Separation of palladium from simulated intermediate radioactive waste/chloroacetic acid/nitrate medium by IRA-410 and IRA-900 anion exchangers
01 Feb 2002-Journal of Radioanalytical and Nuclear Chemistry (Akadémiai Kiadó, co-published with Springer Science+Business Media B.V., Formerly Kluwer Academic Publishers B.V.)-Vol. 251, Iss: 2, pp 285-292
TL;DR: In this paper, a column technique was used to extract palladium from the [ILLW] solution using the column technique and the selectivity increased by using chloroacetic acid/nitrate than in nitrate medium.
Abstract: Separation of palladium by strongly basic anion exchangers IRA-110 and IRA-900 from intermediate radioactive liquid waste in chloroacetic acid/nitrate medium containing thirteen elements have been achieved. Different conditions have been studied, the effect of NaNO3 as salt content, chloroacetic acid and hydrogen ion concentration have been investigated. Selective recovery of palladium from the [ILLW] solution was achieved using the column technique. The selectivity increased by using chloroacetic acid/nitrate than in nitrate medium. The elution of palladium was carried out via reduction with formic acid where the rate of the reduction process was increased by decreasing the formic acid concentration till 50% followed by dissolving the separated palladium by nitric acid.
Citations
More filters
TL;DR: In this article, the growth and decay of chronocurrents measured for palladium deposition has been found to follow the instantaneous nucleation model with three-dimensional growth of nuclei.
67 citations
TL;DR: This review describes the basic types of available sorbents, preconcentration procedures and preparations of the sorbent to the subsequent determination of noble metals and specific features of instrumental techniques and examples of ETAAS, FAAS, I CP-AES, ICP-MS determinations after the sorption preconcentrations are considered.
Abstract: Nowadays much attention is being paid to the determination of trace amounts of noble metals in geological, industrial, biological and environmental samples. The most promising techniques, such as inductively coupled plasma atomic emission spectrometry (ICP-AES), inductively coupled plasma mass spectrometry (ICP-MS) and electrothermal atomic absorption spectrometry (ETAAS) are characterized by high sensitivity. However, the accurate determination of trace noble metals has been limited by numerous interferences generated from the presence of matrix elements. To decrease, or eliminate, these interferences, the sorption preconcentration of noble metals is often used prior to their instrumental detection. A great number of hyphenated methods of noble metal determination using sorption preconcentration have been developed. This review describes the basic types of available sorbents, preconcentration procedures and preparations of the sorbent to the subsequent determination of noble metals. The specific features of instrumental techniques and examples of ETAAS, FAAS, ICP-AES, ICP-MS determinations after the sorption preconcentration of noble metals are considered. The references cited here were selected mostly from the period 1996 - 2006.
51 citations
TL;DR: In this article, Imidazolium nitrate functional groups were anchored onto a polystyrene-divinylbenzene resin matrix, and investigated for the extraction of palladium (II) from nitric acid medium.
38 citations
TL;DR: Combined methods for the determination of noble metals with the use of sorption preconcentration with complexing, anion exchange, and other sorbents are reviewed in this article.
Abstract: Combined methods for the determination of noble metals with the use of sorption preconcentration with complexing, anion-exchange, and other sorbents are reviewed. Characteristics of sorbents, techniques of sorption preconcentration, and techniques for the preparation of a concentrate for determination are considered. Features of instrumental methods for the determination of noble metals in the analysis of different materials are discussed. Examples of the use of sorption preconcentration in combined methods for the determination of noble metals are given from publications between 1996–2005.
37 citations
01 Jan 2013
TL;DR: A novel ion selective IRA-410 membrane disc sensor for Pd (II) ions has been prepared and studied in this paper, which has a fast response time (<1 s) and good selectivity with respect to different metal ions.
Abstract: A novel ion selective IRA-410 membrane disc sensor for Pd (II) ions has been prepared and studied. This electrode has a wide linear dynamic range from 10-1 to 2.5×10-6 mol-1 with a Nernstian slope of 16.5 ± 0.2 mV decade-1 and low detection limit of 1.6×10-6 mol l-1. It has a fast response time (<1 s) and good selectivity with respect to different metal ions. IRA-410 based electrode was suitable for aqueous solutions of pH range from (1.0- 9.0). It can be used for about 10 months with complex with Pd (II) was calculated by using segmented sandwich membrane method. The formation constant of ionophore of IRA-410 and its Pd (II)-Complex is examined using Fourier-transform infrared analysis and elemental analysis techniques. The proposed electrode has been used successfully as an indicator electrode in potentiometric determination in aqueous nitrate and /or chloride media.
1 citations
Cites methods from "Separation of palladium from simula..."
...To explain the reduction steps of palladium chloride by formic acid, the reduction using ethylene was consulted [2] in comparison to the following reduction reaction case....
[...]
...The elution of palladium was carried out via reduction with formic acid [1-3] where the rate of the reduction process was increased by decreasing...
[...]
References
More filters
TL;DR: In this article, the adsorption of Pd(II) and Au(III) on the Duolite GT-73 has been investigated, and the results obtained in chloride media showed a higher adsoreption for Au (III) (0.58±0.03mmol/g resin) than for Pd (II) ( 0.262± 0.015mmol /g resin).
121 citations
TL;DR: In this article, an integrated scheme for the determination of five noble metals, combining solvent extraction procedures with atomic absorption spectrometric finishes, is described, which comprises an initial extraction of gold, a simultaneous extraction of platinum and palladium as iodides, and a subsequent simultaneous extraction and preconcentration of rhodium and indium as their 2-mercaptobenzothiazolϵ complexes.
26 citations
TL;DR: Photometric procedures have been developed for the determination of Pd(II), Os(VIII) and Ru(III) with the same reagent that allows the enrichment of PD(II) and Au( III) at the trace level from a large volume of aqueous medium even in the presence of base metals.
17 citations
TL;DR: In this article, a batch technique was used to recover palladium from [ILLW] solutions containing numbre of elements using column technique and the elution of palladium was carried out via reduction with formic acid where the rate of the reduction process was increased by decreasing the formic acids concentration till 50% followed by dissolving the separated palladium by nitric acid.
Abstract: Selective efficient method have been for separation of palladium by strong basic anion exchangers IRA-410 and IRA-900 from intermediate radioactive nitrate medium. The different conditions for exchange behaviour of palladium from [ILLW] solutions containing numbre of elements were investigated by batch technique. Selective recovery of palladium from the [ILLW] solution was achieved using column technique. The elution of palladium was carried out via reduction with formic acid where the rate of the reduction process was increased by decreasing the formic acid concentration till 50% followed by dissolving the separated palladium by nitric acid.
9 citations