Optimization of fenton's oxidation by box-behnken design of response surface methodology for landfill leachate

Landfill leachate is one of the major concerns of the present society from environmental point of view. fenton's reagent serves as an effective treatment method for the removal of pollution load from landfill leachate. in the present study,the efficacy of response surface models was analysed to optimize experimental conditions for maximum removal of chemical oxygen demand,colour,phosphate and sulphate. the optimum conditions obtained by overlaying the responses were found to be initial ph 5,[h2o2]/ [fe2+] ratio 4 and [h2o2] 80 mm. after fenton's oxidation,overall reduction in chemical oxygen demand,phosphate,sulphate and colour removal of 84.2%,93.7%,97.5% and 82.47% respectively,was achieved. the chemical oxygen demand removal was significantly affected by h2o2 concentration and h2o2/feso4 molar ratio. h2o2 concentration and ph had noteworthy influence on phosphate and colour removal. the sulphate removal was significantly affected by h2o2/feso4 ratio and ph. the estimated overall optimum conditions by overlaying the responses of box-behnken design of response surface methodology were found to be initial ph 5,[h2o2]/ [fe2+] ratio 4 and [h2o2] 80 mm.