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Journal of Radioanalytical and Nuclear Chemistry

, Volume 267, Issue 2, pp 389–395 | Cite as

Kinetics and thermodynamics of the sorption of uranium and thorium ions from nitric acid solutions onto a TBP-impregnated sorbent

  • M. W. Abdel Raouf
  • A. M. El-Kamash
Article

Summary

Kinetics and equilibrium studies on the sorption of uranium and thorium ions were carried out from nitric acid solutions by tri-n-butyl phosphate (TBP) loaded supported sorbent, commercially known as Egy-Sorb, using batch technique. Analysis of the rate data in accordance with three kinetic models revealed that the particle diffusion process was the rate determining mechanism and the sorption process of the metal ions onto impregnated sorbent follows first order reversible kinetics. The values of the first order rate constants, the rate constants of intraparticle transport, and the particle diffusion coefficients for the uranium and thorium ions were determined from the graphical representation of the proposed models. Experimental isotherms of both ions were successfully fit to Langmuir and Freundlich isotherm models over the entire concentration range studied. The effect of temperature on the equilibrium distribution values has been utilized to evaluate the changes in standard thermodynamic quantities.

Keywords

Uranium Isotherm Model Nitric Acid Solution Order Rate Constant Experimental Isotherm 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag/Akadémiai Kiadó 2006

Authors and Affiliations

  • M. W. Abdel Raouf
    • 1
  • A. M. El-Kamash
    • 2
  1. 1.Hot Laboratory Center, Atomic Energy Authority
  2. 2.Hot Laboratory Center, Atomic Energy Authority

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