Table 1 Factors, levels, observed and predicted responses with residuals.

From: Investigation of cadmium removal using tin oxide nanoflowers through process optimization, isotherms and kinetics

 

Factor 1

Factor 2

Factor 3

   

Batch no.

A: pH

B: Adsorbent amount, mg

C: Mixing period, min

Observed response, Y0

Predicted response, Yp

Rounded residuals

(Y0-Yp)

Error (%)

1

5

25

35

81.44

80.71

0.73

0.90

2

5

25

5

78.49

79.25

-0.75

0.96

3

7

15

35

92.19

90.72

1.47

1.59

4

7

25

20

96.41

97.52

-1.11

1.15

5

5

35

20

91.62

90.25

1.37

1.49

6

9

35

20

98.37

96.09

2.28

2.31

7

7

25

20

98.48

97.52

0.96

0.97

8

7

15

5

89.58

89.26

0.32

0.35

9

9

25

35

98.91

100.57

-1.66

1.68

10

7

25

20

97.68

97.52

0.17

0.17

11

9

25

5

98.93

99.10

-0.18

0.18

12

9

15

20

98.88

99.32

-0.44

0.44

13

7

25

20

98.62

97.52

1.10

1.11

14

7

35

5

98.80

100.05

-1.24

1.26

15

7

25

20

98.26

97.52

0.74

0.75

16

5

15

20

64.10

65.45

-1.35

2.10

17

7

35

35

99.11

101.51

-2.40

2.42

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