Bioleaching of cobalt from Cu/Co-rich sulfidic mine tailings from the polymetallic Rammelsberg mine, Germany

Zhang, Ruiyong; Hedrich, Sabrina; Römer, Felix; Goldmann, Daniel; Schippers, Axel

doi:10.1016/j.hydromet.2020.105443

Cited by 62 publications

(23 citation statements)

References 41 publications

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“…The pH was adjusted to ≤ 2.0 with H 2 SO 4 (95.0-98.0%) at the beginning of the experiments, but only in conditions where the pH was higher than 2.0. This pH adjustment makes the system comparable with bioleaching processes, where this procedure is commonly reported [28,29]. Solid-liquid separation was carried out using vacuum filtration.…”

Section: Experimental Methodsmentioning

confidence: 99%

Leaching of Cu, Zn, and Pb from Sulfidic Tailings Under the Use of Sulfuric Acid and Chloride Solutions

Schueler

Aguiar

Vera

et al. 2021

J. Sustain. Metall.

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The imbalance between raw materials of high economic importance and their supply has increased the search for new approaches to obtain valuable elements from mining tailings. In this study, the extraction of copper, zinc, and lead from sulfidic tailing in sulfate–chloride media was investigated. A 33 Box–Behnken design was applied to evaluate three variables over a 4-h testing period: sulfuric acid concentration (0.01–1.0 mol/L H2SO4), sodium chloride (10–60 g/L NaCl), and temperature (20–70 °C). The design showed two optimum working regions: a combination of a high NaCl level, low H2SO4 level, and medium temperature level for lead leaching, while for copper and zinc, a combination of a medium–high H2SO4 level and a high temperature level. The concentration of NaCl had only a slight impact on their leaching. Based on these results, two-stage leaching was performed. The first stage was carried out under an experimental condition that favored the leaching of lead (60 g/L NaCl, 0.01 mol/L H2SO4, 45 °C, 1 h, 10:1 liquid-to-solid ratio), whereas the second stage maximized the leaching of copper and zinc (60 g/L NaCl, 0.5 mol/L H2SO4, 70 °C, 24 h, 10:1 liquid-to-solid ratio). The global leaching rate was 66.8 ± 3.0% copper, 84.1 ± 5.2% zinc, and 93.9 ± 3.2% lead. The iron and arsenic content were also leached by about 20 and 50% at the end of the second stage. The study demonstrated that the use of sulfate–chloride media in a two-stage leaching considerably improved the extraction of the desired metals and was, therefore, suitable for their recovery. Graphical Abstract

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Section: Experimental Methodsmentioning

confidence: 99%

Leaching of Cu, Zn, and Pb from Sulfidic Tailings Under the Use of Sulfuric Acid and Chloride Solutions

Schueler

Aguiar

Vera

et al. 2021

J. Sustain. Metall.

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“…Simple shrinking core modelling of mineral dissolution indicates that for typical grainsizes of mine tailings (∼50-500 µm; Lapakko et al, 2006;Koomson and Asiam, 2013;Ndlovu et al, 2017;Zhang et al, 2020a), relatively fast mineral dissolution rates (W r ) of greater than ∼10 −9 -10 −10 mol m −2 s −1 are required for near complete weathering of mine waste minerals on reasonable societal timescales of years to decades (Figure 4). However, estimated particle dissolution times are strongly dependent on grain size distributions and specific surface area (Gbor and Jia, 2004), and empirical studies with actual mine tailings are required to verify estimates.…”

Section: Efficacy Of Enhanced Weathering Of Mine Wastesmentioning

confidence: 99%

Global Carbon Dioxide Removal Potential of Waste Materials From Metal and Diamond Mining

et al. 2021

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There is growing urgency for CO2 removal strategies to slow the increase of, and potentially lower, atmospheric CO2 concentrations. Enhanced weathering, whereby the natural reactions between CO2 and silicate minerals that produce dissolved bicarbonate ions are accelerated, has the potential to remove substantial CO2 on decadal to centennial timescales. The global mining industry produces huge volumes of fine wastes that could be utilised as feedstock for enhanced weathering. We have compiled a global database of the enhanced weathering potential of mined metal and diamond commodity tailings from silicate-hosted deposits. Our data indicate that all deposit types, notably mafic and ultramafic rock-hosted operations and high tonnage Cu-hosting deposits, have the potential to capture ~1.1–4.5 Gt CO2 annually, between 31 and 125% of the industry's primary emissions. However, current knowledge suggests that dissolution rates of many minerals are relatively slow, such that only a fraction (~3–21%) of this potential may be realised on timescales of <50 years. Field trials in mine settings are urgently needed and, if this prediction is confirmed, then methodologies for accelerating weathering reactions will need to be developed.

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“…Mine tailings samples were obtained by coring from 15 to 26 m depths of the Rammelsberg sulfidic mine tailings in the Harz Mountains near Goslar, Germany (51°52′ N 10°25′ E) [18]. The main mineral phases of the samples were barite, OPEN ACCESS quartz, pyrite, and sphalerite.…”

Section: Isolation and Ecologymentioning

confidence: 99%

“…Bioleaching experiments at low pH in basal salts (BS) medium were carried out for metal extraction from the tailings samples [ 18 ]. A mixed enrichment culture including the natural microbial community in these samples was obtained.…”

Section: Isolation and Ecologymentioning

confidence: 99%

Sulfobacillus harzensis sp. nov., an acidophilic bacterium inhabiting mine tailings from a polymetallic mine

Zhang

Hedrich

Jin

et al. 2021

International Journal of Systematic and Evolutionary Microbiology

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A mixotrophic and acidophilic bacterial strain BGR 140T was isolated from mine tailings in the Harz Mountains near Goslar, Germany. Cells of BGR 140T were Gram-stain-positive, endospore-forming, motile and rod-shaped. BGR 140T grew aerobically at 25–55 °C (optimum 45 °C) and at pH 1.5–5.0 (optimum pH 3.0). The results of analysis of the 16S rRNA gene sequences indicated that BGR 140T was phylogenetically related to different members of the genus Sulfobacillus , and the sequence identities to Sulfobacillus acidophilus DSM 10332T, Sulfobacillus thermotolerans DSM 17362T, and Sulfobacillus benefaciens DSM 19468T were 94.8, 91.8 and 91.6 %, respectively. Its cell wall peptidoglycan is A1γ, composed of meso-diaminopimelic acid. The respiratory quinone is DMK-6. The major polar lipids were determined to be glycolipid, phospholipid and phosphatidylglycerol. The predominant fatty acid is 11-cycloheptanoyl-undecanoate. The genomic DNA G+C content is 58.2 mol%. On the basis of the results of phenotypic and genomic analyses, it is concluded that strain BGR 140T represents a novel species of the genus Sulfobacillus , for which the name Sulfobacillus harzensis sp. nov. is proposed because of its origin. Its type strain is BGR 140T (=DSM 109850T=JCM 39070T).

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Bioleaching of cobalt from Cu/Co-rich sulfidic mine tailings from the polymetallic Rammelsberg mine, Germany

Cited by 62 publications

References 41 publications

Leaching of Cu, Zn, and Pb from Sulfidic Tailings Under the Use of Sulfuric Acid and Chloride Solutions

Leaching of Cu, Zn, and Pb from Sulfidic Tailings Under the Use of Sulfuric Acid and Chloride Solutions

Global Carbon Dioxide Removal Potential of Waste Materials From Metal and Diamond Mining

Sulfobacillus harzensis sp. nov., an acidophilic bacterium inhabiting mine tailings from a polymetallic mine

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