Table 3 SEM/EDX results: elemental composition at selected positions after 3, 7 and 12 months (wt%).
From: Glass/steel/clay interactions in a simulated radioactive waste geological disposal system
GFeC-3 M | GFeC-7 M | GFeC-12 M | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Element | Glass (spec1,3,5) | Fe (spec4) | Clay (spec2) | Glass (spec2,3) | Fe (spec1) | Fe edge (spec7,9) | Fe edge* (spec8) | Clay (spec4) | Glass (spec2,3, 4,5) | Fe (spec1,8) | Clay + Fe (spec6) | Fe edge (spec7) |
O | 44.0 ± 0.8 | 50.2 | 40.8 ± 4.0 | 0.4 | 3.5 ± 3.2 | 29.1 | 44.7 | 44.9 ± 2.0 | 1.0 ± 1.0 | 48.0 | 10.8 | |
Na | 4.4 ± 0.5 | 5.7 | 4.9 ± 0.3 | 2.2 | 4.3 ± 1.1 | 2.6 | 0.8 | |||||
Mg | 0.4 | 2.0 | 0.2 ± 0.1 | 2.4 | 1.0 | |||||||
Al | 0.4 ± 0.4 | 11.7 | 0.1 ± 0.1 | 0.4 ± 0.4 | 3.7 | 9.2 | 0.9 ± 0.2 | 7.9 | 3.3 | |||
Si | 27.1 ± 2.2 | 28.5 | 27.3 ± 6.0 | 0.1 | 0.5 ± 0.5 | 8.3 | 27.9 | 27.0 ± 0.8 | 21.5 | 6.5 | ||
K | 0.3 ± 0.3 | 2.5 | 2.5 ± 2.5 | 0.7 | 4.2 | 0.4 ± 0.1 | 2.2 | 1.2 | ||||
Ca | 0.9 | 0.4 ± 0.2 | 0.7 | 1.3 | ||||||||
Fe | 0.7 ± 0.7 | 100.0 | 99.4 | 95.7 ± 4.0 | 57.3 | 6.6 | 0.6 ± 0.1 | 99.5 ± 0.7 | 14.2 | 75.1 | ||
Zr | 8.3 ± 0.8 | 8.3 ± 1.5 | 9.0 ± 0.8 | |||||||||
Ba | 15.8 ± 0.5 | 16.2 ± 5.9 | 13.1 ± 0.5 | 0.6 | ||||||||
