Weathering of phlogopite in simulated bioleaching solutions

Bhatti, Tariq M.; Bigham, Jerry M.; Vuorinen, Antti; Tuovinen, Olli H.

doi:10.1016/j.minpro.2010.10.004

Cited by 19 publications

(8 citation statements)

References 7 publications

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“…ferrooxidans thereby maintains iron in the oxidised state. Although iron-oxidising bacteria will preferentially colonise Fe-sulphides (Edwards et al, 1999), recent studies demonstrate that populations of A. ferrooxidans can be sustained on a range of silicate minerals, including biotite (Dopson et al, 2009;Bhatti et al, 2011a), phlogopite (Bigham et al, 2001;Bhatti et al, 2011b), fayalite (Santelli et al, 2001;Welch and Banfield, 2002;Dopson et al, 2009), hornblende, augite and microcline (Dopson et al, 2009). These studies demonstrate that A. ferrooxidans is capable of utilizing ferrous iron released during acid neutralisation reactions of Fe-bearing silicates.…”

Section: Accepted Manuscriptmentioning

confidence: 97%

“…It is therefore possible that A. ferrooxidans are able to access Fe(II) and/or that magnetite functions as P sink which attracts bacteria. The bioleaching of biotite and phlogopite by A. ferrooxidans can lead to structural changes due to K + solubilisation from interlayers, which can precipitate with Fe(III) as K-jarosite (Bhatti et al, 2011a;Bhatti et al, 2011b;Dopson et al, 2009). No studies on chlorite have been completed to date.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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Bioleaching of waste material from the Salobo mine, Brazil: Recovery of refractory copper from Cu hosted in silicate minerals

et al. 2018

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Section: Accepted Manuscriptmentioning

confidence: 97%

Section: Accepted Manuscriptmentioning

confidence: 99%

Bioleaching of waste material from the Salobo mine, Brazil: Recovery of refractory copper from Cu hosted in silicate minerals

et al. 2018

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“…and bacteria like Chromobacterium violaceum (Ilyas et al, 2010; Mishra and Rhee, 2014). Generally, fungi can work well between pH values ranging from 2 to 8, and also in a temperature range of 20°C–40°C (Bhatti et al, 2011). The extremely thermophilic archaea, such as Metallosphera sedula and Sulfolobus sp., have been recently identified in the laboratory and applied gradually into the biohydrometallurgy, especially for the bioleaching of highly refractory metal sulphide ores, owing to their tolerance to extreme conditions (Tao and Dongwei, 2014).…”

Section: Fundamentals Of Biohydrometallurgymentioning

confidence: 99%

Biohydrometallurgy as an environmentally friendly approach in metals recovery from electrical waste: A review

2020

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Nowadays, large amount of municipal solid waste is because of electrical scraps (i.e. waste electrical and electronic equipment) that contain large quantities of electrical conductive metals like copper and gold. Recovery of these metals decreases the environmental effects of waste electrical and electronic equipment (also called E-waste) disposal, and as a result, the extracted metals can be used for future industrial purposes. Several studies reported in this review, demonstrated that the biohydrometallurgical processes were successful in efficient extraction of metals from electrical and electronic wastes. The main advantages of biohydrometallurgy are lower operation cost, less energy input, skilled labour, and also less environmental effect in comparison with pyro-metallurgical and hydrometallurgical processes. This study concentrated on fundamentals and technical aspects of biohydrometallurgy. Some points of drawbacks and research directions to develop the process in the future are highlighted in brief.

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“…The diffraction peak at 2θ = 8.7 • (1.0 nm) is attributed to the characteristic peak for some mica group silicate. [27,28] Comparison of the XRD patterns of VMT and OVMT showed that the location of the 8.7 • peak did not change after the ion exchange reaction.…”

Section: Downloaded By [Uq Library] At 17:50 01 November 2014mentioning

confidence: 99%

Synergistic Effect of Organic Vermiculite on the Flame Retardancy and Thermal Stability of Intumescent Polypropylene Composites

Chen

Wang

Kang

et al. 2013

Journal of Macromolecular Science, Part B

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Organic vermiculite (OVMT) prepared from vermiculite (VMT), with high aspect ratio and orderly arranged platelets intercalated by octadecyl trimethyl ammonum bromide (OTAB), was used as a synergistic agent on the flame retardancy of a polypropylene/intumescent flame retardant (PP/IFR) system. The flammability and thermal stability of PP/IFR/OVMT composites were investigated by limiting oxygen index (LOI), UL-94 testing, cone calorimetry tests, and thermogravometric analysis. The results of LOI and UL-94 testing showed that low loading of OVMT improved the flame retardancy and retarded dripping for PP/IFR composites. OVMT, with 1% loading, increased the char residue of PP/IFR composites and could act as an effective additive for improvement in flame retardancy, which was confirmed by the cone data. The char layer morphological structures observed by scanning electron microscopy (SEM) showed that OVMT with 1% loading can promote formation of a continuous and compact intumescent char layer. Raman spectroscopy results indicated that the OVMT or its pyrolytic products led to a decrease in size of the carbonaceous micro-domain during combustion, resulting in formation of more compact charred layers. Thus, OVMT with 1% loading showed a synergistic effect with IFR in the combustion of the PP/IFR composites.

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Weathering of phlogopite in simulated bioleaching solutions

Cited by 19 publications

References 7 publications

Bioleaching of waste material from the Salobo mine, Brazil: Recovery of refractory copper from Cu hosted in silicate minerals

Bioleaching of waste material from the Salobo mine, Brazil: Recovery of refractory copper from Cu hosted in silicate minerals

Biohydrometallurgy as an environmentally friendly approach in metals recovery from electrical waste: A review

Synergistic Effect of Organic Vermiculite on the Flame Retardancy and Thermal Stability of Intumescent Polypropylene Composites

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