Efficiencies of electrolytic treatment of complexed metal solutions in a stirred cell having a membrane separator

Ruey Shin Juang*, Li Chun Lin

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

14 Scopus citations

Abstract

Electrolytic recovery of metals such as Cu(II) and strong chelating agents such as EDTA (ethylenediaminetetraacetic acid) from their equimolar complexed solutions was investigated in a stirred cell having a membrane separator. The iridium oxide coated on titanium (IrO2/Ti) was used as the anode. Experiments were performed as a function of membrane-type (Neosepta CM-1 and CM-2), current density (18.5-185A/m2), cathode material (Pt plate, Pt/Ti, Cu plate, stainless steel), initial catholyte pH (1-9) and initial Cu-EDTA chelate concentration (0.01-0.08M), and initial anolyte NaNO3 concentration (0.1-0.8M). An economically feasible current efficiency (>60%) and metal recovery (>95%) could be obtained if the Cu-EDTA chelate concentration was sufficiently high. Electrodeposition of other divalent metals including Pb, Hg, and Cd onto Pt/Ti cathode from their EDTA solutions was possible, but no apparent deposition of Co, Ni, Zn, and Mn was observed. Copyright (C) 2000 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)19-29
Number of pages11
JournalJournal of Membrane Science
Volume171
Issue number1
DOIs
StatePublished - 15 06 2000
Externally publishedYes

Keywords

  • Complexed metal solutions
  • Current efficiency
  • Electrolytic treatment
  • Membrane separator
  • Metal recovery

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