Table 2 Solution analyses for strontium sorption to amorphous silica in air, I = 0.1 M NaCl 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 = 10-3 M aged for 2 days |  | ± 5% |  |  | ||
6.67 | 11073 | 9.98 × 10-4 | 1.01 × 10-3 | -1.5 | -1.31 × 10-9 | not measured |
6.72 | 11098 | 1.00 × 10-3 | 1.02 × 10-3 | -1.6 | -1.43 × 10-9 | not measured |
6.80 | 11086 | 9.98 × 10-4 | 1.03 × 10-3 | -3.6 | -3.27 × 10-9 | not measured |
6.90 | 11060 | 9.94 × 10-4 | 1.02 × 10-3 | -2.5 | -2.21 × 10-9 | not measured |
7.19 | 11012 | 9.91 × 10-4 | 1.05 × 10-3 | -6.1 | -5.46 × 10-9 | not measured |
7.89 | 10724 | 9.66 × 10-4 | 9.35 × 10-4 | 3.2 | 2.89 × 10-9 | not measured |
8.32 | 10522 | 9.45 × 10-4 | 8.00 × 10-4 | 15.4 | 1.38 × 10-8 | not measured |
8.65 | 10237 | 9.23 × 10-4 | 5.28 × 10-4 | 42.7 | 3.85 × 10-8 | not measured |
9.58 | 9224 | 8.33 × 10-4 | 3.22 × 10-5 | 96.1 | 8.68 × 10-8 | not measured |
6.54 | 11016 | 1.00 × 10-3 | 1.02 × 10-3 | -1.5 | -1.36 × 10-9 | 1.72 × 10-5 |
6.61 | 11026 | 1.00 × 10-3 | 1.01 × 10-3 | -0.4 | -3.41 × 10-10 | 3.61 × 10-5 |
6.70 | 11004 | 9.97 × 10-4 | 1.01 × 10-3 | -0.9 | -8.38 × 10-10 | 3.34 × 10-5 |
6.73 | 11003 | 9.99 × 10-4 | 9.99 × 10-4 | 0.0 | 1.79 × 10-12 | 3.69 × 10-6 |
7.14 | 10961 | 9.93 × 10-4 | 9.69 × 10-4 | 2.4 | 2.19 × 10-9 | 2.67 × 10-5 |
7.72 | 10758 | 9.77 × 10-4 | 8.82 × 10-4 | 9.7 | 8.76 × 10-9 | 1.72 × 10-4 |
8.65 | 10327 | 9.36 × 10-4 | 5.85 × 10-4 | 37.5 | 3.40 × 10-8 | 3.52 × 10-4 |
8.98 | 10019 | 9.04 × 10-4 | 4.33 × 10-4 | 52.1 | 4.70 × 10-8 | 4.44 × 10-4 |
9.57 | 9565 | 8.65 × 10-4 | 2.20 × 10-4 | 74.6 | 6.75 × 10-8 | 5.64 × 10-4 |
7.98 | 10670 | 9.68 × 10-4 | 8.49 × 10-4 | 12.2 | 1.11 × 10-8 | 1.04 × 10-4 |
8.06 | 10590 | 9.68 × 10-4 | 8.60 × 10-4 | 11.1 | 1.01 × 10-8 | 8.95 × 10-5 |
8.82 | 10187 | 9.27 × 10-4 | 5.25 × 10-4 | 43.3 | 3.95 × 10-8 | 1.05 × 10-4 |
8.84 | 10272 | 9.27 × 10-4 | 5.05 × 10-4 | 45.5 | 4.11 × 10-8 | 1.54 × 10-4 |
8.85 | 10228 | 9.28 × 10-4 | 5.30 × 10-4 | 42.8 | 3.89 × 10-8 | 1.46 × 10-4 |
8.91 | 10160 | 9.27 × 10-4 | 5.14 × 10-4 | 44.6 | 4.07 × 10-8 | 2.13 × 10-4 |
9.16 | 9992 | 9.05 × 10-4 | 3.86 × 10-4 | 57.3 | 5.20 × 10-8 | 1.53 × 10-4 |
9.19 | 9967 | 9.06 × 10-4 | 3.91 × 10-4 | 56.8 | 5.17 × 10-8 | 1.52 × 10-4 |
9.26 | 9767 | 8.88 × 10-4 | 3.77 × 10-4 | 57.5 | 5.23 × 10-8 | 3.47 × 10-5 |
9.38 | 9961 | 9.00 × 10-4 | 3.40 × 10-4 | 62.2 | 5.62 × 10-8 | 2.40 × 10-5 |
9.44 | 9849 | 8.96 × 10-4 | 3.24 × 10-4 | 63.8 | 5.81 × 10-8 | 9.92 × 10-5 |
9.53 | 9822 | 8.88 × 10-4 | 2.83 × 10-4 | 68.2 | 6.16 × 10-8 | 7.95 × 10-5 |
9.54 | 9787 | 8.88 × 10-4 | 2.72 × 10-4 | 69.4 | 6.30 × 10-8 | 1.85 × 10-4 |
9.72 | 9461 | 8.58 × 10-4 | 2.29 × 10-4 | 73.3 | 6.65 × 10-8 | 1.82 × 10-4 |
Total Sr = 10-4 M aged for 2 days |  | ± 5% |  |  | ||
7.08 | 11079 | 1.00 × 10-4 | 1.04 × 10-4 | -3.5 | -3.15 × 10-10 | not measured |
6.41 | 11063 | 1.01 × 10-4 | 1.06 × 10-4 | -5.1 | -4.57 × 10-10 | not measured |
