Kinetics and mechanism of reductive dissolution of zinc ferrite in H2O and D2O

F. Elgersma*, G. J. Witkamp, G. M. van Rosmalen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Synthetic zinc ferrite (ZnO·Fe2O3) samples were dissolved in 1 M HClO4 solutions with dissolved Fe(ClO4)2 at 90°C. The dissolution rate of ZnO·Fe2O3 was dependent upon the Fe2+ concentration, with an order of 0.43±0.03. It was shown that equivalent leach experiments carried out in D2O and H2O in the presence of 5 g/l Fe2+ resulted in a dissolution rate which was twice as high in H2O as in D2O. In 0.5 M H2SO4 at 90°C, in the absence of Fe2+ ions, the rate constant for ZnO·Fe2O3 dissolution was 11% higher in H2O than in D2O. A mechanism is proposed which describes the dissolution of ZnO·Fe2O3 in the presence and in the absence of complexing or reducing agents in H2O or D2O.

Original languageEnglish (US)
Pages (from-to)165-176
Number of pages12
JournalHydrometallurgy
Volume33
Issue number1-2
DOIs
StatePublished - Jan 1 1993
Externally publishedYes

ASJC Scopus subject areas

  • Metals and Alloys
  • Industrial and Manufacturing Engineering
  • Materials Chemistry

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