Photo-Fenton and Fenton Oxidation of Recalcitrant Industrial Wastewater Using Nanoscale Zero-Valent Iron
Table 5
Results of statistical analyses of independent variables.
Dark-Fenton
Photo-Fenton
COD reduction
TOC reduction
COD reduction
TOC reduction
Term
Effect
Effect
Effect
Effect
Constant
0.00
0.00
0.00
0
H2O2 : COD Ratio
17.3
0.01
12.4
0.02
0.9
0.91
6.8
0.07
H2O2 : nZVI Ratio
−11.0
0.02
−12.0
0.02
−5.0
0.57
0.0
0.99
Doses
6.8
0.04
3.3
0.12
−0.7
0.94
3.0
0.24
H2O2 : COD Ratio * H2O2 : nZVI Ratio
−9.3
0.02
−8.4
0.03
−5.7
0.52
0.9
0.68
H2O2 : COD Ratio * Dose
7.8
0.03
5.2
0.08
−6.8
0.46
0.0
0.99
H2O2 : nZVI Ratio * Dose
−5.8
0.05
−1.6
0.40
−4.9
0.58
1.2
0.57
H2O2 : COD Ratio * H2O2 : nZVI Ratio*Dose
−8.0
0.02
−5.3
0.07
−5.7
0.52
−1.8
0.43
Ct Pt
0.07
0.01
0.91
0.39
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