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Table 5 ANOVA for quadratic model and its removal efficiency

From: Adsorption of chromium from electroplating wastewater using activated carbon developed from water hyacinth

Source

Sum of Squares

df

Mean Square

F-value

p-value

 

Model

10,689.37

9

1187.71

60.01

 < 0.0001

Significant

A-pH

814.84

1

814.84

41.17

 < 0.0001

 

B-adsorbent dos

5146.30

1

5146.30

260.03

 < 0.0001

 

C-contact time

2199.30

1

2199.30

111.13

 < 0.0001

 

AB

213.44

1

213.44

10.78

0.0082

 

AC

59.90

1

59.90

3.03

0.1125

 

BC

0.0177

1

0.0177

0.0009

0.9767

 

A2

128.09

1

128.09

6.47

0.0292

 

B2

288.18

1

288.18

14.56

0.0034

 

C2

6.19

1

6.19

0.3126

0.5884

 

Residual

197.91

10

19.79

   

Cr Total

10,887.28

19

    
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BMC Chemistry

ISSN: 2661-801X

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