Separation of palladium(II) from mixtures of non-ferrous metal ions by solvent extraction
Journal Title: Challenges of Modern Technology - Year 2016, Vol 7, Issue 1
Abstract
The possibility of Pd(II) ions separation from mixtures of Co(II), Ni(II), Cu(II) and Pd(II) ions by solvent extraction was studied, using 1-hexyl-2- methylimidazole in chloroform as the extractant. The initial concentration of each ion was 10 mM. The tests were carried out at a temperature of 25°C, at a constant strength of the aqueous solution of I = 0.5, as maintained by the KCl solution. It was demonstrated that differences in the stability and structure of their coordination sphere as well as solubility of complexes with the extractant could be used for separating the Co(II), Ni(II), Cu(II) and Pd(II) ions by solvent extraction. Pd(II), which forms flat-square complexes in the solutions, passes easily into the organic phase and is easier separated from the mixture of Co(II), Ni(II), Cu(II) ions, which form octahedral or tetrahedral complexes. Extraction percentages were calculated. For the respective metals, their values increase for increasing concentrations of the extractant in the aqueous phase. The extraction percentage decreases in the following order: Pd(II) > Cu(II) > Co(II) > Ni(II). In the case of the quaternary mixture, the highest extraction percentage for Pd(II) (70%) was obtained at a pH=7.33. Separation coefficients were also calculated. The highest separation coefficients were obtained for the system: Pd(II)/Ni(II), Pd(II)/Co(II); at a pH of 5.4 for an aqueous solution, their values are 13.3 and 7.7, respectively.
Authors and Affiliations
Elżbieta Radzyminska-Lenarcik, Katarzyna Witt
Keywords
Related Articles
- EP ID EP199180
- DOI -
- Views 87
- Downloads 0
Experimental and modelling analysis of the separation of ionic salts solution in nanofiltration process
This paper presents the possibility of the use of Donnan and Steric Partitioning Pore Model (DSPM) based on the extended Nernst-Planck equation for interpretation of the separation of chromium(III) and chloride ions from...
Magnetocaloric effect in Ni-Mn-X Heusler alloys
Effect of replacement of Ga by Sn for two Ni-rich Heusler alloys series: Ni50Mn25+aX25-a (a=0; 2.3; 4.2; 5.8; 7.15; 8.35), with X= Ga, Sn, and its influence on the magnetocaloric properties of the alloys, were studied. T...
The effect of the heat treatment on the 7CrMoVTiB10-10 steel's microstructure and its properties
According to the European Standard PN-EN 10216-2 two types of the heat treatment could apply to 7CrMoVTiB10-10 – the modern bainitic boiler steel. The 7CrMoVTiB10-10 steel may have different properties, depending on the...
Public participation in planning in the Egyptian context
Public participation is a critical aspect in the planning, also spatial planning. Its role is changing dramatically as it is present not only in social development but also tackles issues connected with cultural, educati...
Towards the reuse of materials in Polish architecture. Working in the post-socialist context
The article provides a discussion on how socialism, its aesthetics and architecture have influenced contemporary architecture in Poland, especially the choices of materials and aesthetics present in Polish society. The a...