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Dissolution Mechanism of Soda-Lime Silicate Glass and of PNL 76-68 in the Presence of Dissolved Mg

Published online by Cambridge University Press:  25 February 2011

Jing C. Sang ,
Yan Guo ,
Alisa Barkatt ,
M.A. Adel-Hadadi ,
Gwendolyn S. Marbury  and
Aaron Barkatt
Jing C. Sang
Affiliation:
Department of Chemistry, The Catholic University of America, Washington, DC 20064
Yan Guo
Affiliation:
Department of Chemistry, The Catholic University of America, Washington, DC 20064
Alisa Barkatt
Affiliation:
Department of Chemistry, The Catholic University of America, Washington, DC 20064
M.A. Adel-Hadadi
Affiliation:
Department of Chemistry, The Catholic University of America, Washington, DC 20064
Gwendolyn S. Marbury
Affiliation:
Department of Chemistry, The Catholic University of America, Washington, DC 20064
Aaron Barkatt
Affiliation:
Department of Chemistry, The Catholic University of America, Washington, DC 20064
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Abstract

Leaching studies were performed on powdered PNL 76-68 glass in de-ionized water in the presence of Mg solute. The results showed that the presence of Mg in the leachant greatly reduced the rate of glass dissolution. The equation Q=krα was used to express the experimental data. In the absence of Mg, α was about 1, i.e., the amount of glass dissolved was linear with time. In the presence of Mg, α was close to 0.5, i.e. the extracted amount was proportional to the square root of time. Therefore, the reduction of the dissolution rate of PNL 76-68 glass in the presence of Mg solute could be explained as a result of a change in the glass dissolution mechanism.

Comparative leaching studies on bulk soda-lime silicate glass in a sodium borate buffered system (pH 8.1) showed the same results. The presence of Mg in the leachant reduced the rate of glass dissolution. In the absence of Mg, α was about 1, while in the presence of Mg, α was 0.5. This change in α was not caused by changes in pH, and it represents a real change in the glass dissolution mechanism.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 333: Symposium V – Scientific Basis for Nuclear Waste Management XVII , 1993 , 519
Copyright
Copyright © Materials Research Society 1994

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References

REFERENCES

1 Barkatt, Aa., Saad, E. E., Adiga, R., Sousanpour, W., Barkatt, Al., Adel-Hadadi, M. A., O’Keefe, J. A. and Alterescu, S., Appl. Geochem. 6 (1989) 593.CrossRefGoogle Scholar
2 Lee, C. T. and Clark, D. E., Adv. in Ceram. 20 (1986) 541.Google Scholar
3 Dilmore, M. G., Clark, D. E. and Hench, L. L., Ceram. Bull 58 (1979) 1111.Google Scholar
4 Douglas, R. W. and El-Shamy, T. M. M., J. Am. Ceram. Soc. 50 (1967) 1.CrossRefGoogle Scholar
5 Lyle, A. K., J. Am. Ceram. Soc. 50 (1943) 201.Google Scholar
6 Hespe, E. D., At. Ener. Rev. 9 (1971) 195.Google Scholar
7 Mendel, J. E., Ross, W. A., Roberts, F. P., Katayama, Y. B., Westsik, J. H. Jr., Turcotte, P. P., Wald, J. W. and Bradley, D. J., BNWL-2252. Battelle Pacific Northwest Laboratories, Richland, WA, 1977.Google Scholar
8 El-Shamy, T. M. and Morsi, S. E. J. Non-Cryst. Solids 19 (1975) 241.Google Scholar
9 Sang, J. C. and Barkatt, A., submitted to Phys. Chem. Glasses.Google Scholar
10 Bunker, B. C., Arnold, G. W., Beauchamp, E. K. and Day, D. E. J. Non-Cryst. Solids 58 (1983) 295.Google Scholar
11 Bourcier, W. L., Mat. Res. Soc. Symp. Proc. 212 (1993) 3.CrossRefGoogle Scholar