title: Synthesis of magnetic alginate beads based on Fe3O4 nanoparticles for the removal of 3-methylindole from aqueous solution using Fenton process.
abstract: A novel magnetic heterogeneous catalyst has been developed by incorporation of iron(II) and magnetic functionalized nanoparticles Fe3O4 in alginate beads with the aim of using them in the advanced Fenton oxidation of a malodorous compound (3 methyl-indole: 3-MI). The effects of significant operational parameters such as initial pH, oxidant concentration and catalyst amount were investigated and optimized for a better removal of 3-MI at initial concentration of 20mgL(-1). Besides, the catalyst stability was evaluated according to the iron leached into the aqueous solution. Results revealed that the parameters affecting Fenton catalysis must be carefully chosen to avoid excessive iron release. Under optimized conditions, the magnetic catalyst exhibited a good catalytic performance. Total removal of 3 methyl indole and a remarkable organic mineralization, without significant leaching of iron, were attained within 120min at pH 3.0 by using 0.4gL(-1) of Fe-MABs and 9.8mmolL(-1) of H2O2. The novel magnetic catalyst would be of potential application due to its high efficiency, easy recovery and good structural stability.
authors: Laboratory of Analytical Chemistry and Electrochemistry, National Institute of Applied Sciences and Technology, Carthage University, Centre Urbain Nord B.P. No. 676, 1080 Tunis Cedex, Tunisia. Electronic address: Samiabenhammouda@gmail.com.
authors: Samia Ben
authors: SB
authors: Hammouda
authors: Laboratory of Analytical Chemistry and Electrochemistry, National Institute of Applied Sciences and Technology, Carthage University, Centre Urbain Nord B.P. No. 676, 1080 Tunis Cedex, Tunisia.
authors: Nafaâ
authors: N
authors: Adhoum
authors: Laboratory of Analytical Chemistry and Electrochemistry, National Institute of Applied Sciences and Technology, Carthage University, Centre Urbain Nord B.P. No. 676, 1080 Tunis Cedex, Tunisia.
authors: Lotfi
authors: L
authors: Monser
mesh_terms: D000464:Alginates / Q000737:chemistry*; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D060328:Magnetic Phenomena; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D012862:Skatole / Q000737:chemistry*; D012996:Solutions; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
chemical_list: D000464:Alginates; D006603:Hexuronic Acids; D058185:Magnetite Nanoparticles; D012996:Solutions; D014874:Water Pollutants, Chemical; D020723:Glucuronic Acid; D012862:Skatole; D006861:Hydrogen Peroxide
keywords: Alginate; Catalyst; Fenton; Magnetic nanoparticles; Malodorous