Bioleaching of arsenic-rich cobalt mineral resources, and evidence for concurrent biomineralisation of scorodite during oxidative bio-processing of skutterudite

Johnson, D. Barrie; Dybowska, Agnieszka; Schofield, P. F.; Herrington, Richard; Smith, Sarah L.; Santos, Ana Laura

doi:10.1016/j.hydromet.2020.105395

Cited by 20 publications

(11 citation statements)

References 24 publications

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“…As a consequence, the obtained results are of importance due to the As(V) adsorption being executed at ambient temperature and with only 2 h of reaction, incorporating the metal into a compact and crystalline structure such as AsO 4 , and substituting the SO 4 , in a stable form, as was reported by other authors [ 35 ], where it was demonstrated that As(V) remains in the decomposed structure of ammonium jarosite with As(V). Further, in works related to the bioleaching process of arsenic-rich minerals, it was found that this process could promote the substitution of AsO 4 for SO 4 , and when the pyrite bioleaching occurs in presence of these minerals, this can result in the oxidation of As(III) to As(V), which also acted as the promoting seed for scorodite crystallization [ 48 ], as was found in this work, where AsO 4 also could promote the recrystallization of decomposed jarosite after As(V) adsorption.…”

Section: Discussionmentioning

confidence: 99%

Synthesis, Characterization and Decomposition of Potassium Jarosite for Adsorptive As(V) Removal in Contaminated Water: Preliminary Study

Cerecedo‐Sáenz

Hernández-Lazcano

González-Bedolla

et al. 2022

IJERPH

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Jarosite-type compounds precipitated in the zinc industry for iron control can also incorporate arsenic and can be used for wastewater treatment for As elimination. According with the last, this work is related to arsenic incorporation at room temperature in decomposed potassium jarosite. The work began with the synthesis of the compound at 75 °C for 9 h using Fe2(SO4)3 and K2SO4 at a pH of 1.1. Once jarosite was obtained, solids were subjected to an alkaline decomposition using NaOH at pH 10 for 30 min, and then As was added to the solution as HAsNaO4 and the pH modified by adding HNO3 until it reached a value of 1.1. The initial, intermediate, and final products were wholly characterized by scanning electron microscopy (SEM) in conjunction with energy dispersive spectrometry (EDS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy (RS), and X-ray photoelectron spectrometry (XPS). The obtained results show that As(V) can be adsorbed by ionic exchange in the amorphous FeOH structure of decomposed jarosite and when pH decreased to 1.1, the compound recrystallized, incorporating up to 6% As on average, which is indicative that this process can be used to reduce As in contaminated waters.

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Section: Discussionmentioning

confidence: 99%

Synthesis, Characterization and Decomposition of Potassium Jarosite for Adsorptive As(V) Removal in Contaminated Water: Preliminary Study

Cerecedo‐Sáenz

Hernández-Lazcano

González-Bedolla

et al. 2022

IJERPH

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“…Mineralogical and chemical analyses of limonite samples were carried out using a combination of techniques, described below. Bulk chemical analyses were performed using induction coupled plasma mass spectrometry (ICP-MS) and induction coupled plasma atomic emission spectroscopy (ICP-AES) as described by Johnson et al (2020) . Samples were prepared by lithium metaborate/lithium tetraborate fusion for major elements (Si, Fe, Al, Ca, K, Mn, Ti, Cr, Na) by 4-acid digestion for trace elements and analysed at ALS Global Laboratories (Loughrea, Ireland).…”

Section: Methodsmentioning

confidence: 99%

Chromium (VI) Inhibition of Low pH Bioleaching of Limonitic Nickel-Cobalt Ore

et al. 2022

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Limonitic layers of the regolith, which are often stockpiled as waste materials at laterite mines, commonly contain significant concentrations of valuable base metals, such as nickel, cobalt, and manganese. There is currently considerable demand for these transition metals, and this is projected to continue to increase (alongside their commodity values) during the next few decades, due in the most part to their use in battery and renewable technologies. Limonite bioprocessing is an emerging technology that often uses acidophilic prokaryotes to catalyse the oxidation of zero-valent sulphur coupled to the reduction of Fe (III) and Mn (IV) minerals, resulting in the release of target metals. Chromium-bearing minerals, such as chromite, where the metal is present as Cr (III), are widespread in laterite deposits. However, there are also reports that the more oxidised and more biotoxic form of this metal [Cr (VI)] may be present in some limonites, formed by the oxidation of Cr (III) by manganese (IV) oxides. Bioleaching experiments carried out in laboratory-scale reactors using limonites from a laterite mine in New Caledonia found that solid densities of ∼10% w/v resulted in complete inhibition of iron reduction by acidophiles, which is a critical reaction in the reductive dissolution process. Further investigations found this to be due to the release of Cr (VI) in the acidic liquors. X-ray absorption near edge structure (XANES) spectroscopy analysis of the limonites used found that between 3.1 and 8.0% of the total chromium in the three limonite samples used in experiments was present in the raw materials as Cr (VI). Microbial inhibition due to Cr (VI) could be eliminated either by adding limonite incrementally or by the addition of ferrous iron, which reduces Cr (VI) to less toxic Cr (III), resulting in rates of extraction of cobalt (the main target metal in the experiments) of >90%.

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“…Thus, both toxicity of the mineral ore material and resistance of the leaching bacteria have a great significance for biomining. There are various points of view on the problem of the arsenopyrite leaching which include not only toxicity, but also the formation of scorodite and solubility of the minerals surface [ 67 , 68 ].…”

Section: Problems Of Bioleaching Of Metals From Refractory Arsenic-co...mentioning

confidence: 99%

Current Trends in Metal Biomining with a Focus on Genomics Aspects and Attention to Arsenopyrite Leaching—A Review

Абашина

Vainshtein

2023

Microorganisms

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The presented review is based on scientific microbiological articles and patents in the field of biomining valuable metals. The main attention is paid to publications of the last two decades, which illustrate some shifts in objects of interest and modern trends both in general and applied microbiology. The review demonstrates that microbial bioleaching continues to develop actively, despite various problems in its industrial application. The previous classic trends in the microbial bioleaching persist and remain unchanged, including (i) the search for and selection of new effective species and strains and (ii) technical optimization of the bioleaching process. Moreover, new trends were formed during the last decades with an emphasis on the phylogeny of leaching microbiota and on genomes of the leaching microorganisms. This area of genomics provides new, interesting information and forms a basis for the subsequent construction of new leaching strains. For example, this review mentions some changed strains with increased resistance to toxic compounds. Additionally, the review considers some problems of bioleaching valuable metals from toxic arsenopyrite.

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Bioleaching of arsenic-rich cobalt mineral resources, and evidence for concurrent biomineralisation of scorodite during oxidative bio-processing of skutterudite

Cited by 20 publications

References 24 publications

Synthesis, Characterization and Decomposition of Potassium Jarosite for Adsorptive As(V) Removal in Contaminated Water: Preliminary Study

Synthesis, Characterization and Decomposition of Potassium Jarosite for Adsorptive As(V) Removal in Contaminated Water: Preliminary Study

Chromium (VI) Inhibition of Low pH Bioleaching of Limonitic Nickel-Cobalt Ore

Current Trends in Metal Biomining with a Focus on Genomics Aspects and Attention to Arsenopyrite Leaching—A Review

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