bioleaching and chemical leaching as an integrated

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  Bioleaching - an overview | ScienceDirect Topics

  Bioleaching is a common term used for biomining, in which the microbes are used for metal extraction from low-grade ores. It engages the mobilization of positively charged heavy metal ions from the insoluble ores by biological dissolution processes and bio-oxidation.

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  Bioleaching - an overview | ScienceDirect Topics

  Microbial leaching ( bioleaching) is also proposed for the decontamination of polluted solid waste, soils, or sediments. Successful demonstration of the bioleaching of toxic metals from an anaerobically digested sewage sludge was demonstrated on a technological scale.

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  Base metals (Fe, Al, Ti) and rare earth elements (Ce, La, Pr) leaching ...

  202431 · This study presents a novel chemical-biological hybrid procedure, assisted by a chelating agent and a one-step bioleaching from RM. Initially, a leaching process as a pretreatment was conducted using 0.23 M oxalic acid at 80 °C, with 200 rpm agitation for 4 h, at a pulp density of 10 g/L.

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  An integrated insight into bioleaching performance of chalcopyrite ...

  202111 · However, few studies focused on the integrated effects of both microbial oxidizing types and species diversity on chalcopyrite bioleaching, leading to a narrow understanding of the dominant roles of microorganisms in leaching system.

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  Bioleaching: urban mining option to curb the menace of E …

  2020614 · Hence, to curb the E-waste menace, firstly an entire E-waste value chain is needed to be explored to delineate a sustainable model with a focus toward an integrated approach. The resource recovery from E-waste using bioleaching method has been studied extensively and explored at a laboratory scale.

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  Bacterial and chemical leaching of chalcopyrite concentrates as ...

  20141110 · Controlled redox potential in the bioleaching of chalcopyrite was also evaluated by Córdoba et al. (2008c). They reported that redox potential increased relatively rapidly to the maximum value (650 mV) in bacterial cultures and improved copper dissolution while the chemical leaching was unaffected under these conditions.

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  Indirect bioleaching recovery of valuable metals from …

  2022615 · • Active bioleachate leaching of electroplating sludge. • Rapid and efficient extraction of valuable metals by the active bioleachate. • The bioleaching process has some advantages over simple chemical leaching. • Determining the optimal process parameters by response surface method. • Detoxification of electroplating sludge was realized through …

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  A comprehensive review of bioleaching optimization by …

  2023525 · Most thermal methods are prohibitive due to high energy consumption and hazardous gases (dioxin and furans) that result in environmental pollution. Hydrometallurgical processes use environmentally hazardous chemicals for metals leaching and generate a large amount of by-products, which requires further processing for …

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  Sphalerite bioleaching comparison in shake flasks and …

  201931 · Abstract. Bioleaching experiments with a mixed Acidithiobacillus -culture were carried out in shake flasks as well as in column percolators with crushed and sieved sphalerite-rich ore from a former mine in the German Harz Mountains. Efficient sphalerite dissolution in the bioleaching assays was observed in contrast to the chemical leaching ...

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  Progress in bioleaching: fundamentals and mechanisms of

  2022104 · Abstract Bioleaching of metal sulfides is performed by diverse microorganisms. The dissolution of metal sulfides occurs via two chemical pathways, either the thiosulfate or the polysulfide pathway. These are determined by the metal sulfides’ mineralogy and their acid solubility. The microbial cell enables metal sulfide dissolution …

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