Table 7 The ANOVA results for the adsorption of AA on the modified RH.

From: Improving adsorption performance of l-ascorbic acid from aqueous solution using magnetic rice husk as an adsorbent: experimental and RSM modeling

Source

Squares sum of

df

Square mean

F-value

P-value

Model

5557.14

9

617.46

102.15

> 0.0001

A-Concentration

1113.18

1

1113.18

184.16

> 0.0001

B-Sorbent

588.90

1

588.90

97.43

> 0.0001

C-Time

3649.34

1

3649.34

603.75

> 0.0001

AB

0.64

1

0.64

0.11

0.007519

AC

3.18

1

3.18

0.53

0.004852

BC

71.40

1

71.40

11.81

0.0064

A2

10.25

1

10.25

1.70

0.2221

B2

19.73

1

19.73

3.26

0.1009

C2

97.84

1

97.84

16.19

0.0024

Residual

60.44

10

6.04

  

Lack of fit

50.94

5

10.19

 

0.0445

Pure error

9.50

5

1.90

5.36

 

Cor total

5617.59

19