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Study of Ni(II) sorption on chlorite - a fracture filling mineral in granites

Published online by Cambridge University Press:  17 March 2011

Å. Gustafsson ,
M. Molera  and
I. Puigdomenech
Å. Gustafsson
Affiliation:
Royal Institute of Technology, Inorganic Chemistry, Stockholm, Sweden
M. Molera
Affiliation:
Royal Institute of Technology, Nuclear Chemistry, Stockholm, Sweden
I. Puigdomenech
Affiliation:
Swedish Nuclear & Fuel Management Co., Stockholm, Sweden
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Abstract

Chlorite is an Fe(II)-containing phyllosilicate which is often present as a fracture filling mineral in e.g. granitic rocks. It may therefore be significant in influencing redox conditions and sorption processes in granitic groundwaters. The sorption properties of chlorite may therefore be important when modelling the migration of radionuclides under reducing conditions around nuclear waste repositories or in sites contaminated by mining waste.

The sorption behaviour of Ni(II) onto a natural chlorite (Karlsborg, Sweden) was investigated using a batch technique. The effects of three different background electrolyte concentrations (0.01 M, 0.1 M and 0.5 M NaClO4), different pH values (ranging from 4 to 11) and different Ni(II) concentrations (10−6 and 10−8 M) were studied under anoxic conditions in a glove-box. Ni(II) solutions were spiked with 63Ni and β-Liquid scintillation counting (LSC) was used to determine the concentration of nickel in the bulk solution, allowing the calculation of solid-water distribution coefficients for the metal ion.

The results of the sorption experiments show strong pH dependence at pH > 5, but the sorption is independent of ionic strength. The maximum adsorption is found in the pH range between 7 and 11 with Kd values ≍103 cm3/g. A diffuse double layer model has been used to describe the experimental results.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 824: Symposium CC – Scientific Basis for Nuclear Waste Management XXVIII , 2004 , CC7.3
Copyright
Copyright © Materials Research Society 2004

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References

1. Stumm, W. and Morgan, J.J., Aquatic Chemistry, 3rd ed. (John Wiley & Sons, New York, 1996).Google Scholar
2. Sposito, G., The Surface Chemistry of Soils. (Oxford Univ. Press, New York, 1984).Google Scholar
3. Sposito, G., in Geochemical Processes at Mineral Surfaces, edited by Davies, J.A. and Hayes, K.F. (A.C.S. Symp. Ser., 323, American Chemical Society, Washington, USA, 1986), p. 683; G. Sposito, N.T. Skipper, R. Sutton, S.-H. Park, and A.K. Soper, Proc. Natl. Acad. Sci., USA 96, 3358 (1999).Google Scholar
4. Dzombak, D.A. and Morel, F.M.M., Surface Complexation Modeling. Hydrous Ferric Oxide. (John Wiley & Sons, Inc., USA, 1990).Google Scholar
5.SKB, KBS 3 - Final storage of spent nuclear fuel, 1983.Google Scholar
6. Cui, D. and Eriksen, T.E., Radiochim. Acta 88, 751 (2000).Google Scholar
7. Hedin, A., Nucl. Technol. 138, 179 (2002); SKB, Deep repository for long-lived low- and intermediate-level waste. Preliminary safety assessment, Report No. SKB-TR-99-28, 1999; SKB, Deep repository for spent nuclear fuel. SR 97 - Post-closure safety, Report No. SKB-TR-99-06, 1999.Google Scholar
8. Klein, C., The 22nd edition of the Manual of Mineral Science. (John Wiley & Sons, Inc., 2002).Google Scholar
9. Shahwan, T. and Erten, H.N., . Radioanal. Nucl. Chem. 241, 151 (1999).Google Scholar
10. Bond, K.A., Boult, K.A., Green, A., and Linklater, C.M., Sorption of uranium(VI), pluto- nium and thorium onto aluminium oxide, muscovite and chlorite: An experimental and modelling study, Report No. NSS/R372, 2001; S.-H. Li, C.-J. Li, T. Yu, and Z.-F. Chai, J. Nucl. & Radiochem. 24 (2), 70 (2002) (in Chinese).Google Scholar
11. Koppelman, M.H. and Dillard, J.G., Clays & Clay Minerals 25, 457 (1977).Google Scholar
12. Arnold, T., Zorn, T., Zänker, H., Bernhard, G., and Nitsche, H., J. Cont. Hydrol. 47, 219 (2001).Google Scholar
13. Gustafsson, Å. and Puigdomenech, I., in Scientific Basis for Nuclear Waste Management, XXVI, edited by Finch, R.J. and Bullen, D.B. (757, Material Research Society, Boston, MA, USA, 2002), p. 649.Google Scholar
14. Scott, W.W., Scott's Standard Methods of Chemical Analysis, Fifth ed. (D. van Nostrand Co. Inc., 1939).Google Scholar
15. Parkhurst, D.L. and Appelo, C.A.J., User's guide to PHREEQC (Version 2)- A computer program for speciation,batchreaction, one-dimensional transport and inverse geochemical calculations., Report No. Water-Resources Investigations Report 99-4259, 1999.Google Scholar
16. Krawczyk-Bärsch, E., Arnold, T., Reuther, H., Brandt, F., Bosbach, D., and Bernhard, G., Applied Geochem., (in print) (2004).Google Scholar
17. Shahwan, T. and Erten, H.N., J. Radioanal. Nucl. Chem. 253, 115 (2002).Google Scholar
18. Bradbury, M.H. and Baeyens, B., J. Contaminant Hydrol. 27, 223 (1997).Google Scholar
19. Scheidegger, A.M., Lamble, G.M., and Sparks, D.L., Environ. Sci. Technol. 30, 548 (1996); C. Henning, T. Reich, R. Dähn, and A.M. Scheidegger, Radiochim. Acta 90, 653 (2002); R. Dähn, A.M. Scheidegger, A. Manceau, M.L. Schlegel, B. Baeyens, M.H. Bradbury, and D. Chateignert, Geochim. Cosmochim. Acta 67, 1 (2003).Google Scholar
20. Davis, J.A. and Kent, D.B., in Mineral-Water Interface Geochemistry, edited by Ho-chella, M.F. Jr, and White, A.F. (Reviews in Mineralogy, 23, Mineral. Soc. Amer., Washing-ton, D.C., 1990), p. 177.Google Scholar
21. Du, Q., Sun, Z., Forsling, W., and Tang, H., J. Colloid Interface Sci. 187, 221 (1997).Google Scholar
22. Stumm, W., Chemistry of the Solid-Water Interface: Processes at the Mineral-Water and Particle-Water Interface in Natural Systems. (John Wiley & Sons, Inc., 1992).Google Scholar