title: MnFe2O4nanoparticles as new catalyst for oxidative degradation of phenol by peroxydisulfate.
abstract: Manganese ferrite nanopowder was prepared by thermal decomposition at 400°C of the gel synthesized from manganese and iron nitrates and polyvinyl alcohol. X-ray diffractometry evidenced that manganese ferrite was formed as single crystalline phase at this temperature. Scanning electron microscope images evidenced the formation of very fine spherical particles (d<11nm) of manganese ferrite, with specific surface area of 147m2/g. The powder obtained at 400°C was used as a catalyst for the oxidative degradation of phenol in aqueous solutions, in the presence of potassium peroxydisulfate as oxidant. High phenol removal efficiencies above 90% were reached at: pH 3-3.5, phenol initial concentration around 50mg/L, peroxydisulfate:phenol mass ratio 10:1, and catalyst dose 3g/L. Total organic carbon measurements showed that the degradation of phenol goes, under these conditions, to mineralization in an extent of 60%.
authors.affiliation: Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, RO-300223 Timişoara, Romania; Research Institute for Renewable Energy, Politehnica University Timisoara, RO-300006, Timisoara, Romania. Electronic address: marcela.stoia@upt.ro.
authors.forename: Marcela
authors.initials: M
authors.lastname: Stoia
authors.affiliation: Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, RO-300223 Timişoara, Romania; Research Institute for Renewable Energy, Politehnica University Timisoara, RO-300006, Timisoara, Romania. Electronic address: cornelia.muntean@upt.ro.
authors.forename: Cornelia
authors.initials: C
authors.lastname: Muntean
authors.affiliation: Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, RO-300223 Timişoara, Romania.
authors.forename: Bogdan
authors.initials: B
authors.lastname: Militaru
mesh_terms: D002384:Catalysis; D005290:Ferric Compounds / Q000737:chemistry*; D017895:Manganese Compounds / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction; D019800:Phenol / Q000737:chemistry*; D013431:Sulfates / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
chemical_list: D005290:Ferric Compounds; D017895:Manganese Compounds; D013431:Sulfates; D014874:Water Pollutants, Chemical; C551151:manganese ferrite; D019800:Phenol
keywords: Catalytic oxidation; Manganese ferrite; Nanoparticles; Peroxydisulfate; Phenol