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  • Using bacteria to mine precious metals | Results In Brief ...

    Using bacteria to mine precious metals. Black shale ores are rich in valuable precious metals including copper, nickel, silver, gold and platinum. EU-funded researchers used biotechnology to successfully mine metals from these difficult sites with minimal environmental impact.

  • Bacterial consortium for copper extraction from sulphide ...

    ABSTRACT. The mining industry is looking forward for bacterial consortia for economic extraction of copper from low-grade ores. The main objective was to determine an optimal bacterial consortium from several bacterial strains to obtain copper from the leach of chalcopyrite.

  • Bioleaching of Copper-Containing Electroplating Sludge ...

    May 01, 2021· In this study, we sought to find an efficient metal-extraction strategy. Thus, a mixed bacterial consortium and sulfuric acid were used for the leaching of copper form Copper-Containing Electroplating Sludge, and the leaching performance was compared with each other.

  • Sustainable copper extraction from mixed chalcopyrite ...

    Oct 01, 2019· In fact, an alternative copper extraction route from mixed sulphide ores, chalcopyrite and chalcocite using mesophilic biomass consortium at 33.3 °C and ferric leaching process were attempted. Bioleaching experiments were settled with a fraction size of 75+53 µm. Bacteria were used as the catalyst. A copper yield of 65.50% was obtained.

  • Degradation of Chrysene by Enriched Bacterial Consortium

    Jun 26, 2018· Chrysene is a high molecular weight (HMW), polycyclic aromatic hydrocarbon (PAH) known for its recalcitrance and carcinogenic properties and sparsely soluble (0.003 mg/L) in aqueous medium. Due to these refractory properties, bioavailability of chrysene is very low and therefore is persistence in the environment escaping the metabolism by microorganisms. However, few bacterial

  • Biorecovery of copper from converter slags: Slags ...

    Abstract This paper studies the ferric sulphate leaching of converter slag (9% Cu) in order to recover Cu through a process in which bacteria regenerate the leaching agent. For this purpose, the effect of variables such as pulp density, ferric concentration, temperature and size particle have been investigated. As the Cu extraction is limited by the physical refractoriness of slag, a mild ...

  • Bioleaching of copper- and zinc-bearing ore using ...

    Jul 19, 2018· Recently, consortia of acidophilic bacteria such as At. ferrooxidans, At. thiooxidans, and Leptospirillum ferrooxidans have shown auspicious results for copper extraction from low-grade ores and a favored consortium for large-scale heap bioleaching process (Panda et al. 2012, 2015). It is strongly believed that the indigenous microorganisms ...

  • Bacterial consortium for copper extraction from sulphide ...

    The mining industry is looking forward for bacterial consortia for economic extraction of copper from low-grade ores. The main objective was to determine an optimal bacterial consortium from several bacterial strains to obtain copper from the leach of chalcopyrite.

  • PURIFICATION PROTOCOLS - huji.ac.il

    Dec 14, 2017· Structural Genomics Consortium Protein production and purification. Nature ... Cobalt ChroMatrix, Fast Flow and Nickel, Zinc, Cobalt, Copper and Metal Free Agaroses, Gravity Flow MERCK-NOVAGEN : Metal Chelate ... New Methods for Enhancing Protein Expression and Purification in Bacteria ...

  • Comparison of three different bioleaching systems for Li ...

    Sep 03, 2020· Medium pH prior bacteria addition was adjusted to 3 by 10 M H 2 SO 4. 10 ml of adapted bacterial consortium was added. After pH dropped to 1.5 due to production of sulphuric acid, crushed ...

  • (PDF) Bacterial consortium for copper extraction from ...

    The objective of this study was isolate a bacterial copper extraction was performed a chemical analysis consortium present in mineral composed mainly of chalco- with an atomic absorption equipment (Perkin Elmer pyrite-bornite and determine which of this isolated consor- model 3110). tiums was best suited for the extraction of copper from ...

  • Bacterial consortium for copper extraction from sulphide ...

    Oct 30, 2013· Regarding this, the bacterial consortium that achieved the greater extraction of copper from sulphulretted ore (Figure 2), was the one that consisted of consortia At. ferrooxidans with At. thiooxidans, making a 70% extraction of copper in the final test. The consortium presented a statistically significant difference from the rest of the tests.

  • Biogenic Synthesis of Copper Nanoparticles Using Bacterial ...

    Herein, an original and efficient route for the microbial synthesis of copper NPs using bacterial strains newly isolated from an Antarctic consortium is described. UV-visible spectra of the NPs showed a maximum absorbance in the range of 380385 nm. Transmission electron microscopy analysis showed that these NPs are all monodispersed ...

