Table 4 Model fit summary response 1  % removal efficiency RR-45-D.

From: Removal of reactive red 45 dye from aqueous solution using activated carbon developed from Catha edulis stem as a potential biosorbent

Source

Sequential p-value

Lack of Fit p-value

Adjusted R²

Predicted R²

 

Linear

< 0.0001

0.0030

0.9207

0.8931

 

2FI

0.0297

0.0068

0.9467

0.9021

 

Quadratic

< 0.0001

0.1828

0.9886

0.9681

Suggested

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