Response 1

MB adsorption

ANOVA for selected factorial model

Sum of

Mean F

p-value

Source

Squaresdf Square Value Prob > F

Model 332.63

5

66.53

532.2

0.0019

significant

A-Contact Time 78.12

1

78.12

625

0.0016

B-Dosage 153.12

1

153.12

1225

0.0008

C-pH 45.12

1

45.12

361

0.0028

AC 28.12

1

28.12

225

0.0044

BC 28.13

1

28.13

225

0.0044

Residual 0.25

2

0.12

Cor Total 332.88

7

Std. Dev.

0.35

R-Squared

0.9992

Mean

84.88

Adj R-Squared

0.9974

C.V. %

0.42

Pred R-Squared

0.988

PRESS

4

Adeq Precision

64.503

The “Pred R-Squared” of 0.9880 is in reasonable agreement with the “Adj R-Squared” of 0.9974.

Coefficient

Standard

95% CI

95% CI

Factor Estimate

df

Error

Low

High

VIF

Intercept 84.88

1

0.12

84.34

85.41

A-Contact Time 3.12

1

0.12

2.59

3.66

1

B-Dosage 4.38

1

0.12

3.84

4.91

1

C-pH 2.37

1

0.12

1.84

2.91

1

AC-1.87

1

0.12

−2.41

1.34

1

BC 1.88

1

0.12

1.34

2.41

1