Abstract
The extraction of base metals from sulfide mineral ores is of major industrial and economic importance, and as a consequence considerable effort has been, and continues to be, expended on research to maximize the extraction efficiency. Several unit operations in the extraction process involve interactions at the solid-liquid interface, and these interactions can be modified to achieve enhanced processing efficiency by the adsorption of organic reagents at the surface of the solid phase. In this chapter, the different ways in which organic reagents can interact with a solid surface are first described generally and then more specifically in relation to froth flotation and electrowinning, two of the most important unit operations in base metal production. In addition to a detailed treatment of the relevant adsorption mechanisms, the principal surface analytical techniques that have been used to elucidate these mechanisms are described. For the study of collector adsorption in flotation, both in situ and ex situ techniques are covered, with spectroelectro-chemical studies and UV-visible spectroscopy included in the former, conventional (anode-generated) X-ray photoelectron and secondary ion mass spectroscopies representing the latter, and with FTIR and Raman scattering spectroscopies applicable in both situations. For the study of adsorption of reagents to influence deposit morphology in electrowinning, electrochemical techniques and surface enhanced Raman scattering spectroscopy are emphasized. It is shown that the combination of in situ and ex situ electrochemical and spectroscopic techniques represents a powerful approach for investigating the adsorption of organic reagents in the recovery of metals from sulfide ores.
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Buckley, A.N., Hope, G.A., Woods, R. (2003). Metals from Sulfide Minerals: The Role of Adsorption of Organic Reagent in Processing Technologies. In: Wandelt, K., Thurgate, S. (eds) Solid—Liquid Interfaces. Topics in Applied Physics, vol 85. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-44817-9_2
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