title: Optimization of leachate treatment using persulfate/H2O2 based advanced oxidation process: case study: Deir El-Balah Landfill Site, Gaza Strip, Palestine.
abstract: The objective of this study was to investigate the performance of employing H2O2 reagent in persulfate activation to treat stabilized landfill leachate. A central composite design (CCD) with response surface methodology (RSM) was applied to evaluate the relationships between operating variables, such as persulfate and H2O2 dosages, pH, and reaction time, to identify the optimum operating conditions. Quadratic models for the following two responses proved to be significant with very low probabilities (<0.0001): chemical oxygen demand (COD) and NH3-N removal. The obtained optimum conditions included a reaction time of 116 min, 4.97 g S2O8(2-), 7.29 g H2O2 dosage and pH 11. The experimental results were corresponding well with predicted models (COD and NH3-N removal rates of 81% and 83%, respectively). The results obtained in the stabilized leachate treatment were compared with those from other treatment processes, such as persulfate only and H2O2 only, to evaluate its effectiveness. The combined method (i.e., /S2O8(2-)/H2O2) achieved higher removal efficiencies for COD and NH3-N compared with other studied applications.
authors.affiliation: Department of Environmental Health, High Institute of Public Health, Alexandria University, Alexandria, Egypt; Environmental Quality Authority, Gaza, Gaza Strip, Palestine.
authors.forename: Ahmed H
authors.initials: AH
authors.lastname: Hilles
authors.affiliation: Malaysian Institute of Chemical and Bio Engineering Technology, Universiti Kuala Lumpur, (UNIKL, MICET), Melaka, Malaysia E-mail: sabuamr@hotmail.com.
authors.forename: Salem S
authors.initials: SS
authors.lastname: Abu Amr
authors.affiliation: Department of Environmental Health, High Institute of Public Health, Alexandria University, Alexandria, Egypt.
authors.forename: Rim A
authors.initials: RA
authors.lastname: Hussein
authors.affiliation: Department of Environmental Health, High Institute of Public Health, Alexandria University, Alexandria, Egypt.
authors.forename: Anwar I
authors.initials: AI
authors.lastname: Arafa
authors.affiliation: Department of Environmental Health, High Institute of Public Health, Alexandria University, Alexandria, Egypt.
authors.forename: Olfat D
authors.initials: OD
authors.lastname: El-Sebaie
mesh_terms: D064751:Ammonium Compounds / Q000302:isolation & purification*; D057919:Biological Oxygen Demand Analysis; D006861:Hydrogen Peroxide / Q000737:chemistry*; D008877:Middle East; D008956:Models, Chemical; D008962:Models, Theoretical; D010084:Oxidation-Reduction; D017670:Sodium Compounds / Q000737:chemistry*; D013431:Sulfates / Q000737:chemistry*; D064091:Waste Disposal Facilities; D014874:Water Pollutants, Chemical; D018508:Water Purification / Q000379:methods*
chemical_list: D064751:Ammonium Compounds; D017670:Sodium Compounds; D013431:Sulfates; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide; C024625:sodium persulfate