Table 4 CCD design data with independent variables and results of ion exchange efficiency and capacity.

From: The study of cerium separation from aqueous solutions using Dowex 50WX8 resin via ion exchange in batch and continuous mode

Run

A (M)

B (\(\boldsymbol{^\circ{\rm C} }\))

C (g)

q (mg g−1)

\({IX\% }_{exp}\)

\({IX\% }_{pred}\)

1

0.2

35

0.16

15.379

98.427

99.491

2

0.4

25

0.09

20.957

75.446

71.198

3

0.4

25

0.23

9.697

89.218

84.79

4

0.4

45

0.09

21.744

78.281

74.565

5

0.4

45

0.23

9.894

91.026

89.628

6

0.6

35

0.02

36.602

29.282

32.686

7

0.6

15

0.16

9.069

58.043

57.950

8

0.6

35

0.16

10.974

70.239

64.121

9

0.6

35

0.16

10.869

69.565

64.121

10

0.6

35

0.16

10.286

65.717

64.121

11

0.6

35

0.16

10.754

64.826

64.121

12

0.6

35

0.16

9.918

63.478

64.121

13

0.6

35

0.16

10.342

66.195

64.121

14

0.6

55

0.16

11.803

75.543

71.896

15

0.6

35

0.3

6.760

81.130

73.991

16

0.8

25

0.09

8.126

29.256

23.695

17

0.8

25

0.23

5.963

54.857

49.938

18

0.8

45

0.09

9.816

35.339

32.803

19

0.8

45

0.23

7.056

64.901

60.515

20

1

35

0.16

4.328

27.684

22.876

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