Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-08T05:32:09.739Z Has data issue: false hasContentIssue false
  • English
  • Français

Behavior of Uranium(VI) during HEDPA Leaching for Aluminum Dissolution in Tank Waste Sludges

Published online by Cambridge University Press:  26 February 2011

Brian Anthony Powell ,
Linfeng Rao ,
Kenneth L. Nash  and
Leigh Martin
Brian Anthony Powell
Affiliation:
[email protected], Lawrence Berkeley National Laboratory, Chemical Sciences Division, One Cyclotron Road, Mailstop 70A-1150, Berkeley, CA, 94720, United States, (510) 486-5377, (510) 486-5596
Linfeng Rao
Affiliation:
[email protected], Lawrence Berkeley National Laboratory, Chemical Sciences Division, United States
Kenneth L. Nash
Affiliation:
[email protected], Washington State University, Department of Chemistry, United States
Leigh Martin
Affiliation:
[email protected], Washington State University, Department of Chemistry, United States
Get access

Abstract

Batch adsorption/dissolution experiments were conducted to examine the interactions between 233U(VI) and a synthetic aluminum oxyhydroxide (boehmite, γ-AlOOH) in 1.0M NaCl suspensions containing 1-hydroxyethane-1,1-diphosphonic acid (HEDPA). In the pH range 4 to 9, complexation of Al(III) by HEDPA significantly enhanced dissolution of boehmite. This phenomenon was especially pronounced in the neutral pH region where the solubility of aluminum, in the absence of complexants, is limited by the formation of sparsely soluble aluminum hydroxides. At high pH levels, dissolution of synthetic boehmite was inhibited by HEDPA, likely due to sorption of Al(III)/HEDPA complexes. Addition of HEDPA to equilibrated U(VI)-synthetic boehmite suspensions yielded an increase in the aqueous phase uranium concentration. The concentration of uranium continually increased over 59 days. Partitioning of uranium between the solid and aqueous phase was found to correlate well with HEDPA partitioning.

Keywords

actinideadsorptionwaste management
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 893: Symposium JJ – Actinides 2005 – Basic Science, Applications and Technology , 2005 , 0893-JJ07-02
Copyright
Copyright © Materials Research Society 2006

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Nash, K. L., Gelis, A. V., Jensen, M. P., Bond, A. H., Sullivan, J. C., Rao, L., Garnov, A., J. Nucl. Sci. Tech., Supplement 3, 512–515 (November 2002).Google Scholar
2. Reed, W., et al. , “Complexation of U(VI) with 1-hydroxy-1,1-ethanediphosphonic acid (HEDPA)” manuscript in preparation (2005).Google Scholar
3. APHA, Standard Methods for the Examination of Water and Wastewater, 17th ed. (America Public Health Association, Washington, DC, 1989) p. 4–166.Google Scholar
4. Lacour, S., Deluchat, V., Bollinger, J., Serpaud, B., Talanta, 46, 999–1009 (1998).Google Scholar
5. Gumienna-Kontecka, E., Silvagni, R., Lipinski, R., Lecouvey, M., Marincola, F. C., Crisoni, G., Nurchi, V. M., Leroux, Y., Koslowski, H., Inorg. Chim. Acta, 339, 111–118 (2002).Google Scholar
6. Powell, B. A., Rao, L., unpublished data.Google Scholar
7. Prikryl, J. D., Pabalan, R. T., Turner, D. R., Leslie, B. W., Radiochim. Acta. 66/67, 291–296 (1994).Google Scholar
8. Stumm, W., The Inner-sphere Surface Complex: A Key to Understanding Surface Reactivity, ed. Huang, C. P., O'Melia, C.R, and Morgan, J.J., (Advances in Chemistry Series 244, American Chemical Society, Washington, DC, 1995) pp. 1–32.Google Scholar
9. Nowack, D., Stone, A. T., Env. Sci. Tech. 33,3627–3633 (1999).Google Scholar
10. Guo, Z., Yu, X., Guo, F., Tao, Z., J. Colloid Inter. Sci. 288,14–20 (2005).Google Scholar