Table 5 Fit summary for simultaneous biosorption of Cobalt by E. intestinalis achieved by the FCCCD.

From: Bioprocess development for biosorption of cobalt ions and Congo red from aquatic mixture using Enteromorpha intestinalis biomass as sustainable biosorbent

Source

Sum of squares

df

Mean square

F-value

P-value

Prob > F

Lack of fit tests

Linear

3366.23

37

90.98

47.74

< 0.0001*

2FI

1349.73

27

49.99

26.23

< 0.0001*

Quadratic

33.02

22

1.50

0.79

0.6901

Source

Sum of squares

df

Mean square

F-value

P-value

Prob > F

Sequential model sum of squares

Linear vs mean

15,321.12

5

3064.22

39.89

< 0.0001*

2FIvs linear

2016.51

10

201.65

5.03

0.0002*

Quadratic vs 2FI

1316.70

5

263.34

164.72

< 0.0001*

Source

Standard deviation

R-squared

Adjusted R-squared

Predicted R-squared

PRESS

Model summary statistics

Linear

8.76

0.8193

0.7987

0.7632

4428.56

2FI

6.33

0.9271

0.8950

0.9127

1631.83

Quadratic

1.26

0.9975

0.9958

0.9925

140.65

  1. *Significant values, df , degree of freedom; PRESS, sum of squares of prediction error; two factors interaction, 2FI.
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