title: Electroplating sludge derived zinc-ferrite catalyst for the efficient photo-Fenton degradation of dye.
abstract: A zinc-dominant ferrite catalyst for efficient degradation of organic dye was prepared by the calcination of electroplating sludge (ES). Characterizations indicated that zinc ferrite (ZnFe2O4) coexisted with Fe2O3structure was the predominant phase in the calcined electroplating sludge (CES). CES displayed a high decolorization ratio (88.3%) of methylene blue (MB) in the presence of H2O2combined with UV irradiation. The high efficiency could be ascribed to the photocatalytic process induced by ZnFe2O4and the photo-Fenton dye degradation by ferrous content, and a small amount of Al and Mg in the sludge might also contribute to the catalysis. Moreover, the degradation capability of dye by CES was supported by the synthetic ZnFe2O4with different Zn to Fe molar ratio (n(Zn): n(Fe)), as 84.81%-86.83% of dye was removed with n(Zn): n(Fe) ranged from 1:0.5 to 1:3. All synthetic ferrite samples in the simulation achieved adjacent equilibrium decolorization ratio, the flexible proportioning of divalent metal ions (M2+) to trivalent metal ions (M3+) applied in the synthesis indicated that the catalyst has a high availability. Therefore, an efficacious catalyst for the degradation of dye can potentially be derived from heavy metal-containing ES, it's a novel approach for the reutilization of ES.
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, No. 333 Nanchen Rd, Shanghai 200444, PR China.
authors.forename: Zhenbang
authors.initials: Z
authors.lastname: Cao
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, No. 333 Nanchen Rd, Shanghai 200444, PR China.
authors.forename: Jia
authors.initials: J
authors.lastname: Zhang
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, No. 333 Nanchen Rd, Shanghai 200444, PR China.
authors.forename: Jizhi
authors.initials: J
authors.lastname: Zhou
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, No. 333 Nanchen Rd, Shanghai 200444, PR China.
authors.forename: Xiuxiu
authors.initials: X
authors.lastname: Ruan
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, No. 333 Nanchen Rd, Shanghai 200444, PR China.
authors.forename: Dan
authors.initials: D
authors.lastname: Chen
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, No. 333 Nanchen Rd, Shanghai 200444, PR China.
authors.forename: Jianyong
authors.initials: J
authors.lastname: Liu
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, No. 333 Nanchen Rd, Shanghai 200444, PR China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liu
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, No. 333 Nanchen Rd, Shanghai 200444, PR China. Electronic address: grqian@shu.edu.cn.
authors.forename: Guangren
authors.initials: G
authors.lastname: Qian
mesh_terms: D002384:Catalysis; D004595:Electroplating; D005290:Ferric Compounds / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D012722:Sewage / Q000737:chemistry*; D015032:Zinc
chemical_list: D005290:Ferric Compounds; D012722:Sewage; D006861:Hydrogen Peroxide; D007501:Iron; D015032:Zinc
keywords: Electroplating sludge; Fenton; Photocatalysis; Zinc ferrite