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Article
Electrolytic Recovery of Bismuth and Copper as a Powder from Acidic Sulfate Effluents using an emew® Cell
RSC Advances
  • Wei Jin
  • Paul I. Laforest
  • Alex Luyima
  • Weldon Read
  • Luis M. Navarro
  • Michael S. Moats, Missouri University of Science and Technology
Abstract

Effective removal of bismuth is a primary concern during copper electrorefining. A novel electrowinning process using an emew® cell was developed to recover bismuth and copper from a copper electrorefining waste stream. Significant removal and co-deposition of copper and bismuth were achieved from a highly acidic sulfate industrial effluent using a current density of 350 A m-2, but the current efficiency was low (27%). Operating at a lower current density (75 A m-2) facilitated the preferred removal of Cu, while increasing current efficiency to 67.4% due to the decrease of aside-reaction. Consequently, a two-stage process was employed to remove most of the copper at low current and then extract bismuth at high current. 93.4% of the bismuth and 97.8% of the copper were recovered with a satisfactory current efficiency, and a high purity (~98%) Bi powder was obtained in the second step. This novel emew® cell approach may serve as a promising alternative for recovering copper and bismuth, and the proposed two step strategy may offer insight for the selective recovery of metals in a multi-component system.

Department(s)
Materials Science and Engineering
Keywords and Phrases
  • Bismuth,
  • Efficiency,
  • Effluents,
  • Metal recovery,
  • Molecular biology,
  • Powder metals,
  • Recovery,
  • Sewage,
  • Copper electrorefining,
  • Current efficiency,
  • Effective removals,
  • Electrolytic recovery,
  • Industrial effluent,
  • Multi-component systems,
  • Selective recovery,
  • Two-stage process
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2015 Royal Society of Chemistry, All rights reserved.
Publication Date
6-1-2015
Publication Date
01 Jun 2015
Citation Information
Wei Jin, Paul I. Laforest, Alex Luyima, Weldon Read, et al.. "Electrolytic Recovery of Bismuth and Copper as a Powder from Acidic Sulfate Effluents using an emew® Cell" RSC Advances Vol. 5 Iss. 62 (2015) p. 50372 - 50378 ISSN: 2046-2069
Available at: http://works.bepress.com/michael-moats/12/