Fenton's Reagent Oxidation can significantly enhance the COD removal efficiency of landfill leachate. The results presented in this thesis show that the maximum amount of COD that could be removed by Fenton's Reagent Oxidation was about 80% of the initial value. Such a maximum removal was achieved using reagent dosage of 300 mg/L of H₂O₂, 55.84 mg/L of Fe ²⁺, and a pH of 3 at 25°C.

A mechanistic model was developed based on the kinetic reactions. A coefficient α, representing the proportional constant between organic matter and COD was firstly introduced to this model. This model fit the data well. The modeling coefficients of α, [·OH] and k₇ are 0.013mol mg^-1, 1.65×10^-9 M and 1.55×10^-9 M^-1 s^-1, respectively. Hydroxyl radical concentration was calculated and the results confirm the pseudo steady state assumption. Response surface design and analysis results predicted that COD remaining can achieve the lowest value of 48 mg/L with the treatment conditions of a reaction time of 3.8 hours, a pH of 2.3, and a mass ratio of H₂ O₂ to Fe²⁺ of 38 at 60°C.