Results 201 to 210 of about 18,311 (249)
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Hydrometallurgy, 1987
Abstract Organic acid leaching of nepheline has been studied under batch and semi-continuous laboratory conditions. Rates of leaching by citric and oxalic acids (as purified compounds and as the mixed product of Aspergillus niger fermentation) have been compared with those of hydrochloric acid for batches of mineral (−37 +53 μm) and acid stirred at ...
Andrew B. King, A.William L. Dudeney
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Abstract Organic acid leaching of nepheline has been studied under batch and semi-continuous laboratory conditions. Rates of leaching by citric and oxalic acids (as purified compounds and as the mixed product of Aspergillus niger fermentation) have been compared with those of hydrochloric acid for batches of mineral (−37 +53 μm) and acid stirred at ...
Andrew B. King, A.William L. Dudeney
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Biotechnology Letters, 1992
Microbiological acid solutions produced byThiobacillus ferrooxidans andThiobacillus thiooxidans on pyritiferous concentrate were used to solubilize phosphate rock with a high grade in P2O5. Five different mixtures of pyritiferous concentrate and phosphate rock, in different proportions, were used in adequate liquid culture media.
A. C. A. Costa +2 more
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Microbiological acid solutions produced byThiobacillus ferrooxidans andThiobacillus thiooxidans on pyritiferous concentrate were used to solubilize phosphate rock with a high grade in P2O5. Five different mixtures of pyritiferous concentrate and phosphate rock, in different proportions, were used in adequate liquid culture media.
A. C. A. Costa +2 more
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, 2020
Rare earth elements (REEs) are important high-tech materials with widespread industrial applications and a high risk of supply disruption. Current physico-chemical methods for REE recovery are energy intensive, complex, and costly. Thus, it is crucial to
P. Rasoulnia, R. Barthen, A. Lakaniemi
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Rare earth elements (REEs) are important high-tech materials with widespread industrial applications and a high risk of supply disruption. Current physico-chemical methods for REE recovery are energy intensive, complex, and costly. Thus, it is crucial to
P. Rasoulnia, R. Barthen, A. Lakaniemi
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International Journal of Biological Macromolecules, 2022
The essential role of polysaccharides and proteins of extracellular polymeric substances (EPS) has been well known in the bioleaching process. However, there is no information on the role of these compositions in the bioleaching of spent coin cells (SCCs)
T. Naseri, S. Mousavi
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The essential role of polysaccharides and proteins of extracellular polymeric substances (EPS) has been well known in the bioleaching process. However, there is no information on the role of these compositions in the bioleaching of spent coin cells (SCCs)
T. Naseri, S. Mousavi
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Journal of Environmental Management, 2022
Harmful chemicals present in electric vehicle Li-ion batteries (EV LIBs) can limit the pulp density of bioleaching processes using Acidithiobacillus sp. to 1.0% (w/v) or lower.
Jia Wang +6 more
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Harmful chemicals present in electric vehicle Li-ion batteries (EV LIBs) can limit the pulp density of bioleaching processes using Acidithiobacillus sp. to 1.0% (w/v) or lower.
Jia Wang +6 more
semanticscholar +1 more source
2016
Universal reserves of high-grade ores are diminishing at an alarming rate due to the rapid increase in the demand for metals. Biomining is the extraction of specific metals from their ores through biological means, usually microorganism. Biomining is done in two steps often called bioleaching and biooxidation.
Surabhi Mahajan +2 more
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Universal reserves of high-grade ores are diminishing at an alarming rate due to the rapid increase in the demand for metals. Biomining is the extraction of specific metals from their ores through biological means, usually microorganism. Biomining is done in two steps often called bioleaching and biooxidation.
Surabhi Mahajan +2 more
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Hydrometallurgy, 1995
Abstract Extraction of metals by the application of bioleaching methods holds great promise. Various physicochemical parameters, such as the biomass availability of CO 2 , particle size, mineralogy of the ore, and pulp density, influence the bioleaching rates.
K.K. Dwivedy, A.K. Mathur
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Abstract Extraction of metals by the application of bioleaching methods holds great promise. Various physicochemical parameters, such as the biomass availability of CO 2 , particle size, mineralogy of the ore, and pulp density, influence the bioleaching rates.
K.K. Dwivedy, A.K. Mathur
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Hydrometallurgy, 2014
The effect of sequential leaching such as bioleaching followed by bioleaching and bioleaching followed by chemical leaching is aimed at enhancing metal (Mo, Ni, V and Al) dissolution from a differently pretreated (acetone washed/decoked) spent catalyst.
Srichandan, H. +5 more
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The effect of sequential leaching such as bioleaching followed by bioleaching and bioleaching followed by chemical leaching is aimed at enhancing metal (Mo, Ni, V and Al) dissolution from a differently pretreated (acetone washed/decoked) spent catalyst.
Srichandan, H. +5 more
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Investigating heap bioleaching: Effect of feed iron concentration on bioleaching performance
Minerals Engineering, 2010Abstract This paper describes an investigation into the effect of iron concentration in the leach solution on the bioleaching of a low grade copper ore, where chalcopyrite was the dominant copper sulphide. The concentration of dissolved iron is primarily controlled by pH and the relative proportion of ferric to ferrous iron, with significant jarosite
Robert P. van Hille +3 more
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BioSigma Bioleaching Seeds (BBS): A New Technology for Managing Bioleaching Microorganisms
Advanced Materials Research, 2013In Bioleaching, although it is already prove that chalcopyrite can be dissolved by microorganisms, a major task is to do it efficiently in economical terms at industrial scale. BioSigma Bioleaching Seeds (BBS) represents a biotechnological breakthrough for the production of bioleaching solutions on demand with high concentrations of biomining ...
Patricio Martínez, Pilar Parada
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