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

F. Elgersma; G. J. Witkamp; G. M. van Rosmalen

doi:10.1016/0304-386X(93)90012-3

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 journal › Article › peer-review

19 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 language	English (US)
Pages (from-to)	165-176
Number of pages	12
Journal	Hydrometallurgy
Volume	33
Issue number	1-2
DOIs	https://doi.org/10.1016/0304-386X(93)90012-3
State	Published - Jun 1993
Externally published	Yes

ASJC Scopus subject areas

Metals and Alloys
Materials Chemistry
Industrial and Manufacturing Engineering

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10.1016/0304-386X(93)90012-3

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title = "Kinetics and mechanism of reductive dissolution of zinc ferrite in H2O and D2O",

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.",

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year = "1993",

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AU - Elgersma, F.

AU - Witkamp, G. J.

AU - van Rosmalen, G. M.

PY - 1993/6

Y1 - 1993/6

N2 - 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.

AB - 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.

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

Abstract

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