The extremophilic archaea are adept at leaching chalcopyrite, which is particularly refractory to ambient temperature leaching with Fe 3+. Heap bioleaching of lowgrade, coarsely crushed chalcopyrite ore using thermophilic bacteria and archaea is under development.
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Aiming to determine general mechanisms of formation of process properties in copper-pyrite ore tailings, the comprehensive analysis of mineralogical composition of tailings …
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and they are usually rimmed by quartz and calcite [28]. Chalcopyrite is mined for Cu, but Ag is also extracted as a by-product [14,27]. With respect to hydrothermal alterations and vein-style mineralization in porphyry systems, chalcopyrite exhibits a distribution similar to pyrite, but it is generally absent in propylitic alteration [16].
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Oppositely, the exploitation of biomass-derived molecules presents an increasingly developed strategy for cleaner production that improves sustainability by reducing environmental impact [1][2][3][4].
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Challenging established narratives and acknowledging the colonial histories of natural history collections is an essential first step in addressing the structural racism that …
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A detailed review of chalcopyrite deposits, production and consumption, mining, ore processing, steps involved in the pyrometallurgical and hydrometallurgical processing of copper as well as the...
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The electrochemical response of a massive chalcopyrite electrode at two different temperatures, 25°C and 68°C, were compared. The electrolyte used in the experiments was an acidic medium (0.4 g ·1 −1 (NH 4) 2 SO 4, 0.5 g ·1 −1 MgSO 4 · 7H 2 O, 0.2 g ·1 −1 K 2 HPO 4 at pH = 2) which is suitable for the growth of the microorganisms involved in the bioleaching …
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Chalcopyrite, the most abundant copper-bearing mineral, is known to be recalcitrant to dissolution, and much research has been conducted to solve the difficulties that hinder its viable exploitation (Davenport et al., 1976). In efforts to provide the copper industry with an efficient way to recover copper from chalcopyrite ores, various dissolution
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Chalcopyrite ores are usually processed by means of hydrometallurgical or pyrometallurgical processes, but due to environmental aspects and the possibility of increased exploitation of mixed and...
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Chalcopyrite is the most widely distributed copper-bearing ore in nature [1–5], and it is also the main raw material for copper extracting. At present, 80–85% of the copper in the world is …
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Chalcopyrite is the primary copper mineral used for production of copper metal. Today, as a result of rapid industrialization, there has been enormous demand to profitably …
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A detailed review of chalcopyrite deposits, production and consumption, mining, ore processing, steps involved in the pyrometallurgical and hydrometallurgical processing of copper as well as the dissolution kinetics and …
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However, the exploitation of these sulfides during centuries has led to their scarcity, leaving as an alternative the most abundant copper sulfide in nature, but also the most refractory in leaching ... chalcopyrite reacts slowly with the hydrogen ion present in the acidic solution to form H 2 S (evidenced by the image in ...
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The objective of this study was isolate a bacterial consortium present in mineral composed mainly of chalcopyrite-bornite and determine which of this isolated consortiums was …
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Therefore, the exploitation and utilization of cobalt resources are becoming increasingly important. ... the chalcopyrite recovery decreased from 90.45 % to 75.92 % as pH increased from 3 to 11, while, with the increase of pH from 3 to 5 and then to 11, those of carrollite decreased from 44.56 % to 11.76 %, and subsequently basically remained ...
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SEM back-scattered electron images of chalcopyrite from different mineralization stages from the quartz monzonite (a-c) and the latite (d-f): (a) chalcopyrite (Cpy) is intergrown with pyrite (Py ...
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The chalcopyrite grains of Meliadine contain Cd, but no other trace element in chalcopyrite were found in any sample. All the grains of sphalerite analyzed were iron sphalerite and contain Cd: 1.16 ± 0.09 wt. % in the LaRonde sample, 0.37 ± 0.21 wt. % in the Pirquitas sample, and 1.00 ± 0.12 wt. % in the Westwood sample.
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As chalcopyrite (CuFeS 2) is the most abundant but also the most refractory of the copper sulfides, and with the current extensive exploitation of low-grade oxide and secondary sulfides, it is clear that the proportion of low-grade ores containing chalcopyrite will increase in the future. Therefore, there are imperatives to improve ...
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With the continuous exploitation of ores, the grade of chalcopyrite and galena has been falling (Liu et al., 2020). Moreover, chalcopyrite often coexists with galena in natural deposits. Froth flotation is commonly used to enrich and separate chalcopyrite and galena before smelting to improve the comprehensive utilization of copper and lead ...
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Heap bioleaching of lowgrade, coarsely crushed chalcopyrite ore using thermophilic bacteria and archaea is under development. Lessons learned from decades of biomining have provided …
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Abstract Chalcopyrite ores are usually processed by means of hydrometallurgical or pyrometallurgical processes, but due to environmental aspects and the possibility of increased …
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Two samples (chalcopyrite and quartz) were used in this study. A chalcopyrite sample was acquired from Copper Queen Mine, Arizona USA, while the quartz sample (99% purity) was obtained from Wako Pure Chemical Industries Co., Ltd., Osaka, Japan. ... are needed to limit socio-environmental impacts of resources exploitation and maintain the sector ...
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Chalcopyrite is a mineral and ore of copper. Its chemical composition is CuFeS2, meaning it contains copper (Cu), iron (Fe), and sulfur (S). Chalcopyrite is one of the most important copper ores and is widely distributed …
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Abstract. Chalcopyrite ores are usually processed by means of hydrometallurgical or pyrometallurgical processes, but due to environmental aspects and the possibility of increased exploitation of mixed and lower grade ores and relatively small isolated deposits, there has been a worldwide upsurge of interest in the hydrometallurgical processes of this ore as compared to …
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