  • Screening for Heavy Metal Bioaccumulating Bacteria from

    Copper is widely used metal in electrical and plumbing industries, agriculture, fungicides, tanning, ceramic and ... The bacteria were grown in 0.1% yeast extract water containing the individual heavy metals. The concentration of Lead (II) acetate ,Cupric Sulphate and ... A consortium of algae was

  • The Bioleaching Potential of a Bacterial Consortium

    The consortium had a greater capacity to resist copper, arsenic and chloride ion compared to previously described biomining strains. Specialization and particular components in these bacteria provided the consortium a greater ability to bioleach copper sulfide ores.

  • Microbial technology for metal recovery from e-waste ...

    May 26, 2018· The overall reaction is known as Elsners equation (Eq. 9). In case of PCBs, before giving the cyanogenic bacterial treatment it is essential to treat PCBs with iron and sulphur bacteria for removal of copper and other metals, otherwise these metals interfere in the process of gold extractions by consuming the HCN.

  • Heavy Metal Resistance Strategies of Acidophilic Bacteria ...

    Copper-resistance determinants were searched in the genomes from A. caldus strains SM-1 and ATCC 51756 by making a BLAST search using the sequences of copper-resistance related proteins previously reported in A. ferrooxidans ATCC 23270 (Navarro et al., 2009) and 53993 (Orellana and Jerez, 2011): CusCFBA Aƒ, CopA Aƒ, CopB Aƒ and CopC Aƒ 'or in E. coli (EcCueO) and B. subtilis (BsCopZ).

  • Bacterial consortium for copper extraction from sulphide ...

    in Figure 2, the consortium achieved a good extraction of copper, being in second place. There is a difficulty in the extraction of copper from different bacterial consortium, due to the large amount of chalcopyrite present in the min-eral studied (70% total Cu). Of

  • Innovations in Copper: Mining & Extraction: Producing ...

    Bioleaching is the extraction of a metal from sulfide ores or concentrates using materials found native to the environment; namely, water, air and microorganisms. In other words, bioleaching is the commercialization of the ability of certain bacteria and archaea, found in nature, to catalyze the oxidation of sulfide minerals.

  • Bacterial consortium for copper extraction from sulphide ...

    Regarding this, the bacterial consortium that achieved the greater extraction of copper from sulphulretted ore (Figure 2), was the one that consisted of consortia At. ferrooxidans with At. thiooxidans, making a 70% extraction of copper in the final test. The consortium presented a statistically significant difference from the rest of the tests.

  • Researchers show how bacteria convert toxic copper ions to ...

    Apr 25, 2021· The microbes utilize a unique biological pathway with an array of proteins that can extract copper (II) (Cu 2+) and convert it into single-atom zero-valent copper (Cu 0). The aim of the microbes is to create a less toxic environment for themselves by converting the ionic copper into single-atom copper, but at the same time they make something ...

  • Recovery of valuable metals from polymetallic mine ...

    May 28, 2018· The extent of extraction of metals from the samples of concentrated tailings by natural microbial consortium reached 4155% and 5373% for copper and zinc, respectively. Metal leaching efficiencies of pure culture Leptospirillum ferrooxidans Teg were higher, namely 4793% and 7381% for copper and zinc, respectively.

  • Isolating metal-tolerant bacteria capable of removing ...

    & Smith (1998) have shown that 90% of the copper, 80% chromium, and arsenic can be removed from CCA-treated chips. Still, a designer consortium of heterotrophic bacteria is desirable to remove efficiently 90% to of the copper, arsenic, and chromium. One of the objectives of this survey was to identify bacteria suitable for inclusion in a

  • Researchers show how bacteria convert toxic copper ions to ...

    Apr 25, 2021· The microbes utilize a unique biological pathway with an array of proteins that can extract copper (II) (Cu 2+) and convert it into single-atom zero-valent copper (Cu 0). The aim of the microbes is to create a less toxic environment for themselves by converting the ionic copper into single-atom copper

  • Bio-Extraction of Metals as Secondary Resources from E ...

    Bioleaching of copper from waste printed circuit boards by bacterial consortium enriched from acid mine drainage. Journal of Hazardous Materials 184 (13), 812818. DOI: 10.1016/j.jhazmat.2010.08.113

  • Bacteria isolated from amoebae/bacteria consortium (Patent ...

    May 30, 1995· @article{osti_63440, title = {Bacteria isolated from amoebae/bacteria consortium}, author = {Tyndall, R L}, abstractNote = {New protozoan derived microbial consortia and method for their isolation are provided. Consortia and bacteria isolated therefrom are useful for treating wastes such as trichloroethylene and trinitrotoluene. Consortia, bacteria isolated therefrom, and dispersants isolated ...

