title: Novel mesoporous FeAl bimetal oxides for As(III) removal: Performance and mechanism.
abstract: In this study, novel mesoporous FeAl bimetal oxides were successfully synthesized, characterized, and employed for As(III) removal. Batch experiments were conducted to investigate the effects of Fe/Al molar ratio, dosage, and initial solution pH values on As(III) removal. The results showed that the FeAl bimetal oxide with Fe/Al molar ratio 4:1 (shorten as FeAl-4) can quickly remove As(III) from aqueous solution in a wide pH range. The FeAl-4 before and after reaction with As(III) was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM) and selected area electron diffraction (SAED), Brunauer-Emmett-Teller (BET) surface area measurement, and X-ray photoelectron spectroscopy (XPS). The BET results showed that the original FeAl-4 with a high surface area of 223.9 m2/g was a mesoporous material. XPS analysis indicated that the surface of FeAl-4 possessed a high concentration of M-OH (where M represents Fe and Al), which was beneficial to the immobility of As(III). The excellent performance of FeAl-4 makes it a potentially attractive material for As(III) removal from aqueous solution.
authors.affiliation: School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Zecong
authors.initials: Z
authors.lastname: Ding
authors.affiliation: School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China. Electronic address: fufenglian2006@163.com.
authors.forename: Fenglian
authors.initials: F
authors.lastname: Fu
authors.affiliation: School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Zihang
authors.initials: Z
authors.lastname: Cheng
authors.affiliation: School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Jianwei
authors.initials: J
authors.lastname: Lu
authors.affiliation: School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
authors.forename: Bing
authors.initials: B
authors.lastname: Tang
mesh_terms: D000327:Adsorption; D000535:Aluminum / Q000737:chemistry*; D001151:Arsenic / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D010087:Oxides / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D018508:Water Purification / Q000379:methods*; D014961:X-Ray Diffraction
chemical_list: D010087:Oxides; D000535:Aluminum; D007501:Iron; D001151:Arsenic
keywords: Adsorption; As(III); FeAl bimetal oxides; Removal mechanism