Bioleaching of cobalt from an arsenidic ore

Giebner, Fabian; Kaden, Laura; Wiche, Oliver; Tischler, Judith S.; Schopf, Simone; Schlömann, Michael

doi:10.1016/j.mineng.2018.10.020

Cited by 13 publications

(2 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One more source for the recovery of Co is from arsenides deposits since there are minerals such as safflorite (CoAs2), and skutterudite (CoAs3). But there is little of that mineral, and currently, only the Bou Azzer mine in Morocco produces cobalt as its main product [85]. Gienberg et al implemented a bioleaching and Leptospirillum ferriphilum (DSM14647) supplemented with citric acid (HOC(CH₂CO₂H)₂), using a mineral that contains (i) loellingite, (ii) safflorite, and (iii) skutterudite [85].…”

Section: Recovery Of Cobalt Arsenides From Moroccomentioning

confidence: 99%

Cobalt Metal: Overview of Deposits, Reserves, Processing, and Recycling

Picazo-Rodriguez,

Toro,

Román

et al. 2023

Preprint

View full text Add to dashboard Cite

Cobalt, like other critical elements, is gaining in importance today. The great technological advances and the deep knowledge of the physical and chemical properties of this element have allowed to enhance its applications in various fields, such as: catalysts, paints, alloys for the mechanical and aerospace industries, as well as the medical sector and in recent times, its use within the rechargeable battery industry. The main exploitable deposits are in the Democratic Republic of the Congo, which have economic potential due to a strong influence on their mineralization processes. However, the growing demand for cobalt and the search for less dependence on African deposits leads to targeting other regions, so it is necessary to carry out exhaustive exploration to find out the potential of its reserves for a subsequent benefit of the mineral. Generally, cobalt comes as a by-product of the extraction of other metallic minerals, mainly from Cu-Co, Ni-Co, Ni-Cu-Co deposits. From the above, a first review is carried out on the differences that exist in the geochemical, mineralogical and forecast properties that exist within the different deposits that harbor cobalt. As a second review topic, it delves into efficient processing for cobalt recovery, which is generally carried out by flotation, acid leaching, in addition to its recovery from secondary sources, such as batteries and metallurgical waste. However, generally speaking there is still a vast lack of fundamental knowledge about the processability of cobalt. Said processing has been affected from the point of view of mineralogy, that is, understanding and knowing the cobalt-bearing minerals, as well as gangue mineralogy, these aspects exercise significant control during their processing and selection of the most appropriate route. suitable for cobalt extraction (leaching and/or flotation). In this context, the document concludes with a vision of the challenges that the mining industry must implement to enter circular economy models, mainly in the creation of sustainable processes from secondary sources.

show abstract

Section: Recovery Of Cobalt Arsenides From Moroccomentioning

confidence: 99%

Cobalt Metal: Overview of Deposits, Reserves, Processing, and Recycling

Picazo-Rodriguez,

Toro,

Román

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…The inoculum was prepared from a mixed culture designated BiCoNi4 as described elsewhere [29] ). The medium was modified with respect to a pH of 1.8 and an Fe 2+ concentration of 20 mM as described previously [29].…”

Section: Strains and Growth Conditionsmentioning

confidence: 99%

Biodismantling, a Novel Application of Bioleaching in Recycling of Electronic Wastes

2020

Self Cite

View full text Add to dashboard Cite

Electronic components (EC) from waste electrical and electronic equipment (WEEE) such as resistors, capacitors, diodes and integrated circuits are a subassembly of printed circuit boards (PCB). They contain a variety of economically valuable elements e.g., tantalum, palladium, gold, and rare earth elements. However, until recently there has been no systematic dismantling and recycling of the EC to satisfy the demand for raw materials. A problem connected with the recycling of the EC is the removal of the components (dismantling) in order to recover the elements in later processing steps. The aim of the present study was to develop a new technique of dismantling using bioleaching technology to lower costs and environmental impact. In triplicate batch experiments, used PCBs were treated by bioleaching using an iron-oxidizing mixed culture largely dominated by Acidithiobacillus ferrooxidans strains supplemented with 20 mM ferrous iron sulfate at pH 1.8 and 30 °C for 20 days. Abiotic controls were treated by similar conditions in two different variations: 20 mM of Fe2+ and 15 mM of Fe3+. After 20 days, successful dismantling was obtained in both the bioleaching and the Fe3+ control batch. The control with Fe2+ did not show a significant effect. The bioleaching condition presented a lower rate of dismantling which can partially be explained by a constantly higher redox potential leading to a competition of solder leaching and copper leaching from the printed copper wires. The results showed that biodismantling—dismantling using bioleaching—is possible and can be a new unit operation of the recycling process to maximize the recovery of valuable metals from PCBs.

show abstract