International Journal of Photoenergy / 2012 / Article / Tab 4

Research Article

Photo-Fenton and Fenton Oxidation of Recalcitrant Industrial Wastewater Using Nanoscale Zero-Valent Iron

Table 4

COD and TOC reductions (%) with dark-Fenton and photo-Fenton experiments.

Coded variablesDark-FentonPhoto-Fenton
χ 1χ 2χ 3Run% COD reduction% TOC reductionRun% COD reduction% TOC reduction

+1+1−11.142.621.42.178.459.4
−1+1−11.234.617.32.270.650.0
0001.342.021.42.380.557.8
0001.439.319.92.478.256.7
−1+1+11.535.619.02.577.656.0
−1−1+11.635.118.92.676.153.9
0001.738.424.22.761.361.7
+1+1+11.843.523.02.860.361.7
+1−1+11.977.550.32.981.661.6
+1−1−11.1049.234.92.1078.558.0
−1−1−11.1138.324.72.1170.953.6

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