Recovery of uranium, thorium and zirconium from allanite by extraction chromatography using impregnated chromosorb

Gupta, Bharat; Malik, Poonma; Irfan, Zareena Begum

doi:10.1016/j.wri.2013.11.002

Cited by 9 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further decrease in ratio of hafnium to zirconium to 0.18x10 -3 and 0.15x10 -3 occurred for anion exchange chromatography and in PPt-D by fractional precipitation at pH 3.0 respectively. This agrees with those reported by others [25,26].…”

Section: Fractional Precipitationsupporting

confidence: 94%

“…However, Zr concentration in the eluted HCl fraction represents 99.9%, while the total interfered metals with Zr loaded onto the column resin were insignificant with concentration value below 0.1%. Furthermore, the extraction chromatography (Dowex-1x2) used herein is comparable with that used for separation of Zr in allanite sample contain Th(IV) and U(VI) [25].…”

Section: Anion Exchange Chromatographymentioning

confidence: 97%

See 1 more Smart Citation

Extraction chromatography and fractional precipitation procedures for production various zirconium grades for industrial and nuclear interest from Egyptian zircon ore

Abdelsamad

Attallah

Afifi

et al. 2021

Arab Journal of Nuclear Sciences and Applications

View full text Add to dashboard Cite

The present study describes purification of zirconium from hafnium from the Egyptian zircon ore, by selective leaching, successive precipitations and two analytical techniques. The obtained results indicated that three fractions of Zr-concentrates were obtained by selective precipitation of the leached solution, namely: PPt-A, PPt-B and PPt-C. In the precipitation process, the PPt-B fraction, Zr exists with actinides (U and Th) and less than 0.002% of the original hafnium in the mother solution. This zirconium fraction, PPt-B, was further purified by fractional precipitation or anion exchange chromatography. The purity of Zr obtained by both methods reached 99%. Meanwhile, recoveries were varied between 64% by fractional precipitation and 95% by anion exchange chromatography. The ratio of Hafnium to zirconium was 24 x 10-3 in original Egyptian zircon concentrate. This ratio decreased to 17x10-3, 2.17x10-3, and 3.52x10-3 for PPt-A, PPt-B and PPt-C fractions respectively. Further decrease in ratio of hafnium to zirconium to 0.18x10-3 and 0.15x10-3 occurred for anion exchange chromatography and fractional precipitation techniques.

show abstract

Section: Fractional Precipitationsupporting

confidence: 94%

Section: Anion Exchange Chromatographymentioning

confidence: 97%

Extraction chromatography and fractional precipitation procedures for production various zirconium grades for industrial and nuclear interest from Egyptian zircon ore

Abdelsamad

Attallah

Afifi

et al. 2021

Arab Journal of Nuclear Sciences and Applications

View full text Add to dashboard Cite

show abstract

“…Uranium and thorium are essential nuclear fuel elements; the interests for these components have expanded tremendously and also have found potential in the fields of super conductors, rechargeable batteries, propelled earthenware production and fibre optics. 1 The groundwater and some sources of surface water have been contaminated by the radioactive uranium and thorium ions, which cause harm to the ecosystem, environment and human health. 2 At different pH ranges, uranium and thorium in solution exist in a complexed form.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of uranium and thorium metal ion adsorption by gum ghatti grafted poly(acrylamide) copolymer composites

Shelar-Lohar

Joshi

2019

RSC Adv.

View full text Add to dashboard Cite

Uranium and thorium ions were selectively removed from aqueous solution using synthesized gum ghatti grafted poly(acrylamide) gum-g-poly(AAm) composite. A gamma radiation induced free radical copolymerization technique was used to synthesize the copolymer composite of gum-g-poly(AAm).Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TG), X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) were used to characterize the graft copolymer gum-g-poly(AAm). The adsorption of uranium ions and thorium ions using the gum-g-poly(AAm) copolymer composites has been investigated in batch mode. The adsorptive characteristics were investigated by varying the pH, concentration and time for both ions. The adsorption method depends on the pH of each metal ion, and the highest adsorption percentage was achieved at pH 6.0. The adsorption statistics were justified by isotherm, kinetic and thermodynamic models. The Langmuir adsorption model was revealed to be the best fitted monolayer arrangement, with a maximum adsorption capacity of 367.65 mg g À1 for the uranium ions and 125.95 mg g À1 for the thorium ions. The adsorption of metal ions occurred by the ion exchange process, which was specified through the rate controlling step with a best-fitted pseudo-second order kinetic rate model. Thermodynamic analysis shows that the DH and DS values for the uranium ions and thorium ions were positive. The negative DG values decreased with an increase in temperature, suggesting that the metal ion adsorption process was endothermic and spontaneous in behaviour. Fig. 8 Kinetics model (a) pseudo-first order, (b) pseudo-second order, and (c) Weber Morris model. 41332 | RSC Adv., 2019, 9, 41326-41335 This journal is

show abstract

Study of scandium and thorium sorption from uranium leach liquors

Smirnov

Titova

Рычков

et al. 2017

J Radioanal Nucl Chem

View full text Add to dashboard Cite

Recovery of uranium, thorium and zirconium from allanite by extraction chromatography using impregnated chromosorb

Cited by 9 publications

References 10 publications

Extraction chromatography and fractional precipitation procedures for production various zirconium grades for industrial and nuclear interest from Egyptian zircon ore

Extraction chromatography and fractional precipitation procedures for production various zirconium grades for industrial and nuclear interest from Egyptian zircon ore

Comparative study of uranium and thorium metal ion adsorption by gum ghatti grafted poly(acrylamide) copolymer composites

Study of scandium and thorium sorption from uranium leach liquors

Contact Info

Product

Resources

About