Topical Collection "Bioleaching"

Editor

Collection Editor
Dr. Anna H. Kaksonen

CSIRO Land and Water, 147 Underwood Avenue, Floreat, WA 6014, Australia
Website | E-Mail
Interests: biomining; bioleaching; biooxidation; bioreduction; bioprecipitation; biocorrosion; biogeochemistry; bioflotation; biofouling; biohydrometallurgy; biotechnical treatment

Topical Collection Information

Dear Colleagues,

Since the discovery of bioleaching microorganisms and their role in metal extraction in the 1940s, a number of approaches have been developed to enhance microbially catalysed solubilisation of metals. These include reactor/tank, vat, lagoon, heap, dump, in place or in situ leaching techniques. Bioleaching has enabled the transformation of uneconomic resources to reserves, and thus helped to alleviate the challenges related to continually declining ore grades. Commercial biomining applications have mainly targeted copper, gold, uranium, nickel, cobalt and zinc sulfides. More recently, the possibilities of bioleaching oxide ores and extracting other commodities such as rare earth elements and phosphorus have also been explored. Progress in characterising microbial strains and communities has increased our understanding of the microbial catalysts, and facilitated the optimisation of bioleaching processes. For this topical collection, we invite contributions on various aspects of bioleaching, including but not limited to bioleaching methods, mechanisms, microorganisms, and applications to extract various commodities from ores, concentrates as well as waste materials.

Both original contributions and reviews are welcome.

Dr. Anna H. Kaksonen
Collection Editor

Manuscript Submission Information

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Keywords

  • biohydrometallurgy
  • bioleaching
  • bioleaching microorganisms
  • bioleaching methods
  • bioleaching mechanisms
  • bioleaching of ores and concentrates
  • bioleaching of waste materials
  • biomining
  • biooxidation
  • biorecovery
  • oxidative bioleaching
  • reductive bioleaching

Published Papers (4 papers)