6.92 | 11002 | 1.00 × 10-4 | 1.09 × 10-4 | -8.9 | -8.11 × 10-10 | not measured |
7.02 | 10966 | 9.99 × 10-5 | 1.05 × 10-4 | -5.3 | -4.79 × 10-10 | not measured |
7.26 | 10922 | 9.88 × 10-5 | 9.88 × 10-5 | 0.0 | 4.05 × 10-13 | not measured |
7.50 | 10712 | 9.70 × 10-5 | 9.10 × 10-5 | 6.2 | 5.61 × 10-10 | not measured |
8.57 | 10078 | 9.14 × 10-5 | 5.30 × 10-5 | 42.2 | 3.81 × 10-9 | not measured |
9.33 | 9404 | 8.51 × 10-5 | 2.15 × 10-5 | 75.2 | 6.77 × 10-9 | not measured |
9.86 | 8585 | 7.81 × 10-5 | 9.13 × 10-6 | 88.7 | 8.03 × 10-9 | not measured |
Total Sr = 10-5 M aged for 2 days |  | ± 5% |  |  | ||
6.21 | 10913 | 1.05 × 10-5 | 1.07 × 10-5 | -1.4 | -1.39 × 10-11 | not measured |
6.40 | 11302 | 1.06 × 10-5 | 1.04 × 10-5 | 1.2 | 1.13 × 10-11 | not measured |
6.70 | 11458 | 1.06 × 10-5 | 1.03 × 10-5 | 2.0 | 1.88 × 10-11 | not measured |
7.15 | 11367 | 1.05 × 10-5 | 1.01 × 10-5 | 3.8 | 3.54 × 10-11 | not measured |
6.95 | 10918 | 1.05 × 10-5 | 1.04 × 10-5 | 1.0 | 9.75 × 10-12 | not measured |
7.60 | 10844 | 1.03 × 10-5 | 9.45 × 10-6 | 8.5 | 8.10 × 10-11 | not measured |
7.91 | 10811 | 1.03 × 10-5 | 8.71 × 10-6 | 15.1 | 1.43 × 10-10 | not measured |
8.92 | 10175 | 9.72 × 10-6 | 4.36 × 10-6 | 55.2 | 5.27 × 10-10 | not measured |
9.58 | 9544 | 9.12 × 10-6 | 1.85 × 10-6 | 79.7 | 7.62 × 10-10 | not measured |
Total Sr = 10-6 M aged for 2 days |  | ± 10% |  |  | ||
6.52 | 11049 | 1.59 × 10-6 | 1.65 × 10-6 | -3.9 | -5.60 × 10-12 | not measured |
6.64 | 11038 | 1.59 × 10-6 | 1.53 × 10-6 | 3.4 | 4.84 × 10-12 | not measured |
6.71 | 11025 | 1.58 × 10-6 | 1.50 × 10-6 | 5.4 | 7.78 × 10-12 | not measured |
6.81 | 11019 | 1.58 × 10-6 | 1.48 × 10-6 | 6.7 | 9.56 × 10-12 | not measured |
6.88 | 11030 | 1.58 × 10-6 | 1.51 × 10-6 | 4.5 | 6.42 × 10-12 | not measured |
7.62 | 10867 | 1.56 × 10-6 | 1.42 × 10-6 | 8.8 | 1.26 × 10-11 | not measured |
8.39 | 10590 | 1.52 × 10-6 | 1.13 × 10-6 | 25.3 | 3.64 × 10-11 | not measured |
9.06 | 10235 | 1.47 × 10-6 | 7.21 × 10-7 | 50.9 | 7.32 × 10-11 | not measured |
9.59 | 9873 | 1.42 × 10-6 | 3.89 × 10-7 | 72.5 | 1.04 × 10-10 | not measured |
Total Sr = 7 × 10-7 M aged for 2 days |  | ± 20% |  |  | ||
6.89 | 11022 | 6.81 × 10-7 | 6.46 × 10-7 | 5.1 | 3.14 × 10-12 | not measured |
6.50 | 11070 | 6.83 × 10-7 | 6.57 × 10-7 | 3.8 | 2.31 × 10-12 | not measured |
6.70 | 11016 | 6.80 × 10-7 | 6.82 × 10-7 | -0.3 | -2.12 × 10-13 | not measured |
6.43 | 11013 | 6.80 × 10-7 | 7.18 × 10-7 | -5.6 | -3.44 × 10-12 | not measured |
7.56 | 10685 | 6.59 × 10-7 | 5.63 × 10-7 | 14.7 | 9.05 × 10-12 | not measured |
7.73 | 10508 | 6.49 × 10-7 | 5.15 × 10-7 | 20.6 | 1.27 × 10-11 | not measured |
8.52 | 9978 | 6.16 × 10-7 | 3.34 × 10-7 | 45.7 | 2.82 × 10-11 | not measured |
9.05 | 9538 | 5.89 × 10-7 | 1.71 × 10-7 | 70.9 | 4.38 × 10-11 | not measured |
9.53 | 8920 | 5.50 × 10-7 | 8.10 × 10-8 | 85.3 | 5.26 × 10-11 | not measured |