title: Multiple responses analysis and modeling of Fenton process for treatment of high strength landfill leachate.
abstract: Landfill leachate is one of the most recalcitrant wastes for biotreatment and can be considered a potential source of contamination to surface and groundwater ecosystems. In the present study, Fenton oxidation was employed for degradation of stabilized landfill leachate. Response surface methodology was applied to analyze, model and optimize the process parameters, i.e. pH and reaction time as well as the initial concentrations of hydrogen peroxide and ferrous ion. Analysis of variance showed that good coefficients of determination were obtained (R2 > 0.99), thus ensuring satisfactory agreement of the second-order regression model with the experimental data. The results indicated that, pH and its quadratic effects were the main factors influencing Fenton oxidation. Furthermore, antagonistic effects between pH and other variables were observed. The optimum H2O2 concentration, Fe(II) concentration, pH and reaction time were 0.033 mol/L, 0.011 mol/L, 3 and 145 min, respectively, with 58.3% COD, 79.0% color and 82.1% iron removals.
authors.affiliation: School of Civil Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia.
authors.forename: Soraya
authors.initials: S
authors.lastname: Mohajeri
authors.forename: Hamidi Abdul
authors.initials: HA
authors.lastname: Aziz
authors.forename: Mohammed Ali
authors.initials: MA
authors.lastname: Zahed
authors.forename: Leila
authors.initials: L
authors.lastname: Mohajeri
authors.forename: Mohammed J K
authors.initials: MJ
authors.lastname: Bashir
authors.forename: Shuokr Qarani
authors.initials: SQ
authors.lastname: Aziz
authors.forename: Mohd Nordin
authors.initials: MN
authors.lastname: Adlan
authors.forename: Mohamed Hasnain
authors.initials: MH
authors.lastname: Isa
mesh_terms: D000332:Aerobiosis; D006861:Hydrogen Peroxide; D007501:Iron; D016015:Logistic Models; D008962:Models, Theoretical; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
chemical_list: C045076:Fenton's reagent; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide; D007501:Iron