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Table 3 Analysis of variance (ANOVA)

From: Parametric modelling and analysis to optimize adsorption of Atrazine by MgO/Fe3O4-synthesized porous carbons in water environment

Source

Sum of squares

df

Mean Square

F value

P value

Model

11,592.18

14

828.01

2.22

0.0397a

X1-Conc

594.02

1

594.02

1.59

0.2185b

X2-pH

1972.91

1

1972.91

5.29

0.0301a

X3-Dosage

49.31

1

49.31

0.1322

0.7192b

X4-Temp

750.4

1

750.4

2.01

0.1684b

X1X2

870.25

1

870.25

2.33

0.1391b

X1X3

244.92

1

244.92

0.6569

0.4253b

X1X4

132.25

1

132.25

0.3547

0.5568b

X2X3

142.8

1

142.8

0.383

0.5416b

X2X4

3819.24

1

3819.24

10.24

0.0037a

X3X4

1572.12

1

1572.12

4.22

0.0506b

X12

529.68

1

529.68

1.42

0.2445b

X22

0.0999

1

0.0999

0.0003

0.9871b

X32

815.59

1

815.59

2.19

0.1516b

X42

159.1

1

159.1

0.4267

0.5196b

Residual

9321.53

25

372.86

  

Lack of fit

3318.79

10

331.88

0.8293

0.6089b

Pure error

6002.75

15

400.18

  

Cor total

20,913.72

39

   
  1. aSignificant (P < 0.05),bNon-significant (P > 0.05)