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On the Structural Stability of Montmorillonite Submitted to Heavy γ-Irradiation

Published online by Cambridge University Press:  01 January 2024

Alicia Negron ,
Sergio Ramos ,
Alexander L. Blumenfeld ,
Graciela Pacheco  and
Jose J. Fripiat
Alicia Negron
Affiliation:
Instituto de Ciencias Nucleares, UNAM, A.P.70-543 C.U., México, 04510 D.F., Mexico
Sergio Ramos
Affiliation:
Instituto de Ciencias Nucleares, UNAM, A.P.70-543 C.U., México, 04510 D.F., Mexico
Alexander L. Blumenfeld
Affiliation:
Department of Chemistry and Laboratory for Surface Studies, University of Wisconsin-Milwaukee, P.O. Box 413, Milwaukee, Wisconsin, USA
Graciela Pacheco
Affiliation:
Department of Chemistry and Laboratory for Surface Studies, University of Wisconsin-Milwaukee, P.O. Box 413, Milwaukee, Wisconsin, USA
Jose J. Fripiat*
Affiliation:
Department of Chemistry and Laboratory for Surface Studies, University of Wisconsin-Milwaukee, P.O. Box 413, Milwaukee, Wisconsin, USA
*
*E-mail address of corresponding author: fripiat@aleph.cinstrum.unam.mx
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Abstract

The effect of heavy doses (up to 200 Mrad) of γ-radiation on the short-range structural organization in montmorillonite was studied using infrared (IR) spectroscopy and solid-state high-resolution 27Al and 29Si nuclear magnetic resonance (NMR). No change attributable to irradiation was observed. A small variation in the water content was noted but it is not systematic. The results show that the montmorillonite structure can accumulate high doses of radiation without damage and therefore this clay is a suitable material for use in the safe disposal of radioactive waste.

Keywords

γ-radiationSmectite
Type
Research Article
Information
Clays and Clay Minerals , Volume 50 , Issue 1 , February 2002 , pp. 35 - 37
Copyright
Copyright © 2002, The Clay Minerals Society

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