Solubility of Palladium in Alumina-Iron Silicate Melts

Katri Avarmaa, Lassi Klemettinen, Hugh O’Brien, Ari Jokilaakso, Daniel Lindberg, Pekka Taskinen*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Dissolution and solubility of palladium in iron silicate melts saturated with alumina–iron spinel at 1300°C has been measured using an equilibration-drop quenching technique combined with electron probe microanalysis and laser ablation–inductive coupled plasma–mass spectrometry analysis from polished sections. Composition of the resulting Fe-Pd alloy allowed estimation of the activity of palladium at different oxygen partial pressures, and, thus, the solubilities of palladium in the studied slags in conditions typical of copper and nickel smelting as well as slag cleaning at pO2=10-5 to 10-10 atm. The mechanism of palladium dissolution in the studied iron silicate slags was oxidation by formation of the monovalent oxide species PdO0.5 over the entire oxygen activity range of this study. Testing the applicability of the various palladium isotopes for quantitative analyses of Pd in these types of matrices resulted in a good fit of measured concentrations of 104Pd and 105Pd with interference-corrected 106Pd and 108Pd.

Original languageEnglish
Pages (from-to)1871-1877
Number of pages7
Issue number6
Early online date23 Apr 2021
Publication statusPublished - Jun 2021
MoE publication typeA1 Journal article-refereed


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