Abstract
Cd and Zn were separated from Co, from chloride solutions containing 16 different metal ions. The separation method used was liquid–liquid extraction. Two different chloride concentrations, 0.5 and 5 mol/kg, were tested. Aliquat 336 in toluene was used as extractant. It is shown that Li2SO4 can back-extract the metals. Distribution ratios were determined using radiotracers or inductively coupled plasma mass spectrometry. The results of these methods are compared. In particular, we demonstrate that the determination of low distribution ratios are limited by the uncertainty of the measured concentration of the feed solution.
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Acknowledgements
Open access funding provided by University of Oslo (incl Oslo University Hospital). The authors are grateful for the financial support from the Norwegian Research Council and industry companies Yara International, Glencore Nikkelverk, and Boliden Odda. The support was channelled through Norwegian Research Council project BIA-KPN project number 2366741. Thanks to Eddy Walter Hansen and Ørnulf Borgan for discussion regarding the statistics.
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Lerum, H.V., Sand, S., Eriksen, D.Ø. et al. Comparison of single-phase and two-phase measurements in extraction, separation and back-extraction of Cd, Zn and Co from a multi-element matrix using Aliquat 336. J Radioanal Nucl Chem 324, 1203–1214 (2020). https://doi.org/10.1007/s10967-020-07168-8
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DOI: https://doi.org/10.1007/s10967-020-07168-8