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Adsorption of uranium on halloysite

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Published/Copyright: September 25, 2009
Radiochimica Acta
From the journal Radiochimica Acta Volume 90 Issue 3

Summary

Adsorption of uranium (U(VI)) from aqueous solutions on halloysite type clay was studied as a function of amount of adsorbent, initial concentration and pH. The values of adsorption data were fitted to Freundlich, Langmuir and Dubinin–Radushkevich (D–R) adsorption isotherms. The mean energy of adsorption was calculated as 5.91 kJ/mol from D–R adsorption isotherm. Lagergren and Bangham equation has been used for dynamic modelling of process and the rate constants of adsorption of uranium on halloysite type clay were calculated at 293, 313 and 333 K. In order to explain the mechanism of adsorption reaction, the rate constants were calculated at high and low uranium concentrations. Adsorption reaction was studied at 293, 303, 313, 323 and 333 K for halloysite type clay and also thermodynamic constants have been calculated. The results show that the adsorption reaction was endothermic and more spontaneous at high temperature.

Received: 2001-2-2
Accepted: 2001-10-26
Published Online: 2009-9-25
Published in Print: 2002-3-1

© Oldenbourg Wissenschaftsverlag, München

Articles in the same Issue

  1. Fission neutron spectrum averaged cross sections of some threshold reactions on titanium: production feasibility of 45Ti in a nuclear reactor
  2. Chemical isolation of dubnium (element 105) in fluoride media
  3. Direct separation of plutonium by thermochromatography from environmental samples
  4. Studies on the supercritical fluid extraction of uranium from tissue matrix
  5. Study of uranyl(VI) malonate complexation by time resolved laser-induced fluorescence spectroscopy (TRLFS)
  6. Adsorption of uranium on halloysite
  7. Studies on hydrolysis and radiolysis of N,N,N′,N′-tetraoctyl-3-oxapentane-1,5-diamide
  8. Production of the positron emitter 51Mn via the 50Cr(d, n) reaction: targetry and separation of no-carrier-added radiomanganese
  9. Chromatographic separation of lithium and magnesium isotopes by manganese(IV) oxide
https://doi.org/10.1524/ract.2002.90.3_2002.155

Articles in the same Issue

  1. Fission neutron spectrum averaged cross sections of some threshold reactions on titanium: production feasibility of 45Ti in a nuclear reactor
  2. Chemical isolation of dubnium (element 105) in fluoride media
  3. Direct separation of plutonium by thermochromatography from environmental samples
  4. Studies on the supercritical fluid extraction of uranium from tissue matrix
  5. Study of uranyl(VI) malonate complexation by time resolved laser-induced fluorescence spectroscopy (TRLFS)
  6. Adsorption of uranium on halloysite
  7. Studies on hydrolysis and radiolysis of N,N,N′,N′-tetraoctyl-3-oxapentane-1,5-diamide
  8. Production of the positron emitter 51Mn via the 50Cr(d, n) reaction: targetry and separation of no-carrier-added radiomanganese
  9. Chromatographic separation of lithium and magnesium isotopes by manganese(IV) oxide
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