Production of ultrahigh purity copper using waste copper nitrate solution

J. Y. Choi, D. S. Kim

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


The production of ultrahigh purity copper (99.9999%) by electrolysis in the presence of a cementation barrier has been attempted employing a waste nitric copper etching solution as the electrolyte. The amount of copper deposited on the cathode increased almost linearly with electrolysis time and the purity of copper was observed to increase as the electrolyte concentration was increased. At some point, however, as the electrolyte concentration increased, the purity of copper decreased slightly. As the total surface area of cementation barrier increased, the purity of product increased. The electrolyte temperature should be maintained below 35°C in the range of investigated electrolysis conditions to obtain the ultrahigh purity copper. Considering that several industrial waste solutions contain valuable metallic components the result of present study may support a claim that electrowinning is a very desirable process for their treatment and recovery.

Original languageEnglish
Pages (from-to)147-158
Number of pages12
JournalJournal of Hazardous Materials
Issue number2
StatePublished - 25 Apr 2003

Bibliographical note

Funding Information:
This work was funded by a grant (BK-21) from the Ministry of Education of the Korean government.


  • Cementation barrier
  • Electrolysis
  • Electrowinning
  • Highly pure copper
  • Waste etching solution


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