Removal of refractory pollutants in landfill leachate by Fenton process

Fenton process was chosen to treat the landfill leachate that had been biologically pre-treated.The experimental results showed that Fenton process possessed dual functions of oxidation and coagulation.The optimal operation conditions were determined as follows: =38.8 mmol/L,=30 mmol/L,initial pH=3,coagulation pH=8,60 min reaction time with H2O2 added at one time.Under this optimum condition,the COD and TOC removal efficiency was up to 63.43% and 80.58% respectively.Meanwhile,the mechanism of all affecting factors on Fenton process treatment efficiency was analyzed based on the experimental results.