  • Copper-Binding Characteristics of Exopolymers from ...

    bacterium. Saturation of copper-binding sites occurred at lower dissolved copper concentrations after removal of DNAand protein fromthe capsule matrix (Fig. 1). Alinear relationship was obtained from a Langmuir plot of the copper-binding capacity of crude, partially purified, and highly purified exopolysaccharide preparations at copper

  • Copper mining bacteria: Converting toxic copper ions into ...

    Apr 01, 2021· The chemical synthesis of monoatomic metallic copper is unfavorable and requires inert or reductive conditions and the use of toxic reagents. Here, we report the environmental extraction and conversion of CuSO4 ions into single-atom zero-valent copper (Cu) by a copper-resistant bacterium isolated from a copper mine in Brazil. Furthermore, the biosynthetic mechanism of Cu production is

  • Microbes and mineral recovery: Bioleaching of copper, gold ...

    Bioleaching is the extraction of metals from their ores through the ... bacteria and archaea, found in nature, to catalyze the oxidation of sulfide minerals. ... A consortium of microorganisms namely Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans,

  • Bacteria isolated from amoebae/bacteria consortium (Patent ...

    Jan 01, 1995· @article{osti_869906, title = {Bacteria isolated from amoebae/bacteria consortium}, author = {Tyndall, Richard L}, abstractNote = {New protozoan derived microbial consortia and method for their isolation are provided. Consortia and bacteria isolated therefrom are useful for treating wastes such as trichloroethylene and trinitrotoluene. Consortia, bacteria isolated therefrom, and dispersants ...

  • Fusarium oxysporum and its bacterial consortium promote ...

    May 01, 2011· Abstract. Fusarium oxysporum MSA 35 [wild-type (WT) strain] is a nonpathogenic Fusarium strain, which exhibits antagonistic activity to plant pathogenic F. oxysporum isolates. The fungus lives in association with a consortium of ectosymbiotic bacteria. The WT strain, when cured of the bacterial symbionts [the cured (CU) form], is pathogenic, causing wilt symptoms similar to those

  • E. Romo | Semantic Scholar

    Dec 01, 2012· The mining industry is looking forward for bacterial consortia for economic extraction of copper from low-grade ores. The main objective was to determine an optimal bacterial consortium from several Expand. 12. 1. PDF. View PDF. Save. Alert. Cite.

  • Isolation and identification of a bacterium with high ...

    Feb 16, 2010· A bacterial strain (DE2008) was isolated from a consortium of microorganisms living in the microbial mats of the Ebro Delta with the ability to grow under conditions of high concentrations of lead and copper. Strain DE2008 has been characterized by microscopic and metabolic techniques and identified by sequencing of PCR-amplified 16S rRNA gene fragments as Micrococcus luteus.

  • Biomining - Wikipedia

    Biomining is a technique of extracting metals from ores and other solid materials typically using prokaryotes, fungi or plants (phytoextraction also known as phytomining or biomining). These organisms secrete different organic compounds that chelate metals from the environment and bring it back to the cell where they are typically used to coordinate electrons.

  • Integrated bioleaching of copper metal from waste printed ...

    Sep 28, 2016· Ilyas et al. investigated that moderately thermophilic bacterial consortium (Sulfobacillus thermosulfidooxidans and Thermoplasma acidophilum) achieved 85 % Cu extraction from e-scrap (electronic scrap) in 18 days, with the addition of FeS 2 + S o (1 %).

  • Microbial copper resistance: importance in biohydrometallurgy

    search of those bacteria with extreme metal resistance to improve the extraction processes used by the biomining companies. Introduction Biomining is used to enhance the recovery of metals from ores such as sulfide minerals. Bioleaching solubilizes the metal of interest by biological catalysis as in the case of copper.

  • Bacterial consortium for copper extraction from sulphide ...

    Bacterial consortium for copper extraction from sulphide ore consisting mainly of chalcopyrite By E. Romo, D.F. Weinacker, A.B. Zepeda, C.A. Figueroa, P. Chavez-Crooker and J.G. Farias Get PDF (0 )

  • Biotransformation of Organic-Rich Copper-Bearing Black ...

    The role of indigenous microorganisms in the biotransformation of refractory organic-rich copper-bearing black shale ore (Kupferschiefer) was confirmed in laboratory experiments. The persistent shales organic matter was utilized by a mixture of bacterial strains as the sole carbon and energy source, and bacterial growth was accompanied by chemical and structural changes of black shale. The ...