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Table 1 Solution analyses for strontium sorption to amorphous silica in nitrogen atmosphere, 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 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