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Adsorption of biosolids and their main components on chalcopyrite, molybdenite and pyrite: Zeta potential and FTIR spectroscopy studies

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dc.contributor.author Reyes-Bozo, Lorenzo
dc.contributor.author Escudey, Mauricio
dc.contributor.author Vyhmeister, Eduardo
dc.contributor.author Higueras, Pablo
dc.contributor.author Godoy Faúndez, Alex
dc.contributor.author Salazar, José Luis
dc.contributor.author Valdés-González, Héctor
dc.contributor.author Wolf-Sepúlveda, German
dc.contributor.author Herrera-Urbina, Ronaldo
dc.date.accessioned 2016-08-11T17:33:33Z
dc.date.available 2016-08-11T17:33:33Z
dc.date.issued 2015
dc.identifier.citation Minerals Engineering, 2015, vol.78, p. 128-135
dc.identifier.uri http://hdl.handle.net/11447/731
dc.identifier.uri http://dx.doi.org/10.1016/j.mineng.2015.04.021
dc.description.abstract Zeta potential measurements were used to assess the electrokinetic characteristics of chalcopyrite, molybdenite and pyrite in the presence of biosolids and their main components (humic acids, glucose and serum albumin) as well as a commercial collector (Aero 6697). Fourier transform infrared spectroscopy (FTIR) was then used to gain a deeper understanding of the interaction of these compounds with these sulfide minerals. It aims to achieve a better understanding of the surface chemistry of sulfide-water interfaces that improve froth flotation at industrial scale in the step of copper sulfide ore concentration. Zeta potential results show that hydrogen and hydroxide ions are potential determining ions for each sulfide mineral studied. The addition of 50 g/t biosolids or all the other chemicals used in this investigation shift the isoelectric point of chalcopyrite. Under the same conditions, only humic acid significantly affects the zeta potential of molybdenite, making it more negative in the pH range investigated, and shifting its isoelectric point about 6 pH units. These compounds seem to have a poor affinity with pyrite surfaces because their zeta potential is slightly modified. FTIR spectroscopy characterization shows that biosolids and their main components can interact with chalcopyrite, molydenite and pyrite surfaces through a complex mechanism involving chemical or physical linkages. The results reported here seem to indicate that biosolids may be used as new environment-friendly froth flotation agents to concentrate copper and molybdenum sulfide minerals. (C) 2015 Elsevier Ltd. All rights reserved.
dc.language.iso en_US
dc.subject Chalcopyrite
dc.subject Molybdenite
dc.subject Zeta potential
dc.subject Biosolids
dc.subject Humic acids
dc.title Adsorption of biosolids and their main components on chalcopyrite, molybdenite and pyrite: Zeta potential and FTIR spectroscopy studies
dc.type Artículo


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