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  • Author or Editor: B. Kubica x
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Abstract  

The extraction of actinium with HDEHP from Cl and NO 3 systems has been investigated. It was found that extraction of actinium from HCl solutions is much better than from HNO3 solutions. Stability constants of the actinium complexes Ac(X)2+, X=Cl or NO 3 , were determined. Our results show that actinium formed less stable complexes with Cl than with NO 3 ligands.

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Abstract  

The extraction of actinium by HDEHP solutions in n-heptane as a function of mineral acids and some lanthanides (Ln) in the aqueous phase has been studied. It was found that the actinium extraction coefficient in the absence of Ln decreased linearly with acid concentration with the slope of –3 in the whole investigated range of its concentration. In the presence of Ln the extraction coefficient decreased with a smaller slope than in the absence of Ln. This slope decreased with the Ln salt concentration. The extraction coefficient of Ac decreased with a slope of –3 at acid concentrations above 0.1N, regardless of the Ln concentration in the extraction system.

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Abstract  

Sorption coefficients of Hf, Zr and Nb on nickel-potassium hexacyanoferrate(II) (NF), nickel hexacyanoferrate(II) composite ion exchanger (NCF) and on the ion exchange resins (Dowex-1 and Dowex-50) from inorganic acids solutions were determined. The results obtained indicate that hafnium, zirconium and niobium in dilute sulphuric and hydrochloric acids form anionic and cationic complexes which sorbed on the ion exchangers studied.

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Abstract  

Sorption studies of Ra, Ba, Fr and Cs on nickel hexacyanoferrate(II) composite ion exchanger from hydrochloric acid and EDTA solutions are presented.

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Summary  

The amount and dislocation of the gamma-radionuclides (artificial cesium and natural potassium) in the Haplic podsol profiles of the Tatra Mountains have been described. These soils belong to the group of penetrable formations what is a result of their texture. They provide a good example of percolation and sorption possibilities of the radionuclides within the soil profile. The highest concentration of radionuclides has been detected in raw humus and spodic (illuvial humus-iron) layers, at the surface.

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Abstract  

Trace element analysis is one of the most important field in analytical chemistry. There are several instrumental techniques which are applied for determinations of microscopic elemental content. The PIXE (Proton Induced X-ray Emission) technique is one of the nuclear techniques that is commonly applied for such purpose due to its multielemental analysis possibilities. The aim of this study was to establish the optimal conditions for target preparation procedure. In this paper two different approaches to the topic are presented and widely discussed.1,2 The first approach was the traditional pellet technique and the second one was mineralization procedure. For the analysis soft tissue such as liver was used. Some results are also presented on water samples

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Abstract  

Sorption coefficients of Hf and Nb on cupric hexacyanoferrate and zinc hexacyanoferrate from inorganic acid solutions were determined. The results indicate that hafnium and niobium in sulphuric and hydrochloric acids form anionic and cationic complexes which are absorbed on the examined ion exchangers.

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Abstract  

The ion-exchange behavior of Ba and Sr on nickel-potassium hexacyanoferrate(II) (NiNF), cobalt-potassium hexacyanoferrate(II) (CoNF), cupric-potassium hexacyanoferrate(II) (CuNF) , zinc-potassium hexacyanoferrate(II) (ZnNF) and the ion exchange resin Dowex-50 has been studied in sulphuric acid solutions. 0.05M H2SO4 was used for continuous on-line separation of short-lived Ba and Sr isotopes produced at the M-25 at FLNR microtron, JINR, Dubna. The radionuclide of Ba was sorbed strongly on NiNF, CoNF, CuNF, ZnNF and on Dowex-50 while Sr was sorbed very well on Dowex-50.

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Abstract  

A method for deep decontamination of high spin178m2Hf isomer from microquantities of Sc, Fe, Co, Ni, Sb and Ag was elaborated using ion exchange separation on Dowex-1 in Hf and CH3COOH–HCl media.

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