Table 2 Results of the initial dissolution rate measurements (r0) obtained by linear regression. Fraction of altered glass (FAG) and pH are given at the end of the test. Uncertainty on the pH is 0.1 unit. Congruency between Na and Si is calculated at the end of the test. n.d. not determined.
Glass | Test # | FAG | Congruency (Na/Si) | Final pH90 °C | Parameter considered for r0 calculation | r0 (g m−2 d−1) | Ln(r0) | y-intercept (g m−2) | R2 |
|---|---|---|---|---|---|---|---|---|---|
NBS12/28 | 1 | <0.01 | 1.1 ± 0.1 | 8.9 | Si | 192 ± 60 | 5.3 | 0.4 | 1.000 |
1 | Mass loss | 223 ± 45 | 5.4 | ||||||
2 | 0.26 | 9.0 | Si | 202 ± 60 | 5.3 | 0.6 | 0.995 | ||
NBS36/21 | 1 | 0.24 | 1.2 ± 0.1 | 9.5 | Si | 47,370 ± 14,360 | 10.8 | −31.2 | 0.986 |
Mass loss | 49,048 ± 9809 | 10.8 | |||||||
NBS31/15 | 1 | 0.02 | 1.1 ± 0.1 | 9.1 | Si | 2070 ± 620 | 7.6 | 3.8 | 0.999 |
Mass loss | 2756 ± 551 | 7.9 | |||||||
NBS14/18 | 1 | 0.06 | n.d. | 9.0 | Si | 12.0 ± 3.6 | 2.5 | 0.2 | 0.999 |
2 | 0.08 | 8.9 | Si | 17.7 ± 5.3 | 2.9 | 0.1 | 0.989 | ||
3 | 0.07 | 9.0 | Si | 12.2 ± 3.7 | 2.5 | 0.1 | 0.999 | ||
NBSA | 1 | 0.03 | 1.1 ± 0.1 | 8.9 | Si | 2.6 ± 0.8 | 0.9 | −0.02 | 0.997 |
NBSAC | 1 | 0.04 | 1.0 ± 0.1 | 8.9 | Si | 9.9 ± 3.0 | 2.3 | −0.08 | 0.986 |
NBSACZ | 1 | 0.09 | 1.1 ± 0.1 | 9.0 | Si | 8.2 ± 2.5 | 2.1 | 0.2 | 0.990 |
NBSAZ | 1 | 0.02 | 1.0 ± 0.1 | 8.9 | Si | 2.2 ± 0.6 | 0.8 | 0.04 | 0.997 |
NBSC | 1 | 0.24 | 1.0 ± 0.1 | 8.9 | Si | 52.2 ± 15.7 | 4.0 | 0.4 | 1.000 |
NBSCZ | 1 | 0.26 | 1.1 ± 0.1 | 8.9 | Si | 56.4 ± 17.0 | 4.0 | 0.8 | 0.999 |
NSAC19 | 1 | 0.08 | 8.8 | Si | 5.6 ± 1.7 | 1.7 | 0.05 | 0.998 | |
2 | 0.02 | 9.0 | Si | 7.2 ± 2.2 | 2.0 | −0.1 | 0.999 | ||
3 | 0.02 | 1.2 ± 0.1 | 9.1 | Si | 5.5 ± 1.7 | 1.7 | −0.12 | 0.984 | |
NSAC17 | 1 | 0.14 | 8.8 | Si | 9.8 ± 2.9 | 2.3 | 0.2 | 0.997 | |
3 | 0.02 | 1.0 ± 0.1 | 9.0 | Si | 5.0 ± 1.5 | 1.6 | −0.03 | 0.996 | |
NSAC21 | 1 | 0.16 | 8.8 | Si | 7.4 ± 2.2 | 2.0 | 0.1 | 0.998 | |
2 | 0.11 | 9.0 | Si | 6.1 ± 2.2 | 1.8 | −0.1 | 0.998 | ||
3 | 0.03 | 9.0 | Si | 4.5 ± 1.4 | 1.5 | 0.0 | 0.992 | ||
4 | 0.02 | 9.0 | Si | 7.2 ± 1.4 | 2.0 | −0.01 | 1.000 | ||
5 | 0.02 | 1.4 ± 0.1 | 9.1 | Si | 4.6 ± 1.4 | 1.5 | −0.03 | 0.974 | |
NSAC0 | 3 | 0.02 | 9.1 | Si | 3.8 ± 1.3 | 1.3 | −0.03 | 0.999 | |
NSAC35 | 1 | 0.01 | 145 ± 10 | 9.4 | Si | 1.2 ± 0.4 | 0.15 | 0.08 | 0.997 |
NSA | 1 | 0.03 | n.d. | 8.9 | Si | 0.26 ± 0.05 | −1.3 | 0.02 | 0.995 |
