Table 6 Solution analyses for strontium sorption to goethite in air, I = 0.1 M NaNO3 and T = 25°C.
From: Surface complexation model for strontium sorption to amorphous silica and goethite
Final pH | Surface Area m2L-1 | Initial [Sr] M | Final [Sr] M | %Sr sorbed | Γ Sr sorbed Mol m-2 | Total Dissolved Carbonate M |
|---|---|---|---|---|---|---|
Total Sr = 10-4M aged for 2 days |  | ± 5% |  |  | ||
3.98 | 266 | 9.61 × 10-5 | 9.44 × 10-5 | 1.8 | 6.60 × 10-9 | not measured |
4.89 | 271 | 9.79 × 10-5 | 9.79 × 10-5 | 0.1 | 2.00 × 10-10 | not measured |
6.11 | 269 | 9.74 × 10-5 | 9.59 × 10-5 | 1.5 | 5.33 × 10-9 | not measured |
7.13 | 265 | 9.58 × 10-5 | 1.01 × 10-4 | -5.1 | -1.86 × 10-8 | not measured |
7.95 | 264 | 9.55 × 10-5 | 9.11 × 10-5 | 4.6 | 1.67 × 10-8 | not measured |
8.85 | 263 | 9.50 × 10-5 | 7.97 × 10-5 | 16.1 | 5.82 × 10-8 | not measured |
9.91 | 261 | 9.44 × 10-5 | 4.61 × 10-5 | 51.2 | 1.85 × 10-7 | not measured |
Total Sr = 10-5 M aged for 2 days |  | ± 5% |  |  | ||
3.99 | 275 | 1.01 × 10-5 | 9.86 × 10-6 | 2.0 | 7.19 × 10-10 | not measured |
5.09 | 275 | 1.00 × 10-5 | 1.02 × 10-5 | -2.2 | -8.14 × 10-10 | not measured |
6.22 | 274 | 1.00 × 10-5 | 1.01 × 10-5 | -0.8 | -2.76 × 10-10 | not measured |
7.29 | 273 | 9.99 × 10-6 | 9.35 × 10-6 | 6.4 | 2.34 × 10-9 | not measured |
8.15 | 277 | 1.01 × 10-5 | 7.26 × 10-6 | 28.2 | 1.03 × 10-8 | not measured |
8.92 | 275 | 1.01 × 10-5 | 4.54 × 10-6 | 54.8 | 2.00 × 10-8 | not measured |
9.95 | 271 | 9.91 × 10-6 | 1.60 × 10-6 | 83.9 | 3.06 × 10-8 | not measured |
Total Sr = 1.1 × 10-6 M aged for 2 days |  | (± 7%) |  |  | ||
4.04 | 273 | 1.10 × 10-6 | 9.82 × 10-7 | 10.4 | 4.17 × 10-10 | not measured |
4.97 | 274 | 1.10 × 10-6 | 9.93 × 10-7 | 9.6 | 3.83 × 10-10 | not measured |
6.11 | 273 | 1.09 × 10-6 | 1.02 × 10-6 | 7.1 | 2.84 × 10-10 | not measured |
7.22 | 275 | 1.10 × 10-6 | 1.04 × 10-6 | 5.6 | 2.25 × 10-10 | not measured |
7.95 | 271 | 1.09 × 10-6 | 9.59 × 10-7 | 11.8 | 4.73 × 10-10 | not measured |
8.95 | 273 | 1.09 × 10-6 | 5.14 × 10-7 | 53.0 | 2.13 × 10-9 | not measured |
9.94 | 270 | 1.08 × 10-6 | 1.14 × 10-7 | 89.5 | 3.59 × 10-9 | not measured |