Advances in Environmental Chemistry / 2014 / Article / Tab 3

Research Article

Experimental Design of Photo-Fenton Reactions for the Treatment of Car Wash Wastewater Effluents by Response Surface Methodological Analysis

Table 3

RSM for the three experimental variables in coded units and corresponding natural values.

Experiment numberNatural variableCoded variable
Fe2+ (mg/L)H2O2 (mg/L)pH

1303506
2304506
3503506
4504506
5403503.5
6403508.5
7404503.5
8404508.5
9304003.5
10504003.5
11304008.5
12504008.5
13404006
14404006
15404006