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Table 5 Solution analyses for strontium sorption to goethite in air, I = 0.1 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%

  

6.43

1299

1.10 × 10-4

1.06 × 10-4

3.9

3.34 × 10-9

not measured

6.85

1304

1.10 × 10-4

1.07 × 10-4

2.5

2.13 × 10-9

not measured

7.23

1307

1.10 × 10-4

1.08 × 10-4

1.8

1.49 × 10-9

not measured

7.62

1311

1.11 × 10-4

1.02 × 10-4

8.4

7.13 × 10-9

not measured

7.97

1309

1.11 × 10-4

1.03 × 10-4

6.8

5.71 × 10-9

not measured

8.29

1305

1.1 × 10-4

1.17 × 10-4

-5.8

-4.92 × 10-9

not measured

8.96

1304

1.10 × 10-4

6.18 × 10-4

43.7

3.68 × 10-8

not measured

9.28

1297

1.09 × 10-4

4.11 × 10-4

62.4

5.26 × 10-8

not measured

9.97

1278

1.08 × 10-4

2.30 × 10-5

78.8

6.68 × 10-8

not measured

Total Sr = 10-4 M aged for 14 days

± 5%

  

6.52

1478

1.11 × 10-4

1.09 × 10-4

1.9

1.43 × 10-9

1.47 × 10-4

7.03

1513

1.11 × 10-4

1.06 × 10-4

5.0

3.69 × 10-9

2.10 × 10-4

7.50

1523

1.12 × 10-4

1.01 × 10-4

9.5

6.97 × 10-9

3.76 × 10-4

8.12

1491

1.11 × 10-4

8.20 × 10-5

26.4

1.97 × 10-8

5.29 × 10-4

8.18

1507

1.11 × 10-4

6.84 × 10-5

38.4

2.83 × 10-8

6.38 × 10-4

9.19

1478

1.11 × 10-4

4.20 × 10-5

62.0

4.64 × 10-8

7.22 × 10-4

9.84

1484

1.10 × 10-4

2.17 × 10-5

80.2

5.93 × 10-8

8.93 × 10-4

10.59

1453

1.09 × 10-4

7.54 × 10-6

93.1

6.96 × 10-8

9.97 × 10-4

11.32

1416

1.06 × 10-4

2.15 × 10-6

98.0

7.34 × 10-8

1.07 × 10-3

Total Sr = 10-5 M aged for 2 days

± 5%

  

6.89

1301

1.17 × 10-5

9.81 × 10-6

16.4

1.48 × 10-9

not measured

7.18

1310

1.18 × 10-5

1.00 × 10-5

15.0

1.35 × 10-9

not measured

7.51

1309

1.18 × 10-5

9.49 × 10-6

19.6

1.77 × 10-9

not measured

7.86

1308

1.18 × 10-5

8.64 × 10-6

26.7

2.41 × 10-9

not measured

8.18

1304

1.18 × 10-5

7.36 × 10-6

37.4

3.37 × 10-9

not measured

8.76

1300

1.17 × 10-5

4.51 × 10-6

61.4

5.52 × 10-9

not measured

9.44

1293

1.16 × 10-5

3.45 × 10-6

70.4

6.34 × 10-9

not measured

10.05

1285

1.15 × 10-5

7.57 × 10-7

93.4

8.40 × 10-9

not measured

Total Sr = 10-5 M aged for 14 days

± 5%

  

6.60

1484

1.30 × 10-5

1.25 × 10-5

3.1

2.74 × 10-10

1.04 × 10-4

7.17

1482

1.30 × 10-5

1.27 × 10-5

2.4

2.09 × 10-10

2.08 × 10-4

8.36

1441

1.30 × 10-5

7.73 × 10-6

40.6

3.66 × 10-9

5.83 × 10-4

9.36

1488

1.29 × 10-5

2.06 × 10-6

84.1

7.30 × 10-9

8.14 × 10-4

9.92

1491

1.28 × 10-5

6.79 × 10-7

94.7

8.15 × 10-9

9.33 × 10-4

10.55

1485

1.27 × 10-5

1.33 × 10-7

99.0

8.46 × 10-9

1.08 × 10-3

Total Sr = 1.3 × 10-6 M aged for 2 days

(± 12%)

  

6.28

1296

1.28 × 10-6

1.19 × 10-6

7.1

7.03E × 10-11

not measured

6.58

1302

1.29 × 10-6

1.31 × 10-6

-1.5

-1.50 × 10-11

not measured

7.08

1306

1.29 × 10-6

1.11 × 10-6

14.1

1.39 × 10-10

not measured

7.38

1131

1.27 × 10-6

1.11 × 10-6

12.6

1.41 × 10-10

not measured

7.65

1090

1.26 × 10-6

9.95 × 10-7

21.1

2.43 × 10-10

not measured

8.09

1057

1.25 × 10-6

7.21 × 10-7

42.4

5.02 × 10-10

not measured

8.78

1055

1.25 × 10-6

3.55 × 10-7

71.5

8.45 × 10-10

not measured

9.49

970

1.23 × 10-6

1.26 × 10-7

89.8

1.14 × 10-9

not measured

10.05

884

1.21 × 10-6

3.44 × 10-8

97.2

1.33 × 10-9

not measured