Solubility of Palladium in Alumina-Iron Silicate Melts
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2021-06
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en
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7
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JOM, Volume 73, issue 6, pp. 1871-1877
Abstract
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.Description
Funding Information: Financial support by CMEco (Grant # 7405/31/2016) and SYMMET (Grant # 3891/31/2018) programs of Business Finland are gratefully acknowledged. Additional funding from the Alfred Kordelin Foundation, Finnish Cultural Foundation as well as the Emil Aaltonen Foundation (KA), and the Finnish Steel and Metals Producers’ Fund (LK) is also appreciated. The EPMA measurements were carried out by Mr. Lassi Pakkanen of the Geological Survey of Finland. This study utilized the Academy of Finland’s RawMatTERS Finland Infrastructure (RAMI) housed at Aalto University, GTK and VTT. Publisher Copyright: © 2021, The Author(s). Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
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Avarmaa, K, Klemettinen, L, O’Brien, H, Jokilaakso, A, Lindberg, D & Taskinen, P 2021, ' Solubility of Palladium in Alumina-Iron Silicate Melts ', JOM, vol. 73, no. 6, pp. 1871-1877 . https://doi.org/10.1007/s11837-021-04672-4