Selective Copper Bioleaching by Pure and Mixed Cultures of Alkaliphilic Bacteria Isolated from a Fly Ash Landfill Site

Ramanathan, Thulasya; Ting, Yen‐Peng

doi:10.1007/s11270-015-2641-x

Cited by 15 publications

(4 citation statements)

References 29 publications

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“…The differences in results are largely attributed to the quality and composition of the refectory ores [1,33,34]. Nonetheless, it is generally believed that the acidic environment (i.e., low pH 1.2 to 1.5 and high redox potential of 651 mV to 705 mV) facilitates copper dissolution from the chalcocite mineral [35]. The oxidative leaching process is sensitive to redox potential, and higher copper dissolution rate has been achieved at redox potential of 450-650 mV [36].…”

Section: Bioleaching Of Copper Orementioning

confidence: 99%

Catalytic Efficiency of <i>Acidithiobacillus ferrooxidans</i> for Bioleaching Copper from Chalcocite Containing Sulfide Ore from Reko Diq Deposits

Furqan¹,

Farooq²,

Liaquat³

et al. 2020

Pol. J. Environ. Stud.

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Bioleaching of low-grade secondary copper sulphide ores using different microbial strains is an ecologically safe technology for the recovery of metals in the mineral and mining industry. The purpose of the present study was to analyze the mineral contents of Reko Diq deposits and to assess the dissolution of copper from sulfide ore by an indigenously isolated strain of acidophilic iron-and sulfur-oxidizing bacterium (BSTFe-2) in shake flask experiments. X-ray diffraction (XRD) analysis of the ore sample suggested that it contained 0.81% Cu on dry matter basis and contained chalcocite (Cu 2 S) and covellite (CuS) as main copper minerals. Pyrite (FeS 2 ) was also present as a sulfide mineral. The other minerals detected in the ore matrix were muscovite (a di-octahedral mica mineral), quartz, feldspar (anorthite) and calcite. Quartz (SiO 2 ) was the main silicate mineral present in the sample. Calcite (CaCO 3 ) was found as the main acid-consuming gangue mineral. We observed that about 80-90% of the total Cu content present in the ore matrix was solubilized during 30 days of the leaching process mediated by Acidithiobacillus ferrooxidans at 30ºC. Copper dissolution from ore was found to be directly related to the reaction pH (1.5-1.9). The leaching data obtained from the pulp densities (5, 10 and 20% wt/

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Section: Bioleaching Of Copper Orementioning

confidence: 99%

Catalytic Efficiency of <i>Acidithiobacillus ferrooxidans</i> for Bioleaching Copper from Chalcocite Containing Sulfide Ore from Reko Diq Deposits

Furqan¹,

Farooq²,

Liaquat³

et al. 2020

Pol. J. Environ. Stud.

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“…Alkaliphilic zinc solubilizing microbes Agromyces aurantiacus, Alkalibacterium sp., A. pelagium, and B. foraminis were isolated from fly ash landfill site [73]. Alkaliphiles B. marisflavi, and haloalkaliphile Chromohalobacter israelensis were isolated from the Batim salt pan, were able to solubilize phosphate at high salt concentrations and pH [74].…”

Section: Alkaliphilesmentioning

confidence: 99%

Biodiversity, mechanisms, and potential biotechnological applications of minerals solubilizing extremophilic microbes: A review

