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Related Experiment Videos

Temperature effect on xanthate sorption by chalcopyrite.

S Mustafa1, A Hamid, A Naeem

  • 1National Center of Excellence for Physical Chemistry, University of Peshawar, Peshawar, Pakistan. smustafa49@yahoo.com

Journal of Colloid and Interface Science
|June 5, 2004
PubMed
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The sorption of xanthate ions onto copper ore (chalcopyrite) increases with temperature, indicating an endothermic process. This adsorption mechanism is consistent with ion exchange, as supported by Freundlich equation fits and calculated heats of adsorption.

Area of Science:

  • Mineral processing and extractive metallurgy
  • Surface chemistry and adsorption phenomena

Background:

  • Xanthate collectors are crucial in the flotation of copper sulfide minerals like chalcopyrite.
  • Understanding the adsorption mechanism and thermodynamics of xanthate on copper ore is vital for optimizing mineral recovery processes.

Purpose of the Study:

  • To investigate the sorption behavior of xanthate ions on copper ore (chalcopyrite).
  • To determine the influence of temperature and pH on xanthate adsorption.
  • To elucidate the adsorption mechanism and thermodynamic characteristics.

Main Methods:

  • Sorption experiments conducted across a temperature range of 273-293 K and pH range of 8-11.
  • Analysis of solution chemistry (pH changes, ore dissolution, SO2(4)- concentration).

Related Experiment Videos

  • Fourier Transform Infrared (FTIR) spectroscopy to study surface interactions.
  • Application of the Freundlich adsorption isotherm model.
  • Calculation of isosteric heats of adsorption (DeltaHi).

    • Main Results:

    • Xanthate ion sorption on chalcopyrite increased with increasing temperature at all tested pH values.
    • Adsorption data successfully fitted the linear form of the Freundlich equation.
    • Calculated isosteric heats of adsorption (DeltaHi) confirmed the endothermic nature of the adsorption process.

    Conclusions:

    • The adsorption of xanthate on copper ore is an endothermic process.
    • The experimental results and calculated thermodynamic parameters support an ion exchange mechanism for xanthate sorption on chalcopyrite.
    • Findings provide valuable insights for optimizing xanthate dosage and flotation conditions in copper ore processing.