Table 3 Solution analyses for strontium sorption to amorphous silica in air, I = 0.005 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 = 10-4 M aged for 2 days |  | ± 5% |  |  | ||
6.85 | 10857 | 1.14 × 10-4 | 5.28 × 10-5 | 53.9 | 5.62 × 10-9 | 3.84 × 10-5 |
6.88 | 10983 | 1.16 × 10-4 | 5.04 × 10-5 | 56.7 | 5.94 × 10-9 | 3.93 × 10-5 |
7.16 | 10815 | 1.12 × 10-4 | 1.57 × 10-5 | 86.4 | 8.87 × 10-9 | 5.47 × 10-5 |
7.33 | 9931 | 1.05 × 10-4 | 2.87 × 10-5 | 72.9 | 7.64 × 10-9 | 5.80 × 10-5 |
7.74 | 9472 | 9.72 × 10-5 | 1.94 × 10-5 | 80.4 | 8.21 × 10-9 | 6.23 × 10-5 |
7.86 | 8468 | 8.92 × 10-5 | 1.81 × 10-5 | 80.0 | 8.39 × 10-9 | 2.45 × 10-4 |
7.97 | 8962 | 8.89 × 10-5 | 1.35 × 10-5 | 85.3 | 8.41 × 10-9 | 2.60 × 10-4 |
8.21 | 8502 | 8.41 × 10-5 | 7.74 × 10-6 | 91.3 | 8.98 × 10-9 | 2.21 × 10-4 |
8.36 | 8501 | 7.97 × 10-5 | 5.24 × 10-6 | 94.0 | 8.77 × 10-9 | 2.25 × 10-4 |
8.48 | 8504 | 7.40 × 10-5 | 3.34 × 10-6 | 96.1 | 8.31 × 10-9 | 2.32 × 10-4 |
8.64 | 8458 | 7.07 × 10-5 | 2.54 × 10-6 | 97.0 | 8.05 × 10-9 | 1.54 × 10-4 |
8.70 | 8529 | 6.91 × 10-5 | 2.04 × 10-6 | 97.7 | 7.87 × 10-9 | 1.35 × 10-4 |
8.76 | 8484 | 6.65 × 10-5 | 1.67 × 10-6 | 98.1 | 7.65 × 10-9 | 1.44 × 10-4 |
6.20 | 8830 | 9.69 × 10-5 | 8.19 × 10-5 | 15.6 | 1.70 × 10-9 | 7.51 × 10-6 |
6.59 | 9879 | 1.03 × 10-4 | 7.35 × 10-5 | 29.0 | 3.02 × 10-9 | 2.24 × 10-5 |
7.00 | 10715 | 1.14 × 10-4 | 5.89 × 10-5 | 48.8 | 5.18 × 10-9 | 3.36 × 10-5 |
7.34 | 11091 | 1.06 × 10-4 | 4.12 × 10-5 | 61.5 | 5.85 × 10-9 | 5.96 × 10-5 |
7.56 | 10071 | 9.88 × 10-5 | 2.94 × 10-5 | 70.7 | 6.89 × 10-9 | 6.61 × 10-5 |
7.50 | 10733 | 1.02 × 10-4 | 3.59 × 10-5 | 65.3 | 6.20 × 10-9 | 1.39 × 10-4 |
7.90 | 9476 | 8.96 × 10-5 | 1.78 × 10-5 | 80.6 | 7.58 × 10-9 | 1.93 × 10-4 |
8.13 | 9062 | 8.45 × 10-5 | 1.15 × 10-5 | 86.9 | 8.06 × 10-9 | 1.94 × 10-4 |
8.24 | 8935 | 8.04 × 10-5 | 1.19 × 10-5 | 85.7 | 7.66 × 10-9 | 2.09 × 10-4 |
8.44 | 8563 | 7.28 × 10-5 | 4.32 × 10-6 | 94.7 | 8.00 × 10-9 | 2.70 × 10-4 |
8.67 | 8495 | 6.37 × 10-5 | 2.85 × 10-6 | 96.2 | 7.17 × 10-9 | 2.36 × 10-4 |
8.89 | 8491 | 5.66 × 10-5 | 1.32 × 10-6 | 98.5 | 6.51 × 10-9 | 2.34 × 10-4 |
8.98 | 8696 | 5.34 × 10-5 | 1.12 × 10-6 | 98.8 | 6.02 × 10-9 | 2.06 × 10-4 |