Table 4

Solution analyses for strontium sorption to goethite in nitrogen atmosphere, I = 0.1 M NaCl 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 Sr = 10-3 M, aged for 2 days
± 5%
6.53
 1412
 9.20 × 10-4
 9.44 × 10-4
 -2.5
 -1.65 × 10-8
6.79
 1435
 9.25 × 10-4
 9.26 × 10-4
 -0.2
 -1.01 × 10-9
6.96
 1457
 9.26 × 10-4
 9.06 × 10-4
 2.2
 1.37 × 10-8
7.26
 1565
 9.30 × 10-4
 8.47 × 10-4
 8.9
 5.30 × 10-8
7.40
 1449
 9.27 × 10-4
 8.07 × 10-4
 12.9
 8.28 × 10-8
7.82
 1433
 9.23 × 10-4
 6.85 × 10-4
 25.8
 1.66 × 10-7
8.30
 1478
 9.20 × 10-4
 6.23 × 10-4
 32.3
 2.01 × 10-7
8.91
 1479
 9.16 × 10-4
 5.27 × 10-4
 42.5
 2.63 × 10-7
9.49
 1445
 9.12 × 10-4
 3.28 × 10-4
 64.0
 4.04 × 10-7
6.23
 1431
 9.61 × 10-4
 9.45 × 10-4
 1.6
 1.08 × 10-8
6.74
 1494
 9.66 × 10-4
 8.98 × 10-4
 7.0
 4.56 × 10-8
7.16
 1472
 9.68 × 10-4
 9.30 × 10-4
 3.9
 2.58 × 10-8
7.47
 1472
 9.71 × 10-4
 7.87 × 10-4
 19.0
 1.25 × 10-7
8.19
 1491
 9.76 × 10-4
 7.67 × 10-4
 21.5
 1.40 × 10-7
8.51
 1482
 9.73 × 10-4
 7.71 × 10-4
 20.8
 1.37 × 10-7
8.88
 1481
 9.69 × 10-4
 5.56 × 10-4
 42.6
 2.79 × 10-7
9.25
 1462
 9.63 × 10-4
 3.29 × 10-4
 65.8
 4.34 × 10-7
10.02
 1452
 9.55 × 10-4
 9.74 × 10-5
 89.8
 5.91 × 10-7
Total Sr = 10-4 M, aged for 2 days
± 5%
6.43
 1570
 1.09 × 10-4
 1.16 × 10-4
 -5.5
 -3.85 × 10-9
6.78
 1433
 1.10 × 10-4
 1.10 × 10-4
 -0.6
 -4.52 × 10-10
7.23
 1431
 1.10 × 10-4
 1.13 × 10-4
 -2.7
 -2.09 × 10-9
7.49
 1442
 1.11 × 10-4
 1.10 × 10-4
 1.0
 7.44 × 10-10
7.78
 1602
 1.11 × 10-4
 1.00 × 10-4
 9.6
 6.63 × 10-9
8.19
 1555
 1.11 × 10-4
 8.76 × 10-5
 20.8
 1.48 × 10-8
8.89
 1511
 1.10 × 10-4
 4.53 × 10-5
 58.7
 4.26 × 10-8
9.38
 1532
 1.10 × 10-4
 3.44 × 10-5
 68.6
 4.90 × 10-8
9.9
 1540
 1.09 × 10-4
 1.88 × 10-5
 82.7
 5.85 × 10-8
Total Sr = 10-5 M, aged for 2 days
± 5%
6.43
 1540
 1.08 × 10-5
 1.06 × 10-5
 1.4
 9.51 × 10-11
6.74
 1534
 1.08 × 10-5
 1.05 × 10-5
 3.1
 2.19 × 10-10
7.30
 1501
 1.09 × 10-5
 1.07 × 10-5
 1.8
 1.29 × 10-10
7.73
 1423
 1.09 × 10-5
 9.67 × 10-6
 11.2
 8.54 × 10-10
8.05
 1463
 1.09 × 10-5
 9.31 × 10-6
 14.6
 1.08 × 10-9
8.42
 1503
 1.09 × 10-5
 7.79 × 10-6
 28.4
 2.05 × 10-9
9.22
 1502
 1.08 × 10-5
 3.88 × 10-6
 64.2
 4.62 × 10-9
9.79
 1481
 1.08 × 10-5
 1.61 × 10-6
 85.0
 6.19 × 10-9
10.21
 1416
 1.07 × 10-5
 7.34 × 10-7
 93.2
 7.06 × 10-9

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