Sorption behavior of γ-irradiated α-Al2O3 |
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Authors: | A S Rodriguez B E M Lopez |
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Institution: | (1) Chemistry Department, National Institute of Nuclear Research, P.O. Box 18-1027, Col. Escandon, Deleg. Miguel Hidalgo, 11801 Mexico, D. F., Mexico |
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Abstract: | Irradiation of α-Al2O3 (Corundum) was carried out in contact with acidic media and with different doses (100-to-2500 kGy) and dose-rates (0.9, 2.6
and 6.1 kGy·h−1) of γ-rays. Simultaneously parallel experiments were carried out using the same procedure, but preheated at 150°C for two
days and then irradiated without acidic media. The solid thus obtained was used to determine the effect of γ-irradiation on
the sorption capacities of microamounts of fission products from strongly alkaline aqueous solutions of uranium. The results
revealed that the effect of γ-irradiation of α-Al2O3 and the acidic media in which it is immersed, is associated with a stable matrix resistant to significant changes in the
composition of the surface layer; whilst it seems that the effect of γ-irradiation of preheated α-Al2O3, is connected with changes of surface-OH groups strongly affected by heat treatment and irradiation dose. |
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