Table 2 Experimental conditions and results of central composite design.

From: 4-Chlorophenol adsorption from water solutions by activated carbon functionalized with amine groups: response surface method and artificial neural networks

Run

X1

X2

X3

X4

Pre. (RSM) (%)

A.C. (%)

Run

X1

X2

X3

X4

Pre. (RSM) (%)

Pre. (ANN) (%)

AC. (%)

1

7

35

0.55

110

83.520

87.277

23

5.45

25.32

0.72

144.86

79.141

75.26

76.337

2

7

35

0.55

110

83.520

89.855

24

8.55

44.68

0.72

144.86

71.118

70.17

70.169

3

8.55

44.68

0.37

144.86

38.125

40.313

25

7

10

0.55

110

42.665

41.82

41.824

4

7

35

0.55

110

83.520

92.353

26

7

35

0.55

110

83.520

84.65

77.967

5

5.45

25.32

0.72

75.14

96.867

92.569

27

7

35

1

110

87.736

90.84

90.836

6

5.45

44.68

0.72

75.14

96.546

91.264

28

7

35

0.55

110

83.520

84.65

80.837

7

8.55

25.32

0.37

75.14

43.826

46.876

29

7

35

0.55

20

60.434

64.51

63.126

8

8.55

44.68

0.72

75.14

65.569

65.436

30

7

35

0.55

110

83.520

84.65

80.527

9

8.55

25.32

0.72

144.86

49.748

50.273

31

7

35

0.55

200

28.110

29.28

29.284

10

7

35

0.55

110

83.520

76.255

32

7

35

0.55

110

83.520

84.65

83.836

11

7

35

0.55

110

83.520

86.247

33

11

35

0.55

110

14.224

25.76

10.029

12

7

35

0.55

110

83.520

85.374

34

7

35

0.55

110

83.520

84.65

84.625

13

5.45

44.68

0.37

75.14

72.941

70.305

35

7

35

0.55

110

83.520

84.65

80.164

14

8.55

25.32

0.37

144.86

14.467

16.600

36

7

35

0.55

110

83.520

84.65

81.839

15

5.45

44.68

0.37

144.86

63.641

61.886

37

7

35

0.55

110

83.520

84.65

83.873

16

5.45

25.32

0.37

144.86

40.006

38.027

38

7

60

0.55

110

72.717

75.97

75.973

17

7

35

0.55

110

83.520

82.893

39

7

35

0.55

110

83.520

84.65

79.935

18

5.45

25.32

0.37

75.14

70.973

68.774

40

7

35

0.55

110

83.520

84.65

84.456

19

7

35

0.55

110

83.520

81.298

41

3

35

0.55

110

87.290

95.35

95.352

20

5.45

44.68

0.72

144.86

94..487

95.326

42

7

35

0.55

110

83.520

84.65

84.368

21

8.55

25.32

0.72

75.14

65.867

64.473

43

7

35

0.1

110

13.487

13.58

12.824

22

8.55

44.68

0.37

75.14

45.817

45.473

44

7

35

0.55

110

83.520

84.65

92.837