Journal ArticleDOI
A critical review of the surface chemistry of acidic ferric sulphate dissolution of chalcopyrite with regards to hindered dissolution
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TLDR
In this paper, a conceptual 4-stage model is proposed which explains all the general dissolution behaviour that is widely observed, i.e. of an induction period and a parabolic rate curve that may or may not be followed by linear rate behaviour.About:
This article is published in International Journal of Mineral Processing.The article was published on 2008-03-28. It has received 284 citations till now. The article focuses on the topics: Dissolution.read more
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Acid mine drainage: Challenges and opportunities
TL;DR: A review of the state-of-the-art of acid mine drainage can be found in this article, where the authors critically analyze the work performed in recent years on its occurrence, effects (on human health, plant life and aquatic species), and summarizes the remediation approaches taken so far to overcome the problem of AMD.
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A review of the structure, and fundamental mechanisms and kinetics of the leaching of chalcopyrite.
TL;DR: There is general agreement in the literature that chalcopyrite leaching is significantly affected by solution redox potential with an optimum E(h) range suggesting the participation of leach steps that involve both oxidation and reduction.
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Electrochemical and XPS analysis of chalcopyrite (CuFeS2) dissolution in sulfuric acid solution
TL;DR: In this paper, the influence of potential on the species and surface films formed during electrodissolution of chalcopyrite were investigated in 0.5 M sulfuric acid solution at 25°C.
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Chalcopyrite hydrometallurgy at atmospheric pressure: 1. Review of acidic sulfate, sulfate–chloride and sulfate–nitrate process options
TL;DR: In this paper, the authors present a review of current knowledge in respect of sulfate-sulfuric acid systems and highlight potentially rewarding areas for future research, including the potential to exploit alternative oxidants to ferric ion.
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Current scenario of chalcopyrite bioleaching: a review on the recent advances to its heap-leach technology.
TL;DR: Advances in the designing of heap bioleaching plant along with microbial and environmental factors of importance have been reviewed with conclusions into the future prospects of chalcopyriteBioleaching.
References
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Schwertmannite and the chemical modeling of iron in acid sulfate waters.
TL;DR: In this article, an analysis of ochreous sediments and associated solutions from twenty-eight mine drainage sites showed that precipitates formed at pH 6.5 or higher were composed of ferrihydrite (nominally Fe5HO8 · 4H2O) or a mixture of ferria and goethite (α-FeOOH), whereas those precipitated from waters having pH values in the range of 2.8 to 4.5 were predominantly schwertmannite (ideally Fe8O8(OH)6SO4) with trace
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The bioleaching of sulphide minerals with emphasis on copper sulphides — A review
TL;DR: The main focus is on heap bioleaching of whole ores, and the development of models to describe heap and dump processes that can be applied in the design phase as well as to optimise metal extraction.
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Passivation of chalcopyrite during oxidative leaching in sulfate media
TL;DR: In this paper, the oxygen pressure leaching behavior of chalcopyrite in the temperature range 110-220°C was studied to shed new light on the reasons for the slow leaching.
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X-ray photoelectron and Auger electron spectroscopic studies of pyrrhotite and mechanism of air oxidation
A.R. Pratt,I.J Muir,H.W. Nesbitt +2 more
TL;DR: In this article, the first spectroscopic evidence to indicate Fe(III)-oxyhydroxide species forming in pyrrhotite has been presented, based on X-ray photoelectron spectroscopy and Auger Electron Spectroscopy (AES).
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XPS of sulphide mineral surfaces: metal‐deficient, polysulphides, defects and elemental sulphur
TL;DR: In this article, evidence from other techniques confirming assignment of high-binding-energy S 2p components to metal-deficient sulphide surfaces, polysulphides, elemental sulphur and electronic defect structures is considered for specific cases.