Table 6

Solution analyses for strontium sorption to goethite in air, I = 0.1 M NaNO3 and T = 25°C.
Final pH
 Surface Area m2 L-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

Carroll et al. Geochemical Transactions 2008 9:2   doi:10.1186/1467-4866-9-2