Abstract. The objectives of this study were to evaluate the solubility of copper in waste printed circuit boards (PCBs) by bacterial consortium enriched from natural acid mine drainage, and to determine optimum conditions of bioleaching copper from PCBs. The results indicated that the extraction of copper was mainly accomplished indirectly ...

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 380–385 nm. Transmission electron microscopy analysis showed that these NPs are all monodispersed ...

Bioleaching of copper from waste printed circuit boards by bacterial consortium enriched from acid mine drainage. Journal of Hazardous Materials 184 (1–3), 812–818. DOI: 10.1016/j.jhazmat.2010.08.113

The Method of Extracting Copper and Gold by Bacterial Leaching. and therefore require separate attention. Prior to leaching occurring, the bacteriaα. are added to the copper ore. The bacteria in the acidic leaching. containing Cu2+, Fe2+, Fe3+ and SO42- ions. The acidic solution. provides the optimum pH for the bacteria to work at.

Three high copper-resistant bacteria used for mixing bacterial consortia were Acinetobacter sp. IrC1, Acinetobacter sp. IrC2, and Cupriavidus sp. IrC4 isolated from a wastewater treatment plant, in Rungkut-Surabaya. Bacterial consortia were formulated by mixing equal proportions of pure bacterial cultures. Consortium 1, 2, 3, and 4 consisted of ...

Metal NP synthesis using microorganisms has emerged as an eco-friendly, clean, and viable strategy alternative to chemical and physical approaches. Herein, an original and efficient route for the microbial synthesis of copper NPs using bacterial strains newly isolated from an Antarctic consortium is …

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 ...

：. In this study, ability of moderately thermophilic bacterial consortium to extract metals from electronic scrap was evaluated using shake flasks and lab-scale column reactor. We investigated the effects of having additional energy source (FeS2, S-0, FeS2 + S-0), using different consortia of moderately thermophilic bacteria and washing ...

Bacterial consortium for copper extraction from sulphide ore consisting mainly of chalcopyrite Facebook Twitter. Outras redes sociais; Google+; LinkedIn; Reddit; StambleUpon; CiteULike; Mendeley; Outras redes; Métricas

Purification of Laccases from Bacterial Consortium . Jyotsna Kiran Peter*1 Priyam Vandana2 Harison Masih3 Yashab Kumar4. Department of Microbiology and Fermentation Technology, Jacob School of Biotechnology and Bioengineering, Sam Higginbottom Institute of Agriculture Technology and Sciences . Allahabad, India, .

leaching bacteria have been reported to carry on various interactions (competition, synergism, and mutualism) in ... the Chambishi consortium (ZC) and the Dexing consortium (DC), respectively. In bioleaching, using Dexing ore sample, ... Iron and copper extraction rates were calculated as

In bacterial extraction of copper from low‐grade copper sulfide ores, at least three contributions are made by Thiobacillus ferrooxidans. They are: (1) enzymatic oxidation and consequent solubilization of insoluble sulfides; (2) regeneration of ferric lixiviant for chemical oxidation and solubilization of insoluble sulfides; and (3) partial fixation of externally introduced iron in the ore.

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 CuSO 4 ions into single-atom zero-valent copper (Cu 0) by a copper-resistant bacterium isolated from a copper mine in Brazil.Furthermore, the biosynthetic mechanism of Cu 0 production is ...

a bacterial consortium. Compared with an established protocol for lysis and DNA purification using the ... extract metals such as aluminum (Al), copper (Cu), chromium (Cr), lead (Pb) and zinc (Zn) ... for extracting amplifiable bacterial DNA from heavy oil–contaminated soil. The aim of this study was to compare two protocols: the first uses a ...

OSTI.GOV Journal Article: Copper extraction from coarsely ground printed circuit boards using moderate thermophilic bacteria in a rotating-drum reactor. Copper extraction from coarsely ground printed circuit boards using moderate thermophilic bacteria in a rotating-drum reactor.

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 ...

Abstract. Retnanimgrum E, Wilopo W, Warmada IW. 2021. Enhancement of manganese extraction in a biochar-enriched bioleaching column with a mixed culture of indigenous bacteria. Biodiversitas 22: 2949-2955. Biochar can improve manganese ore extraction during bioleaching by inducing redox reactions and providing a porous matrix for bacterial attachment.

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.

The toxicity of waste printed circuit boards (PCBs) to bacteria was considered as the major limitation in bioleaching of copper from PCBs. To reduce the toxicity of PCBs, copper extraction from PCBs was investigated using bacteria-free cultural supernatant from some metallurgical microbial consortium, whose predominant organisms were Leptospirillum ferriphilum and Sulfobacillus ...

We have created a consortium of microorganisms (fungi and bacteria) that have the ability to detoxify wood treated with copper/azole in laboratory conditions within few days. The consortium is made of the white rot fungus Phanerochaete chrysosporium and 10 bacterial strains isolated from the mycosphere of the fungus.

The consortium confers special ability to leach copper sulfide ores and heavy metals (arsenic and copper) by these bacteria. The genome of the five organisms reveals information about specific roles each play in the consortium which can be used in the design of bioleaching plant and how interventions can be made directly in bioreactors ...

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.

5 Isolation and identification of soil bacteria able to remove copper 711 Table 1 Three unknown bacterial soil isolates, identified by fatty acids profile as resulted from GC-MS readings, using RTSBA6 library Fatty acid name Fatty acid concentration Unknown 1 Unknown 2 Unknown 3 11:0 iso 0.000.15 12:0 iso 0.000.83 12:0 (acid lauric) 0.000.52

Microbial consortia execute collaborative molecular processes with contributions from individual species, on such basis enabling optimized molecular function. Such collaboration and synergies benefit metabolic flux specifically in extreme environmental conditions as seen in acid mine drainage, with biofilms as relevant microenvironment. However, knowledge about community species …

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

The results indicated that the extraction of copper was mainly accomplished indirectly through oxidation by ferric ions generated from ferrous ion oxidation bacteria. The initial pH and Fe 2+ concentration played an important role in copper extraction and precipitate formation. The leaching rate of copper was generally higher at lower PCB ...

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.

The results indicated that the extraction of copper was mainly accomplished indirectly through oxidation by ferric ions generated from ferrous ion oxidation bacteria, and the leaching period was shortened remarkably from about 12 days to 5 days. The objectives of this study were to evaluate the solubility of copper in waste printed circuit boards (PCBs) by bacterial consortium enriched from ...

Highlights: • Copper bioleaching from PCB (20 mm) by moderate thermophiles was demonstrated. • Larger PCB sheets enable a cost reduction due to the elimination of fine grinding. • Crushing generated cracks in PCB increasing the copper extraction…

A protocol for Metagenomic RNA extraction from bacterial consortium in the presence of crude oil Received for publication, September 09, 2013 Accepted, October 08, 2013 MICHEL CANUL-CHAN, NEYI ESTRELLA-GÓMEZ, ALEJANDRO ZEPEDA, DIANA CABAÑAS-VARGAS, RAFAEL ROJAS-HERRERA Facultad de Ingeniería Química, Campus de Ingenierías y Ciencias Exactas.

Bacterial extraction of metals is not a new technology as it has been in application for ore leaching for centuries, though the mechanism remained unknown. Specifically copper was recov-Preston Devasia is a senior lecturer at the Vellore Institute of Technology. He teaches and studies microbial biotechnology and diversity. K A Natarajan is

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 ...

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. The major native bacterial species …

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 …