Chloride Removal from Industrial Soils and Zinc Slag in Zinc Production Factories by Sodium Metabisulfite and Copper(II) Sulfate

  • Arezoo RahmaniEmail author
  • Davood Moradkhani
  • Elahe Karami
  • Abasat Rahmani
  • Seyed Kamal Mousavinezhad
Technical Paper


The present study attempts to investigate the chloride removal from industrial soils and zinc slag in zinc production companies. The presence of chloride in factory’s samples causes some problems such as the anode erosion in electrolysis cells, negative effects on the quality of zinc sheets, and reducing the quality of product. Having said that, decreasing the amount of chloride ion will make it possible to produce zinc sheets with SHG quality. There are different methods that can be used to decrease the amount of chloride ion, and one of them has been practiced in this study. A hydrometallurgy method uses sodium metabisulfite and copper(II) sulfate in which Cl reacts with Cu+ to form CuCl precipitate and removes the chloride content. The parameters pH, temperature, time, and the consumed ratio of copper(II) sulfate to sodium metabisulfite were investigated. Once optimal values of these parameters were calculated, the efficiency of chloride removal from NaCl solution with a value of 57% and the obtained solution from slag leach with a value of 2.6% were evaluated as inefficient.


Chloride removal Industrial soils and zinc slag Hydrometallurgy method 


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Copyright information

© The Indian Institute of Metals - IIM 2019

Authors and Affiliations

  • Arezoo Rahmani
    • 1
    • 2
    Email author
  • Davood Moradkhani
    • 2
  • Elahe Karami
    • 3
  • Abasat Rahmani
    • 1
  • Seyed Kamal Mousavinezhad
    • 4
  1. 1.Research and Development Unit of Calcimin CompanyZanjanIran
  2. 2.Faculty of EngineeringUniversity of ZanjanZanjanIran
  3. 3.Faculty of EngineeringImam Khomeini International UniversityQazvinIran
  4. 4.School of Mining EngineeringUniversity of TehranTehranIran

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