial oxidation of sulfide minerals and biologically produced lixiviants for metal Ileaching [2].…”

Section: Fe-sulfidesmentioning

confidence: 99%

Biological Leaching of Shales – A Review

Tasa¹,

Tuovinen²

1998

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Sulfur removal from oil shales through bioprocessing can substantially reduce SO; emissions from thermal power plants that combust oil shales for energy production. Iron sulfides constitute the most significant inorganic sulfur fraction in shales. There are several Fe-and S-oxidizing microorganisms that have potential for oxidizing iron sulfides 10 soluble products in acid sulfate-containing solutions.Environmental factors that influence the activities of these organisms are discussed. The organic sulfur compounds in shale matrix are variable and complex. Microbiological transformations of the organic sulfur fraction are poorly understood and it is not clear whether they are amenable to shale bioprocessing.The paper summarizes previously published experimental studies where shales were contacted with bacteria for iron sulfide oxidation. Shales constitute a complex system of study because they contain several phases such as clay minerals, sulfides, organic matter, and carbonates that interact with each other

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Bioleaching and mineral biotechnology

Cited by 14 publications

References 85 publications

Microbial Diversity and Its Relationship to Physicochemical Characteristics of the Water in Two Extreme Acidic Pit Lakes from the Iberian Pyrite Belt (SW Spain)

Microbial Diversity and Its Relationship to Physicochemical Characteristics of the Water in Two Extreme Acidic Pit Lakes from the Iberian Pyrite Belt (SW Spain)

Copper Bioleaching in China: Review and Prospect

Biological Leaching of Shales – A Review

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