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 orbed | Γ Sr sorbed Mol m-2 |
---|---|---|---|---|---|
Total Sr = 10-3 M aged for 2 days |  | ± 5% |  | ||
3.14 | 10934 | 9.99 × 10-4 | 9.71 × 10-4 | 2.8 | 2.57 × 10-9 |
3.89 | 10983 | 1.00 × 10-3 | 9.90 × 10-4 | 1.3 | 1.17 × 10-9 |
3.89 | 10983 | 1.00 × 10-3 | 9.88 × 10-4 | 1.5 | 1.38 × 10-9 |
5.42 | 11037 | 1.01 × 10-3 | 9.86 × 10-4 | 2.0 | 1.86 × 10-9 |
6.02 | 11075 | 1.01 × 10-3 | 9.83 × 10-4 | 2.5 | 2.32 × 10-9 |
6.33 | 11115 | 1.01 × 10-3 | 9.78 × 10-4 | 3.4 | 3.06 × 10-9 |
6.55 | 11095 | 1.01 × 10-3 | 9.97 × 10-4 | 1.5 | 1.40 × 10-9 |
7.12 | 11101 | 1.01 × 10-3 | 9.80 × 10-4 | 3.2 | 2.92 × 10-9 |
7.04 | 11035 | 1.01 × 10-3 | 9.74 × 10-4 | 3.4 | 3.15 × 10-9 |
7.42 | 10855 | 9.95 × 10-4 | 9.33 × 10-4 | 6.3 | 5.74 × 10-9 |
7.95 | 10705 | 9.80 × 10-4 | 8.40 × 10-4 | 14.2 | 1.30 × 10-8 |
8.62 | 10415 | 9.54 × 10-4 | 6.23 × 10-4 | 34.7 | 3.18 × 10-8 |
9.12 | 10088 | 9.21 × 10-4 | 4.16 × 10-4 | 54.8 | 5.00 × 10-8 |
9.52 | 9720 | 8.88 × 10-4 | 2.64 × 10-4 | 70.3 | 6.43 × 10-8 |
Total Sr = 10-4 M aged for 2 days |  | ± 5% |  | ||
4.20 | 11019 | 1.00 × 10-4 | 9.85 × 10-5 | 2.0 | 1.80 × 10-10 |
4.89 | 11005 | 1.01 × 10-4 | 9.88 × 10-5 | 1.7 | 1.60 × 10-10 |
5.50 | 11034 | 1.01 × 10-4 | 9.92 × 10-5 | 1.6 | 1.42 × 10-10 |
6.22 | 11013 | 1.01 × 10-4 | 1.01 × 10-4 | 0.4 | 3.93 × 10-11 |
6.33 | 11057 | 1.01 × 10-4 | 1.01 × 10-4 | 0.5 | 4.92 × 10-11 |
6.71 | 11110 | 1.01 × 10-4 | 9.97 × 10-5 | 1.7 | 1.56 × 10-10 |
6.62 | 11087 | 1.01 × 10-4 | 1.01 × 10-4 | 0.7 | 6.64 × 10-11 |
7.01 | 11086 | 1.01 × 10-4 | 9.84 × 10-5 | 2.5 | 2.30 × 10-10 |
7.46 | 10912 | 9.96 × 10-5 | 9.38 × 10-5 | 5.8 | 5.31 × 10-10 |
7.82 | 10809 | 9.86 × 10-5 | 8.75 × 10-5 | 11.3 | 1.03 × 10-9 |
8.54 | 10475 | 9.56 × 10-5 | 6.42 × 10-5 | 32.8 | 2.99 × 10-9 |
8.95 | 10257 | 9.39 × 10-5 | 4.89 × 10-5 | 47.9 | 4.38 × 10-9 |
9.43 | 9888 | 9.05 × 10-5 | 2.84 × 10-5 | 68.7 | 6.29 × 10-9 |
Total Sr = 10-5 M aged for 2 days |  | ± 5% |  | ||
6.82 | 11081 | 1.06 × 10-5 | 1.06 × 10-5 | -0.5 | -4.60 × 10-12 |
6.57 | 11086 | 1.06 × 10-5 | 1.04 × 10-5 | 1.5 | 1.41 × 10-11 |
