Kinetic Study of Copper and Cobalt Dissolution from Sulfidic Ores in Sulfate–chloride Media

Kubangala Brest Kasongo, Mbal Henock Michel Mwanat, Ntumba Edward Malenga, Mamookho Elizabeth Makhatha

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


This study investigated the operating parameters that affect the kinetic dissolution of copper and cobalt from sulfidic ores. The sulfuric acid concentration, temperature, sodium chloride concentration, particle size range, and leaching time were selected to deduce the kinetic mechanism of the leaching reaction. Other parameters, such as a stirring speed of 250 rpm and the percentage solid 10% w/v, remained constant. The results reveal that an increase in acid concentration enhances the leaching rate of copper and cobalt. Copper and cobalt dissolution was positively affected by the addition of sodium chloride. The highest leaching rates of copper and cobalt were 24.71% and 15.65%, respectively. The chemical control and diffusion control by shrinking core models are well fitted as the kinetic models representing the dissolution of the minerals. The respective activation energies for copper and cobalt dissolution of 10.92 and 31.023 kJ mol−1 for the chemical control and 18.83 and 37.28 kJ mol−1 for diffusion reaction control were established from temperature-based experiments.

Original languageEnglish
Pages (from-to)2209-2219
Number of pages11
JournalMining, Metallurgy and Exploration
Issue number5
Publication statusPublished - Oct 2022


  • Carrolite
  • Chalcocite
  • Dissolution
  • Kinetic models
  • Sulfate–chloride media

ASJC Scopus subject areas

  • Control and Systems Engineering
  • General Chemistry
  • Geotechnical Engineering and Engineering Geology
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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