Variation source

Sum of squares

DF

Mean sum of squares

F

p

Contribution (%)

pH

13.3416

1

13.3416

6.1950

0.024205

*

2.1

Fe²⁺

94.6594

1

94.6594

43.9539

0.000006

*

15.0

pH/Fe²⁺

1.7633

1

1.7633

0.8188

0.378960

0.3

H₂O₂

80.6292

1

80.6292

37.4392

0.000015

*

12.8

pH/H₂O₂

1.7887

1

1.7887

0.8306

0.375632

0.3

H₂O₂/Fe²⁺

1.3661

1

1.3661

0.6343

0.437435

0.2

O₃/UV

0.3172

1

0.3172

0.1473

0.706190

0.1

O₃

20.8645

1

20.8645

9.6882

0.006701

*

3.3

pH/O₃

4.0830

1

4.0830

1.8959

0.187498

0.6

Stirring

0.2190

1

0.2190

0.1017

0.753909

0.0

pH/Stirring

1.2061

1

1.2061

0.5600

0.465111

0.2

Temperature

24.3201

1

24.3201

11.2927

0.003979

*

3.9

pH/Temperature

16.5279

1

16.5279

7.6745

0.013652

2.6

pH/UV

0.0286

1

0.0286

0.0133

0.909634

0.0

UV

333.7682

1

333.7682

154.9811

0.000000

*

53.0

Residue

34.4577

16

2.1536

Total

629.3408

31

R² = 94.5