title: Statistical optimization of process parameters for landfill leachate treatment using electro-Fenton technique.
abstract: Mature landfill leachate is typically non-biodegradable and contains high concentration of refractory organics. The aim of this research was to optimize operating parameters in electro-Fenton process, for the removal of recalcitrant organics from semi-aerobic landfill leachate using response surface methodology (RSM). Effectiveness of important process parameters H(2)O(2)/Fe(2+) molar ratio, current density, pH and reaction time were determined, optimized and modeled successfully. Significant quadratic polynomial models were obtained (R(2)=0.9972 and 0.9984 for COD and color removals, respectively). Numerical optimization based on desirability function were employed; in a 43 min trial 94.07% of COD and 95.83% of color were removed at pH 3 and H(2)O(2)/Fe(2+) molar ratio 1, while current density was 49 mA/cm(2). The results indicate that E-Fenton process was an effective technology for semi-aerobic landfill leachate treatment.
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: Mohamed Hasnain
authors.initials: MH
authors.lastname: Isa
authors.forename: Mohammad Ali
authors.initials: MA
authors.lastname: Zahed
authors.forename: Mohd Nordin
authors.initials: MN
authors.lastname: Adlan
mesh_terms: D003116:Color; D055664:Electrochemical Techniques / Q000379:methods*; D052918:Environmental Restoration and Remediation / Q000379:methods; D006861:Hydrogen Peroxide; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D009930:Organic Chemicals; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D009930:Organic Chemicals; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide