Oxidation of chalcopyrite in air-equilibrated acidic solution: Inhibition with phenacyl derivatives

https://doi.org/10.1016/S1003-6326(20)65351-1Get rights and content

Abstract

The effects of 4-(2-hydroxyphenyl)-2-(morpholin-4-yl)-1,3-thiazole (Pr02), 1-(3,5-dibromo-2-hydroxyphenyl)- 1-oxoethan-2-yl-N,N-diethyldithiocarbamate (Pr04) and 1-(5-bromo-2-hydroxy-3-methylphenyl)-1-oxoethan-2-yl-O- ethyl xanthate (Pr06) on the aqueous oxidation of chalcopyrite (CuFeS2) in air-equilibrated solution at a temperature of 25 °C and a pH of 2.5 were studied. The effects were investigated by using potentiodynamic polarization, electro- chemical impedance spectroscopy (EIS), scanning electron microscopy coupled with energy dispersive X-ray (SEM/EDX) analysis, aqueous batch experiments, Fourier transform infrared (FTIR) spectroscopy, Raman scattering and quantum chemical calculations. It is found that the anodic current densities decrease in the order of EtOH > Pr02 > Pr04 > Pr06. These results, along with those of the EIS measurements, show that Pr02, Pr04 and Pr06 are effective anodic inhibitors of chalcopyrite aqueous oxidation. Both Raman scattering and FTIR spectroscopy indicate that the elemental sulfur, polysulfide and ferric oxyhydroxides that form on the surface of the mineral are not responsible when it comes to the aqueous oxidation inhibition of chalcopyrite. Quantum chemical calculations show that the adsorption of the tested compounds on the chalcopyrite surface is energetically favorable and so, it can explain the inhibiting effects that were observed.

References (55)

  • S WU et al.

    Sulfur composition on surface of chalcopyrite during its bioleaching at 50 °C [J]

    Transactions of Nonferrous Metals Society of China

    (2015)
  • Y LI et al.

    Chalcopyrite dissolution: Scanning photoelectron microscopy examination of the evolution of sulfur species with and without added iron or pyrite [J]

    Geochimica et Cosmochimica Acta

    (2017)
  • P CHIRITA et al.

    Oxidative dissolution of iron monosulfide (FeS) in acidic conditions: The effect of solid pretreatment [J]

    International Journal of Mineral Processing

    (2015)
  • H G LINGE

    A study of chalcopyrite dissolution in acidic ferric nitrate by potentiometric titration [J]

    Hydrometallurgy

    (1976)
  • X SHU et al.

    Passivation of metal-sulfide tailings by covalent coating [J]

    Minerals Engineering

    (2013)
  • P CHIRITA et al.

    Inhibitory effect of three phenacyl derivatives on the oxidation of sphalerite (ZnS) in air-equilibrated acidic solution [J]

    Corrosion Science

    (2018)
  • C E BADICA et al.

    An electrochemical study of the oxidative dissolution of iron monosulfide (FeS) in air-equilibrated solutions [J]

    Electrochimica Acta

    (2015)
  • K BABIC-SAMARDZIJA et al.

    Investigation of the inhibiting action of O, S and N-dithiocarbamato(1,4,8,11-tetraazacyclotetradecane) cobalt (III) complexes on the corrosion of iron in HClO4 acid [J]

    Applied Surface Science

    (2005)
  • Y M ABDALLAH

    Electrochemical studies of phenyl sulphonyl ethanone derivatives compounds on corrosion of aluminum in 0.5 M H2SO4 solutions [J]

    Journal of Molecular Liquids

    (2016)
  • M EL BELGHITI et al.

    Experimental, quantum chemical and Monte Carlo simulation studies of 3,5-disubstituted-4-amino-1,2,4- triazoles as corrosion inhibitors on mild steel in acidic medium [J]

    Journal of Molecular Liquids

    (2016)
  • G GECE et al.

    Quantum chemical study of some cyclic nitrogen compounds as corrosion inhibitors of steel in NaCl media [J]

    Corrosion Science

    (2009)
  • Y QIANG et al.

    Experimental and theoretical studies on the corrosion inhibition of copper by two indazole derivatives in 3.0% NaCl solution [J]

    Journal of Colloid and Interface Science

    (2016)
  • S M J KOLEINI et al.

    Acidic sulphate leaching of chalcopyrite concentrates in presence of pyrite [J]

    Minerals Engineering

    (2011)
  • M HOU et al.

    Solvent effects on geometrical structures and electronic properties of metal Au, Ag, and Cu nanoparticles of different sizes [J]

    Journal of Colloid Interface Science

    (2015)
  • P CHIRITA et al.

    Pyrite oxidation in air-equilibrated solutions: An electrochemical study [J]

    Chemical Geology

    (2017)
  • T TUKEN et al.

    The corrosion behaviour of polypyrrole coating synthesized in phenylphosphonic acid solution [J]

    Applied Surface Science

    (2006)
  • Y L MIKHLIN et al.

    Spectroscopic and XRD studies of the air degradation of acid-reacted pyrrhotites [J]

    Geochimica et Cosmochimica Acta

    (2002)
  • Cited by (2)

    • Structure-activity relationships of oxime compounds as flotation collectors by DFT calculations

      2022, Transactions of Nonferrous Metals Society of China (English Edition)
    View full text