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Rock alteration in alkaline cement waters over 15 years and its relevance to the geological disposal of nuclear waste

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Figure

Table 1
Fig. 1. Concentrations of (a) K, (b) Na, (c) Ca, (d) Si, (e) Sr, (f) SO4, (g) Mg and (h) CO3 in solution in the starting solution and after 4, 9, 15 months and 15 years of reaction inYNFP and ENFG (solid triangle and square markers respectively) and in corresponding ‘blank’ experiments (corresponding unfilled markers).
Table 2
Fig. 4. Surface phases from rock altered in YNFP for 15 years (a) Mg–silicate ‘sheet-like’ phase: TEM image and (b) corresponding EDX spectrum and SAED pattern; (c) Mg–Al–silicate elongate rods: TEM image with inset higher resolution of rod end, (d) corresponding EDX spectrum and SAED pattern; (e) Mg–Al–K–silicate short rods TEM image and(f) corresponding EDX spectrum; (g) group of radiating rods of Mg–A–K–silicate composition TEM image with inset showing the ‘sheet-like’ nature of the group of radiatingacicular needles and (h) corresponding EDX spectrum.
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