Study on Coupled Oxidation and Microwave Process in Treating Urban Landfill Leachate by Fenton and Fenton-like Reaction

摘要

In study,Microwave Irradiation enhanced Fenton-Like Process was introduced as a novel technology in the treatment of Landfill Leachate containing refractory organic matters.The sample leachate with initial COD loading of 11434 ～12067 mg·L-l was collected from the Laohuchong (Shenyang,China) City Landfill.Fenton (FeSO4/H2O2) and Fenton-like (iron tailings/H2O2) reagents coupling with Microwave Irradiation were both studied.The Microwave Irradiation enhanced Fenton-Like Process was conducted under the optimal conditions as follows:480W of microwave power,3 min of radiation time,3.0 of initial pH,100mL·L-1 of H2O2 and 2g·L-1 of iron tailings.The removal rates of leachate samples with initial COD =11928 mg·L-l using 1.5g.L-l FeSO4 and 2.0g.L-1 iron tailings are 45.1％ and 42.3％ respectively on the condition of 320W MW radiated for 3 min at room temperature.The highest removal rate of the MW Fenton-Like Process is about 46％ under the optimum conditions.It demonstrates the Fenton-Like reagent can be used as a substitution of Fenton reagent in Landfill Leachate applications which has extensive application prospect and extraordinary significance in aspects of resource utilization of waste materials and cost saving.