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Journal of Radioanalytical and Nuclear Chemistry

, Volume 265, Issue 3, pp 431–439 | Cite as

Adsorption and desorption of Am(III) on calcareous soil and its parent material

  • Li Weijuan
  • Zhang Fuming
  • Tao Zuyi
Article

Summary

The adsorption and desorption of Am(III) on a calcareous soil (sierozem) and its parent material (loess) were studied by batch technique. The molarities of the Am(III) aqueous solutions were less than 5 . 10-9 mol/l. High adsorbability was found of Am(III) on the calcareous soil and its parent material. In order to decrease the adsorption and, hence, to investigate the adsorption characteristics properly, stable Eu3+ as hold back carrier and analogue was added to the aqueous solution. The relative contributions of CaCO3, organic matter (OM) to the Am(III) adsorption on calcareous soil and its parent material were investigated. The adsorption and desorption isotherms of Am(III) on untreated soil and loess and the   three kinds of treated soils and three kinds of treated loesses to remove CaCO3, OM and both CaCO3 and OM were determined, respectively. It was found that all isotherms were linear, the average distribution coefficients (K-d) for the untreated soil and for the untreated loess were almost equal, while there was an obvious difference between the values of the average distribution coefficients (K-d) for the treated soil and the treated loess to remove CaCO3 or OM. The adsorption-desorption hysteresis on the untreated and treated soils and loesses actually occurred and there was an obvious difference between the hysteresis coefficients on both the corresponding treated soil and loess. It can be concluded that the adsorbability of Am(III) on calcareous soil is similar to that on its parent material, and that the contributions of CaCO3 and OM to the Am(III) adsorption by the untreated soil are different from those by the untreated parent material.

Keywords

Calcareous Physical Chemistry Organic Matter Aqueous Solution Inorganic Chemistry 
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 2005

Authors and Affiliations

  • Li Weijuan
    • 1
  • Zhang Fuming
    • 2
  • Tao Zuyi
    • 3
  1. 1.Radiochemistry Laboratory, College of Chemistry and Chemical Engineering, Lanzhou University
  2. 2.Radiochemistry Laboratory, College of Chemistry and Chemical Engineering, Lanzhou University
  3. 3.Radiochemistry Laboratory, College of Chemistry and Chemical Engineering, Lanzhou University

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