Table 8 EXAFS fit results for strontium sorbed to amorphous silica and goethite (R, N, σ2 and ΔE0 adjusted in fits).
From: Surface complexation model for strontium sorption to amorphous silica and goethite
Electrolyte | pH | T(K) | Sr-Za | R(Å) | N | σ2(Å2) | ΔE0(eV) |
|---|---|---|---|---|---|---|---|
Amorphous Silica, Srtotal = 10-3 M | |||||||
0.1 M Na Cl | 8.1 | 20 | Sr-O | 2.60 | 10.0 | 0.0081 | -4.9 |
0.1 M Na Cl | 8.9 | 20 | Sr-O | 2.60 | 10.1 | 0.0087 | -5.4 |
0.1 M Na Cl | 9.4 | 25 | Sr-O | 2.60 | 10.6 | 0.0094 | -6.1 |
0.1 M Na Cl | 9.7 | 16 | Sr-O | 2.60 | 10.3 | 0.0086 | -5.9 |
Goethitec, Srtotal = 10-3 M | |||||||
0.1 M Na Cl | 8.5 | 20 | Sr-O | 2.63 | 10.1 | 0.0084 | -6.6 |
| Â | Â | Â | Sr-C | 3.05 | 3.8 | 0.0018 | Â |
| Â | Â | Â | Sr-Sr | 4.14 | 3.4 | 0.0021 | Â |
| Â | Â | Â | Sr-Sr | 4.28 | 1.4 | 0.0005 | Â |
| Â | Â | Â | Sr-Sr | 4.90 | 3.3 | 0.0031 | Â |
0.1 M Na Cl | 8.7 | RT | Sr-O | 2.58 | 8.3 | 0.0126 | -5.6 |
0.1 M Na Cl | 9.3 | 15 | Sr-O | 2.61 | 9.8 | 0.0081 | -5.0 |
0.1 M NaNO3 | 9.9 | 12 | Sr-O | 2.60 | 9.1 | 0.0077 | -6.9 |