6.57 | 11044 | 1.06 × 10-5 | 9.30 × 10-6 | 12.1 | 1.15 × 10-10 |
6.84 | 10939 | 1.05 × 10-5 | 1.03 × 10-5 | 1.5 | 1.42 × 10-11 |
7.22 | 10842 | 1.04 × 10-5 | 9.47 × 10-6 | 8.6 | 8.19 × 10-11 |
7.88 | 10672 | 1.02 × 10-5 | 8.33 × 10-6 | 18.3 | 1.74 × 10-10 |
7.91 | 10481 | 1.00 × 10-5 | 7.53 × 10-6 | 24.7 | 2.35 × 10-10 |
9.16 | 9584 | 9.14 × 10-6 | 2.40 × 10-6 | 73.8 | 7.03 × 10-10 |
9.74 | 8484 | 8.13 × 10-6 | 8.33 × 10-7 | 89.8 | 8.60 × 10-10 |
Total Sr = 1.5 10-6 M aged for 2 days |  | ± 10% |  | ||
6.32 | 11056 | 1.51 × 10-6 | 1.60 × 10-6 | -5.5 | -7.55 × 10-12 |
6.53 | 11013 | 1.51 × 10-6 | 1.56 × 10-6 | -3.4 | -4.65 × 10-12 |
6.82 | 11000 | 1.51 × 10-6 | 1.59 × 10-6 | -5.0 | -6.85 × 10-12 |
6.83 | 11032 | 1.51 × 10-6 | 1.55 × 10-6 | -2.8 | -3.86 × 10-12 |
7.06 | 10988 | 1.50 × 10-6 | 1.39 × 10-6 | 7.3 | 9.99 × 10-12 |
7.29 | 10900 | 1.49 × 10-6 | 1.45 × 10-6 | 2.7 | 3.74 × 10-12 |
8.65 | 9964 | 1.37 × 10-6 | 6.96 × 10-7 | 49.1 | 6.74 × 10-11 |
9.10 | 9534 | 1.31 × 10-6 | 3.77 × 10-7 | 71.2 | 9.76 × 10-11 |
9.16 | 9562 | 1.31 × 10-6 | 3.65 × 10-7 | 72.1 | 9.87 × 10-11 |
6.62 | 11041 | 1.52 × 10-6 | 1.51 × 10-6 | 0.6 | 7.93 × 10-13 |
6.59 | 11092 | 1.52 × 10-6 | 1.51 × 10-6 | 0.6 | 7.89 × 10-13 |
6.52 | 11036 | 1.52 × 10-6 | 1.48 × 10-6 | 2.7 | 3.71 × 10-12 |
6.77 | 10957 | 1.51 × 10-6 | 1.59 × 10-6 | -5.6 | -7.65 × 10-12 |
7.30 | 10831 | 1.48 × 10-6 | 1.37 × 10-6 | 7.4 | 1.01 × 10-11 |
9.62 | 9014 | 1.24 × 10-6 | 1.26 × 10-7 | 89.8 | 1.23 × 10-10 |
Total Sr = 6 × 10 -7 M aged for 2 days |  | ± 20% |  | ||
6.34 | 11073 | 6.10 × 10-7 | 6.91 × 10-7 | -13.3 | -7.33 × 10-12 |
6.65 | 11058 | 6.09 × 10-7 | 6.70 × 10-7 | -10.0 | -5.53 × 10-12 |
6.78 | 11046 | 6.08 × 10-7 | 6.41 × 10-7 | -5.4 | -2.99 × 10-12 |
6.83 | 11028 | 6.07 × 10-7 | 6.20 × 10-7 | -2.1 | -1.13 × 10-12 |
7.29 | 10862 | 5.98 × 10-7 | 6.01 × 10-7 | -0.6 | -3.08 × 10-13 |
7.2 | 10841 | 5.97 × 10-7 | 6.20 × 10-7 | -3.8 | -2.07 × 10-12 |
8.66 | 9955 | 5.48 × 10-7 | 2.50 × 10-7 | 54.4 | 3.00 × 10-11 |
9.06 | 9417 | 5.19 × 10-7 | 1.21 × 10-7 | 76.7 | 4.22 × 10-11 |
9.62 | 8977 | 4.94 × 10-7 | 4.34 × 10-8 | 91.2 | 5.02 × 10-11 |