Statistical Experiment Design Approach for the Treatment of Landfill Leachate by Photoelectro-Fenton Process

The influence of different variables in the photoelectro-Fenton process for the treatment of landfill leachate was investigated using an experimental design methodology. The variables considered in this study include ferrous ion dosage, hydrogen peroxide concentration, and current density. Response factors were color removal and chemical-oxygen demand (COD) removal efficiency after a 90-min reaction. The response surface methodology models were derived based on the results of color removal and COD removal, and the response surface plots were developed accordingly. The organic components before and after application of the photoelectro-Fenton process were investigated by gas chromatography-mass spectroscopy.