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γ-Zirconium Phosphate as a Cs-Waste form for Partitioned Wastes

Published online by Cambridge University Press:  21 February 2011

Sridhar Komarneni  and
Rustum Roy
Sridhar Komarneni
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802, USA
Rustum Roy
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802, USA
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Abstract

γ-zirconium phosphate (γ-ZrP), γ-Zr(HPO4)2 2H2O is an extremely selective cesium ion sieve for nuclear waste solutions. Because of its layer structure, the adsorbed Cs can be directly fixed in γ-ZrP by collapsing the layers upon heat treatment. Fixation of 96 and 98% of the adsorbed Cs was achieved by simple heat treatment at 350°C and 600°C respectively. Thus, heat treatment of this γ-ZrP leads to a good radiophase with good leach resistance. Cs sorbed γ-ZrP can also be converted to CsZr2(PO4)3 [;sodium zirconium phosphate (NZP) radiophase] by sintering with ammonium monobasic phosphate and zirconyl nitrate at about 850°C. Thus, γ-ZrP serves as a precursor to CsZr2(PO4)3 radiophase which has comparable leach resistance to other phases under consideration for radio-Cs immobilization.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 15: Symposium D – Scientific Basis for Nuclear Waste Management VI , 1982 , 77
Copyright
Copyright © Materials Research Society 1983

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References

REFERENCES

1. Mercer, B.W. and Ames, L.L. in: Natural Zeolites, Occurrence, Properties, Use, Sand, L.B., Mumpton, F.A., eds. (Pergamon Press, Oxford and New York, 1978) pp. 451–462.Google Scholar
2. Nelson, J.L. and Mercer, B.W., U.S. Atomic Energy Comm. Doc. No. HW-76449.Google Scholar
3. Strachan, D.M. and Schulz, W.W., Ceram. Bull. 58, 865 (1979).Google Scholar
4. Gallagher, S.A., McCarthy, G.J. and Smith, D.K.,Mat. Res. Bull. 12, 1183 (1977).CrossRefGoogle Scholar
5. Adl, T. and Vance, E.R., J. Mat. Sci. 17, 849 (1982).CrossRefGoogle Scholar
6. Roy, R., Vance, E.R. and Alamo, J., Mat. Res. Bull. 17, 585 (1982).CrossRefGoogle Scholar
7. Johnstone, J.K. and Kenna, B.T., J. Amer. Ceram. Soc. 56, 342 (1977).Google Scholar
8. Komarneni, S. and Roy, R., Nature 299, 707 (1982).CrossRefGoogle Scholar
9. Komarneni, S. and Roy, D.M., J. Inorg. Nucl. Chem. 40, 893 (1978).CrossRefGoogle Scholar
10. Yamanaka, S., Inorg. Chem. 15, 2811 (1976).CrossRefGoogle Scholar
11. Clearfield, A. and Kalnins, J.M., J. Inorg. Nucl. Chem. 40, 1933 (1978).CrossRefGoogle Scholar
12. Clearfield, A., Jirustithipong, P., Cotman, R.N. and Pack, S.R., Mat. Res. Bull. 15, 1603 (1980).CrossRefGoogle Scholar