Abstract
In recent years there has been an increasing interest in the electrochemical properties of metal sulfides. Our main sources of copper, lead, zinc, and nickel occur as sulfides and they are converted to the metal by pyrometallurgical processes which produce gaseous sulfur dioxide. The environmental requirements being imposed on sulfide smelters have led to a greater effort to develop hydrometallurgical routes for the treatment of sulfides in order to avoid the evolution of sulfur dioxide. These processes involve the oxidation of sulfides to sulfur or sulfate either using oxidants such as oxygen, ferric ion, or cupric ion1 or by direct anodic oxidation in an electrolyte.2 The oxidation of sulfides by an oxidant can be regarded as an electrochemical reaction with the cathodic reduction of the oxidant and the anodic oxidation of the sulfide,3 and it can consequently be studied by electrochemical techniques. Recent work4,5 has also shown that flotation, a key process in concentrating sulfide ores, can be electrochemical in nature.
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Koch, D.F.A. (1975). Electrochemistry of Sulfide Minerals. In: Bockris, J.O., Conway, B.E. (eds) Modern Aspects of Electrochemistry. Modern Aspects of Electrochemistry, vol 10. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-7446-0_4
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