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

Lorenzo Reyes-Bozo, Mauricio Escudey, Eduardo Vyhmeister, Pablo Higueras, Alex Godoy-Faúndez, José Luis Salazar, Héctor Valdés-González, Germán Wolf-Sepúlveda, Ronaldo Herrera-Urbina

Resultado de la investigación: Article

33 Citas (Scopus)

Resumen

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.

Idioma originalEnglish
Páginas (desde-hasta)128-135
Número de páginas8
PublicaciónMinerals Engineering
Volumen78
DOI
EstadoPublished - 1 jul 2015
Publicado de forma externa

Huella dactilar

Biosolids
molybdenite
Pyrites
biosolid
Zeta potential
chalcopyrite
FTIR spectroscopy
Sulfide minerals
Fourier transform infrared spectroscopy
pyrite
spectroscopy
sulfide
Spectroscopy
Froth flotation
adsorption
Humic Substances
Adsorption
Sulfides
Copper
Flotation agents

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Chemistry(all)
  • Geotechnical Engineering and Engineering Geology
  • Mechanical Engineering

Citar esto

Reyes-Bozo, L., Escudey, M., Vyhmeister, E., Higueras, P., Godoy-Faúndez, A., Salazar, J. L., ... Herrera-Urbina, R. (2015). Adsorption of biosolids and their main components on chalcopyrite, molybdenite and pyrite: Zeta potential and FTIR spectroscopy studies. Minerals Engineering, 78, 128-135. https://doi.org/10.1016/j.mineng.2015.04.021
Reyes-Bozo, Lorenzo ; Escudey, Mauricio ; Vyhmeister, Eduardo ; Higueras, Pablo ; Godoy-Faúndez, Alex ; Salazar, José Luis ; Valdés-González, Héctor ; Wolf-Sepúlveda, Germán ; Herrera-Urbina, Ronaldo. / Adsorption of biosolids and their main components on chalcopyrite, molybdenite and pyrite : Zeta potential and FTIR spectroscopy studies. En: Minerals Engineering. 2015 ; Vol. 78. pp. 128-135.
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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.",
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Reyes-Bozo, L, Escudey, M, Vyhmeister, E, Higueras, P, Godoy-Faúndez, A, Salazar, JL, Valdés-González, H, Wolf-Sepúlveda, G & Herrera-Urbina, R 2015, 'Adsorption of biosolids and their main components on chalcopyrite, molybdenite and pyrite: Zeta potential and FTIR spectroscopy studies', Minerals Engineering, vol. 78, pp. 128-135. https://doi.org/10.1016/j.mineng.2015.04.021

Adsorption of biosolids and their main components on chalcopyrite, molybdenite and pyrite : Zeta potential and FTIR spectroscopy studies. / Reyes-Bozo, Lorenzo; Escudey, Mauricio; Vyhmeister, Eduardo; Higueras, Pablo; Godoy-Faúndez, Alex; Salazar, José Luis; Valdés-González, Héctor; Wolf-Sepúlveda, Germán; Herrera-Urbina, Ronaldo.

En: Minerals Engineering, Vol. 78, 01.07.2015, p. 128-135.

Resultado de la investigación: Article

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T1 - Adsorption of biosolids and their main components on chalcopyrite, molybdenite and pyrite

T2 - Zeta potential and FTIR spectroscopy studies

AU - Reyes-Bozo, Lorenzo

AU - Escudey, Mauricio

AU - Vyhmeister, Eduardo

AU - Higueras, Pablo

AU - Godoy-Faúndez, Alex

AU - Salazar, José Luis

AU - Valdés-González, Héctor

AU - Wolf-Sepúlveda, Germán

AU - Herrera-Urbina, Ronaldo

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N2 - 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.

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