Bioleaching of zinc from low-grade complex sulfide ores in an airlift by isolated Leptospirillum ferrooxidans

Giaveno, Alejandra; Lavalle, L.; Chiacchiarini, P.; Donati, Edgardo R.

doi:10.1016/j.hydromet.2007.07.002

Cited by 45 publications

(25 citation statements)

References 20 publications

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“…In kinetic studies of bioleaching systems, generally, it is assumed that the concentration of the leaching agent (such as Fe 3+ ) is constant (da Silva, 2004;Giaveno et al, 2007). However, the concentration of Fe 3+ can vary significantly during a bioleaching process (Fig.…”

Section: Kinetics Of Column Bioleachingmentioning

confidence: 99%

Column bioleaching copper and its kinetics of waste printed circuit boards (WPCBs) by Acidithiobacillus ferrooxidans

et al. 2015

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Section: Kinetics Of Column Bioleachingmentioning

confidence: 99%

Column bioleaching copper and its kinetics of waste printed circuit boards (WPCBs) by Acidithiobacillus ferrooxidans

et al. 2015

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“…During the bioleaching process, media pH and redox potential were determined at every day using calibrated pH meter (Eutech Instruments, Singapore) and platinum electrode against a reference electrode of Ag/AgCl 13 , respectively. For every 2 day interval, 5 mL of the sample from the media were collected and centrifuged at 3000 rpm.…”

Section: Analytical Techniquesmentioning

confidence: 99%

Rate Kinetics on Bioleaching of Realgar Mineral by Leptospirillum ferriphilum: Effects of Fe (II) Concentration

2017

JCBSC

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Abstract:The eco-friendly method of metal extraction, bacterial leaching is gaining more important in bio-hydrometallurgical industry. It is a proven method and can be applied for leaching process of several metals. This study was aimed to determine the efficiency of arsenic leaching from realgar mineral using the bacteria, Leptospirillum ferriphilum. The experiments were carried out in shaker flask, at fixed parameters 180 rpm, 0.2% pulp density (PD), 313 K at an initial pH of the media 1.5. The energy source, Fe 2+ concentration was varied from 2−10 g/L. The effect of Fe 2+ concentration on the kinetics of arsenic extraction was investigated. The experiment results showed that leaching of arsenic was highly influenced by concentration of Fe 2+ used in the medium. The maximum of 74.42% As was leached after 30 days when using optimum of 6 g/L of Fe 2+. Kinetic studies showed that the maximum rate constant value, 1.3633 d 1, was observed when optimum concentration of energy source was used.

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“…• comparisons of different reactor designs or modes of operation [250,[257][258][259]; and • development of hybrid processes in which the base metals were bioleached and precious metals or lead were extracted subsequently from the leached residues in a secondary process [235,[260][261][262].…”

Section: Ores With Low Organic Contentmentioning

confidence: 99%

Review of Biohydrometallurgical Metals Extraction from Polymetallic Mineral Resources

Watling

2014

Minerals

140

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This review has as its underlying premise the need to become proficient in delivering a suite of element or metal products from polymetallic ores to avoid the predicted exhaustion of key metals in demand in technological societies. Many technologies, proven or still to be developed, will assist in meeting the demands of the next generation for trace and rare metals, potentially including the broader application of biohydrometallurgy for the extraction of multiple metals from low-grade and complex ores. Developed biotechnologies that could be applied are briefly reviewed and some of the difficulties to be overcome highlighted. Examples of the bioleaching of polymetallic mineral resources using different combinations of those technologies are described for polymetallic sulfide concentrates, low-grade sulfide and oxidised ores. Three areas for further research are: (i) the development of sophisticated continuous vat bioreactors with additional controls; (ii) in situ and in stope bioleaching and the need to solve problems associated with microbial activity in that scenario; and (iii) the exploitation of sulfur-oxidising microorganisms that, under specific anaerobic leaching conditions, reduce and solubilise refractory iron(III) or manganese(IV) compounds containing multiple elements. Finally, with the successful applications of stirred tank bioleaching to a polymetallic tailings dump and heap bioleaching to a polymetallic black schist ore, there is no reason why those proven technologies should not be more widely applied.

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Bioleaching of zinc from low-grade complex sulfide ores in an airlift by isolated Leptospirillum ferrooxidans

Cited by 45 publications

References 20 publications

Column bioleaching copper and its kinetics of waste printed circuit boards (WPCBs) by Acidithiobacillus ferrooxidans

Column bioleaching copper and its kinetics of waste printed circuit boards (WPCBs) by Acidithiobacillus ferrooxidans

Rate Kinetics on Bioleaching of Realgar Mineral by Leptospirillum ferriphilum: Effects of Fe (II) Concentration

Review of Biohydrometallurgical Metals Extraction from Polymetallic Mineral Resources

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