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Table 4

ANOVA results of the response surface quadratic model for TOC removal by the microwave-induced catalytic oxidation process

SourceDegrees of freedomSum of squaresMean squareF valuePr (>F)Remark
Modela 
 FO (X1, X2, X32,814.63 938.21 603.4079 1.352 × 10−11 Highly significant 
 TWI (X1, X2, X313.12 4.37 2.8118 0.093891 Significant 
 PQ (X1, X2, X3130.31 43.44 27.9371 3.556 × 10−5 Highly significant 
Residuals 10 15.55 1.55 – – – 
Lack of fit 14.31 2.86 11.5768 0.008872 Significant 
Pure error 1.24 0.25 ‒ ‒ ‒ 
SourceDegrees of freedomSum of squaresMean squareF valuePr (>F)Remark
Modela 
 FO (X1, X2, X32,814.63 938.21 603.4079 1.352 × 10−11 Highly significant 
 TWI (X1, X2, X313.12 4.37 2.8118 0.093891 Significant 
 PQ (X1, X2, X3130.31 43.44 27.9371 3.556 × 10−5 Highly significant 
Residuals 10 15.55 1.55 – – – 
Lack of fit 14.31 2.86 11.5768 0.008872 Significant 
Pure error 1.24 0.25 ‒ ‒ ‒ 

aFO, TWI, and PQ represent first-order, two-way interaction, and pure quadratic, respectively.

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