title: Degradation of Amaranth azo dye in water by heterogeneous photo-Fenton process using FeWO4 catalyst prepared by microwave irradiation.
abstract: FeWO4 particles were synthesized by a simple, rapid and facile microwave technique and their catalytic properties in heterogeneous photo-Fenton reaction were evaluated. This material was employed in the degradation of Amaranth azo dye. Individual and interactive effects of operational parameters such as pH, dye concentration and H2O2 dosage on the decolorization efficiency of Amaranth dye were evaluated by 2(3) central composite design. According to characterization techniques, a porous material and a well-crystallized phase of FeWO4 oxide were obtained. Regarding the photo-Fenton reaction assays, up to 97% color and 58% organic carbon removal were achieved in the best experimental conditions. In addition, the photo-Fenton process maintained treatment efficiency over five catalyst reuse cycles to indicate the durability of the FeWO4 catalyst. In summary, the results reveal that the synthesized FeWO4 material is a promising catalyst for wastewater treatment by heterogeneous photo-Fenton process.
authors.affiliation: Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria 97105-900, Brazil E-mail: efoletto@gmail.com.
authors.forename: Eric
authors.initials: E
authors.lastname: da Cruz Severo
authors.affiliation: Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria 97105-900, Brazil E-mail: efoletto@gmail.com.
authors.forename: Chayene Gonçalves
authors.initials: CG
authors.lastname: Anchieta
authors.affiliation: Pharmacy Undergraduate Course, Federal University of Santa Maria, Santa Maria 97105-900, Brazil.
authors.forename: Vitória Segabinazzi
authors.initials: VS
authors.lastname: Foletto
authors.affiliation: Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria 97105-900, Brazil E-mail: efoletto@gmail.com.
authors.forename: Raquel Cristine
authors.initials: RC
authors.lastname: Kuhn
authors.affiliation: Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria 97105-900, Brazil E-mail: efoletto@gmail.com.
authors.forename: Gabriela Carvalho
authors.initials: GC
authors.lastname: Collazzo
authors.affiliation: Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria 97105-900, Brazil E-mail: efoletto@gmail.com.
authors.forename: Marcio Antonio
authors.initials: MA
authors.lastname: Mazutti
authors.affiliation: Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria 97105-900, Brazil E-mail: efoletto@gmail.com.
authors.forename: Edson Luiz
authors.initials: EL
authors.lastname: Foletto
mesh_terms: D000548:Amaranth Dye / Q000737:chemistry*; D001391:Azo Compounds / Q000737:chemistry; D002384:Catalysis; D003116:Color; D004396:Coloring Agents; D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D008872:Microwaves; D010087:Oxides / Q000138:chemical synthesis*; D010782:Photolysis; D017973:Tungsten Compounds / Q000138:chemical synthesis*; D014867:Water; D018508:Water Purification / Q000379:methods*
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; C045076:Fenton's reagent; D010087:Oxides; D017973:Tungsten Compounds; D014867:Water; D000548:Amaranth Dye; D006861:Hydrogen Peroxide; D007501:Iron