Optimization of Fenton process operating conditions for the treatment of the landfill leachate of Fez city (Morocco)

Response Surface Methodology (RSM)-Based Prediction and Optimization of the Fenton Process in Landfill Leachate Decolorization

“…To determine the correlation between the variables (X) and the responses (Y), a quadratic model was applied (Equation ( 2))-an adequate (second order) model. A linear model predicting the responses from entire experimental fields was also generated-approximating the interaction between the decolorization and the four independent variables [8]:…”

“…Furthermore, treatment efficiency could be reduced due to the refractory features of the leachate [6]. Other approaches, including adsorption, also require special reactors and work only against specific contaminants [7,8]. Alternatively, combined physicochemical processes can be used on the leachate to degrade and mineralize the refractory contaminants [9].…”

“…The Fenton process, one of AOPs, works by exploiting the vigorous oxidation potential of • OH radicals which results in the mineralization of resistant contaminants and biodegradability enhancement allowing for further treatment using biological techniques. The • OH radicals are produced concomitant to the catalysis reaction of hydrogen peroxide using ferrous ions [8]. The treatment system itself consists of pH adjustment, oxidation reaction, neutralization, coagulation, and settlement [10,11].…”