EFFECTS OF IMPORTANT REACTION CONDITIONS ON LANDFILL LEACHATE TREATMENT BY FENTON PROCESS

摘要

A semi-batch mode was employed to treat landfill leachate by Fenton process. The results showed that the statistical model, which was established from the treatment of circulated leachate, could not predict COD removal efficiency well, when young leachate was treated. Both COD and TOC of the leachate decreased during Fenton oxidation, but less TOC was removed than COD. This was due to the increase of average oxidation state. COD removal changed little, when ferrous ion dose was fixed at 0.044 mol/L, and hydrogen peroxide to ferrous ion molar ratio was changed from 2.86 to 7.03. When hydrogen peroxide to ferrous ion molar ratio was fixed at 4.0, COD removal would increase and reach over 80% with the increase of hydrogen peroxide to initial COD molar ratio.