Table 2 BBD design matrix for the independent variables.

From: Identification of influential parameters and conditions in heavy metals adsorption onto Cal-LDH-PC using optimization approaches of RSM and Taguchi

Run

A

B

C

D

1

20

5

0.55

7

2

160

5

0.55

7

3

20

180

0.55

7

4

160

180

0.55

7

5

90

92.5

0.1

5

6

90

92.5

1

5

7

90

92.5

0.1

9

8

90

92.5

1

9

9

20

92.5

0.55

5

10

160

92.5

0.55

5

11

20

92.5

0.55

9

12

160

92.5

0.55

9

13

90

5

0.1

7

14

90

180

0.1

7

15

90

5

1

7

16

90

180

1

7

17

20

92.5

0.1

7

18

160

92.5

0.1

7

19

20

92.5

1

7

20

160

92.5

1

7

21

90

5

0.55

5

22

90

180

0.55

5

23

90

5

0.55

9

24

90

180

0.55

9

25

90

92.5

0.55

7

26

90

92.5

0.55

7

27

90

92.5

0.55

7