Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-02T19:21:46.013Z Has data issue: false hasContentIssue false
  • English
  • Français

Adsorption Behavior of I– Ions on Minerals for Geologic Disposal of 129I Wastes

Published online by Cambridge University Press:  15 February 2011

M. Sazarashi ,
Y. Ikeda ,
R. Seki ,
H. Yoshikawa  and
Y. Takashima
M. Sazarashi
Affiliation:
Institute of Research and Innovation, 1201, Takada, Kashiwa-shi, Chiba 277
Y. Ikeda
Affiliation:
Institute of Research and Innovation, 1201, Takada, Kashiwa-shi, Chiba 277
R. Seki
Affiliation:
Department of Chemistry, University of Tsukuba, 1–1–1, Tennodai, Ibaraki 305
H. Yoshikawa
Affiliation:
Tokai Works, Power Reactor and Nuclear Fuel Development Corporation, 4–33, Muramatsu, Tokai-mura, Naka-gun, Ibaraki 319–11, Japan.
Y. Takashima
Affiliation:
Institute of Research and Innovation, 1201, Takada, Kashiwa-shi, Chiba 277
Get access

Abstract

The I– adsorption on a modified mineral, which is prepared by impregnating Ag(l) nitrate complex with thiourea(tu) into montmorillonites, have been studied by batch method. The modified mineral was found to adsorb I– ions selectively even under the coexistence of Cl– ions. The distribution ratio(Kd) is 5000 ml/g under the conditions of initial [I–] = 1.0 × 10−5 M(M = mol/dm3), pH = 6.4, and solution/modified mineral = 100 ml/g. It was found that the [Ag(tu)]I precipitates are formed by mixing Nal solution with Ag(l)-tu complex solution, while any precipitates are not formed in addition of NaCl solution, and that anion exchange property of the modified mineral is low. Furthermore, it was confirmed that the [Ag(tu)]I complexes are present in the modified minerals after adsorbing I– ions. From these results, the I– selective adsorptivity of the modified mineral was considered to be due to the formation of [Ag(tu)]I precipitates within the interlayer region of montmorillonite.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 353: Symposium – Scientific Basis for Nuclear Waste Management XVIII , 1994 , 1037
Copyright
Copyright © Materials Research Society 1995

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. White, I.F. and Smith, G.M., NRPB-M81(1983).Google Scholar
2. Allard, B., Torstenfelt, T.B., Anderson, K., and Ryberg, J., Mat. Res. Soc. Symp. Proc., 2, 673(1981).Google Scholar
3. Atkins, M., and Glasser, F.P., Mat. Res. Soc. Symp. Proc., 176, 15(1990).Google Scholar
4. Haq, Z., Environ. Sci. Technol., 14, 1106(1980).Google Scholar
5. Taylor, P., AECL-10163 (1990).Google Scholar
6. Clark, C.J. and McBride, M.B., Clays Clay Miner., 32, 291(1984).Google Scholar
7. Sazarashi, M., Ikeda, Y., Seki, R., and Yoshikawa, H., J. Nucl. Sci. Technol., 31, 620(1994).Google Scholar
8. Ikeda, Y., Sazarashi, M., Tuji, M., Seki, R., and Yoshikawa, H., J. Radiochim. Acta, in press.Google Scholar
9. Pleyseir, J. and Cremers, A., J. Chem. Soc. Faraday Trans., 1, 71, 256(1975).Google Scholar
10. Yamaguchi, A., Penland, R.B., Mizushima, S., Lane, T.J., Curran, C., and Quagliano, J.V., J. Am. Chem. Soc., 80, 527(1958).Google Scholar
11. Schindler, P. W. and Stumm, W., Aquatic Surface Chemistry, (John Wiley & Sons, New York, 1987), p. 87.Google Scholar