2018

Jump to: 2017

Open AccessArticle The Evidence of Decisive Effect of Both Surface Microstructure and Speciation of Chalcopyrite on Attachment Behaviors of Extreme Thermoacidophile Sulfolobus metallicus
Minerals 2018, 8(4), 159; doi:10.3390/min8040159
Received: 25 January 2018 / Revised: 4 April 2018 / Accepted: 9 April 2018 / Published: 13 April 2018
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Abstract
The effect of the surface microstructure and chemical speciation of chalcopyrite on the attachment behaviors of thermoacidophilic archaeon Sulfolobus metallicus was evaluated for the first time by using integrated techniques including epifluorescence microscopy (EFM) and sulfur K-edge X-ray absorption near edge structure (S
[...] Read more.
The effect of the surface microstructure and chemical speciation of chalcopyrite on the attachment behaviors of thermoacidophilic archaeon Sulfolobus metallicus was evaluated for the first time by using integrated techniques including epifluorescence microscopy (EFM) and sulfur K-edge X-ray absorption near edge structure (S K-edge XANES) spectroscopy, as well as scanning electron microscopy with energy dispersive spectrometry (SEM/EDS) and Fourier transform infrared (FT-IR) spectroscopy. In order to obtain the specific surface, the chalcopyrite slices were electrochemically oxidized at 0.87 V and reduced at −0.54 V, respectively. The EFM analysis showed that the quantity of cells attaching on the mineral surface increased with time, and the biofilm formed faster on the electrochemically treated slices than on the untreated ones. The SEM-EDS analysis indicated that the deficiency in energy substrate elemental sulfur (S0) in the specific microsize of local defect sites was disadvantageous to the initial attachment of cells. The XANES and FT-IR data suggested that the elemental sulfur (S0) could be in favor of initial attachment, and surface jarosites inhibited the adsorption and growth of S. metallicus. These results demonstrated that not only the surface microstructure but also the chemical speciation defined the initial attachment behaviors and biofilm growth of the extreme thermophilic archaeon S. metallicus. Full article
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Open AccessReview Copper Bioleaching in China: Review and Prospect
Minerals 2018, 8(2), 32; doi:10.3390/min8020032
Received: 22 November 2017 / Revised: 2 January 2018 / Accepted: 15 January 2018 / Published: 23 January 2018
Cited by 1 | PDF Full-text (5766 KB) | HTML Full-text | XML Full-text
Abstract
The commercial application of copper bioleaching, an environmentally-friendly approach for low-grade and secondary mineral resources recycling, has increased worldwide since the 2000s. As the world’s second-largest economic entity and the largest developing country, China has the largest demand for metal resources, significantly advancing
[...] Read more.
The commercial application of copper bioleaching, an environmentally-friendly approach for low-grade and secondary mineral resources recycling, has increased worldwide since the 2000s. As the world’s second-largest economic entity and the largest developing country, China has the largest demand for metal resources, significantly advancing the theory and industrial technology of copper bioleaching. This paper reviews the exploration and application of copper bioleaching in China. Two typical bioleaching applications and technological processes, bioheap leaching at the Zijinshan Copper Mine and bioheap leaching at the Dexing Copper Mine, are introduced. The considerable research completed by researchers is summarized, especially focusing on the isolation and identification of leaching bacteria, the bioleaching mechanism and interface reactions, multistage percolation behavior, bioleaching system reconstruction, the multiphysics coupled model, and enhanced copper bioleaching from waste printed circuit boards (WPCBs). Based on this investigation in China, key trends and prospects in copper bioleaching—such as efficiency improvement, environmental protection, and improved technology applications—are proposed. Full article
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Open AccessArticle Vanadium Bioleaching Behavior by Acidithiobacillus ferrooxidans from a Vanadium-Bearing Shale
Minerals 2018, 8(1), 24; doi:10.3390/min8010024
Received: 15 November 2017 / Revised: 2 January 2018 / Accepted: 11 January 2018 / Published: 15 January 2018
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Abstract
This study investigated bioleaching behavior of vanadium from a vanadium-bearing shale using Acidithiobacillus ferrooxidans (A. ferrooxidans). Results showed a maximum recovery of 62% vanadium in 1.2-day bioleaching, which was 22.45% higher than the controls. Then, the vanadium leaching efficiency decreased significantly,
[...] Read more.
This study investigated bioleaching behavior of vanadium from a vanadium-bearing shale using Acidithiobacillus ferrooxidans (A. ferrooxidans). Results showed a maximum recovery of 62% vanadium in 1.2-day bioleaching, which was 22.45% higher than the controls. Then, the vanadium leaching efficiency decreased significantly, only 24% of that was obtained on the tenth day. The vanadium extraction in 1.2 days was mainly attributed to the dissolution of vanadium in free oxides of shale. Fe3+ produced by A. ferrooxidans promoted the dissolution process. X-ray diffraction (XRD) patterns of the leached residues confirmed the generation of jarosite. SEM-EDS analysis of the residues indicated that jarosite adsorbed on the shale and inhibited the further dissolution of vanadium. The relevance of V, Fe, S, O was quite good in the energy disperse X-ray spectrometry (EDS) element mapping of jarosite, and acid-washing of the jarosite resulted in 31.6% of the vanadium in the precipitates desorption, indicating that the decrease of vanadium leaching efficiency in bioleaching process was caused by both adsorption and co-precipitation with jarosite. Full article
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2017

Jump to: 2018

Open AccessArticle Co-Bioleaching of Chalcopyrite and Silver-Bearing Bornite in a Mixed Moderately Thermophilic Culture
Minerals 2018, 8(1), 4; doi:10.3390/min8010004
Received: 22 October 2017 / Revised: 4 December 2017 / Accepted: 20 December 2017 / Published: 26 December 2017
Cited by 1 | PDF Full-text (2652 KB) | HTML Full-text | XML Full-text
Abstract
Chalcopyrite and bornite are two important copper minerals, and they often coexist. In this study, the co-bioleaching of chalcopyrite and silver-bearing bornite by mixed moderately thermophilic culture at 50 °C was investigated. The bioleaching results show that the extraction percentage of Cu for
[...] Read more.
Chalcopyrite and bornite are two important copper minerals, and they often coexist. In this study, the co-bioleaching of chalcopyrite and silver-bearing bornite by mixed moderately thermophilic culture at 50 °C was investigated. The bioleaching results show that the extraction percentage of Cu for co-bioleaching of chalcopyrite (Ccp) and silver-bearing bornite (Bn) (Ccp/Bn = 3:1) was 94.6%. Compared to bioleaching of chalcopyrite or silver-bearing bornite alone, the Cu extraction percentage was greatly enhanced when they were bioleached together. The leaching residues were characterized by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Silver-bearing bornite dissolved preferentially compared to chalcopyrite, due to galvanic interactions. Simultaneously, Ag+ was released from the silver-bearing bornite into solution. Ag2S formed on the surface because Cu and Fe in the chalcopyrite were replaced by Ag+, accelerating chalcopyrite dissolution and enrichment of Ag on the surface of the chalcopyrite. Full article
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