Devi,

Kaur,

Negi

et al. 2024

J App Biol Biotech

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The earth’s surface consists of arid, semi-arid, and hyper-arid lands, where life is profoundly challenged by harsh conditions such as temperature fluctuations, water scarcity, high levels of solar radiations, and soil salinity. The harsh environmental conditions pose serious consequences on plant survival, growth, and productivity accessibility of nutrients reduces. To cope with the harsh environments and increase plant productivity, an extremophilic microbe has attracted agriculturists and environmentalists. The extremophilic microbes, adapted to extreme environmental conditions, offer an unexploited reservoir for biofertilizers, which could provide various forms of nutrients and alleviate the stress caused by the abiotic factors in an environment-friendly manner. Worldwide, minerals solubilizing extremophilic microbes are distributed in various hotspots and belong to three domains of life including, archaea, bacteria, and eukarya. The minerals solubilizing extremophilic microbes belong to diverse phyla, namely, Ascomycota, Actinobacteria, Basidiomycota, Bacteroidetes, Crenarchaeota, Deinococcus-Thermus, Euryarchaeota, Firmicutes, and Proteobacteria. Mineral solubilizing extremophilic microbes achieve the mineral solubilization of phosphorus, potassium, zinc, and selenium by secreting special compounds such as organic acid, exopolysaccharides, and different enzymes. Consequently, extremophilic microbes are becoming increasingly important in agriculture, industries and environmental biotechnology as well, paving the way for novel sequencing technologies and “metaomics” methods, including metagenomics, metatranscriptomics, and metaproteomics. The extremophilic microbial diversity and their biotechnological application in agriculture and industrial applications will be a milestone for future needs. The present review deals with biodiversity, mechanisms and potential biotechnological applications of minerals solubilizing extremophilic microbes.

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“…Compared with the traditional smelting method, bio-metallurgy has the advantages of low cost, low energy consumption, wide utilization of resources, simple equipment and simple operation, and can effectively recover low grade sulfide ore and has become more and more attention [1][2][3][4][5][6] . Bio-heap leaching is the most widely used process technology for bio-metallurgy.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Microbial Community in Heap Bioleaching of Low-Grade Copper Sulfide Ores

Shang

Wen

et al. 2018

KEM

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High-throughput sequencing technology also known as "next generation" sequencing technology, compared with the traditional sequencing method has the characteristics of fast speed, high flux, low cost. In recent years the technology in the detection of microbial diversity has been fully applied. In this study, the microbial community of ore heap in different area and different depth was studied by using this method. The results showed the bio - heap leaching of low - grade secondary copper sulfide ore in Zijinshan from China could effectively recover the copper in the ore. The number of microorganisms in the center was significantly larger than that on the edge of ore heap, and as the depth increases in the heap, the number of microorganisms decreases. The dominant bacteria in the ore heap center was Acidithiobacillus ferrooxidans, in addition there were also some Sulfobacillus thermosulfidooxidans, Ferroplasma cupricumulans, Acidithiobacillus caldus and a small amount of Leptospirillum ferriphilum in the center of the ore heap. Unlike the ore heap center, Sulfobacillus thermosulfidooxidans was the main species on the edge of the ore heap, moreover Acidithiobacillus ferrooxidans, Ferroplasma cupricumulans, Acidithiobacillus caldus and a small amount of Leptospirillum ferriphilum were found on the edge of the ore heap. In addition, some heterotrophic bacteria such as Pseudomonas, Serratia, Sediminibacterium, Stenotrophomonas, Brevundimonas and Variovorax were found both in the center and the edge of the sample, these heterotrophic bacteria may be beneficial for the leaching of valuable metals.

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Selective Copper Bioleaching by Pure and Mixed Cultures of Alkaliphilic Bacteria Isolated from a Fly Ash Landfill Site

Cited by 15 publications

References 29 publications

Catalytic Efficiency of <i>Acidithiobacillus ferrooxidans</i> for Bioleaching Copper from Chalcocite Containing Sulfide Ore from Reko Diq Deposits

Catalytic Efficiency of <i>Acidithiobacillus ferrooxidans</i> for Bioleaching Copper from Chalcocite Containing Sulfide Ore from Reko Diq Deposits

Biodiversity, mechanisms, and potential biotechnological applications of minerals solubilizing extremophilic microbes: A review

Analysis of Microbial Community in Heap Bioleaching of Low-Grade Copper Sulfide Ores

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