title: Enhanced heterogeneous photo-Fenton process modified by magnetite and EDDS: BPA degradation.
abstract: In this research, magnetite and ethylenediamine-N,N'-disuccinic acid (EDDS) are used in a heterogeneous photo-Fenton system in order to find a new way to remove organic contaminants from water. Influence of different parameters including magnetite dosage, EDDS concentration, H2O2concentration, and pH value were evaluated. The effect of different radical species including HO·and HO2·/O2·-was investigated by addition of different scavengers into the system. The addition of EDDS improved the heterogeneous photo-Fenton degradation of bisphenol A (BPA) through the formation of photochemically efficient Fe-EDDS complex. This effect is dependent on the H2O2and EDDS concentrations and pH value. The high performance observed at pH 6.2 could be explained by the ability of O2·-to generate Fe(II) from Fe(III) species reduction. GC-MS analysis suggested that the cleavage of the two benzene rings is the first degradation step followed by oxidation leading to the formation of the benzene derivatives. Then, the benzene ring was opened due to the attack of HO·radicals producing short-chain organic compounds of low molecular weight like glycerol and ethylene glycol. These findings regarding the capability of EDDS/magnetite system to promote heterogeneous photo-Fenton oxidation have important practical implications for water treatment technologies.
authors.affiliation: School of the Environment, Guangxi University, Nanning, 530004, People's Republic of China. huangwenyu@gxu.edu.cn.
authors.forename: Wenyu
authors.initials: W
authors.lastname: Huang
authors.affiliation: School of the Environment, Guangxi University, Nanning, 530004, People's Republic of China.
authors.forename: Mengqi
authors.initials: M
authors.lastname: Luo
authors.affiliation: School of Marine Science, Guangxi University, Nanning, 530004, China.
authors.forename: Chaoshuai
authors.initials: C
authors.lastname: Wei
authors.affiliation: School of Marine Science, Guangxi University, Nanning, 530004, China.
authors.forename: Yinghui
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Ecole Nationale Supérieure de Chimie de Rennes UMR CNRS 6226, 11 Allée de Beaulieu, CS 50837, 35708, Rennes Cedex 7, France.
authors.forename: Khalil
authors.initials: K
authors.lastname: Hanna
authors.affiliation: Institut de Chimie de Clermont-Ferrand, Université Clermont Auvergne, Université Blaise Pascal, BP 10448, 63000, Clermont-Ferrand, France. gilles.mailhot@univ-bpclermont.fr.|CNRS, UMR 6296, ICCF, 63171, Aubière, France. gilles.mailhot@univ-bpclermont.fr.
authors.forename: Gilles
authors.initials: G
authors.lastname: Mailhot
mesh_terms: D001559:Benzhydryl Compounds; D052203:Ferrosoferric Oxide; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D010084:Oxidation-Reduction; D010636:Phenols; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D052203:Ferrosoferric Oxide; D006861:Hydrogen Peroxide; D007501:Iron; D010636:Phenols; C006780:bisphenol A; D000098826:Bisphenol A Compounds
keywords: EDDS; Heterogeneous photo-Fenton; Magnetite; Radicals; Water treatment