Adsorption, oxidation, and reduction behavior of arsenic in the removal of aqueous As(III) by mesoporous Fe/Al bimetallic particles. (1st June 2016)

• Record Type: Journal Article
• Authors: Cheng, Zihang; Fu, Fenglian; Dionysiou, Dionysios D.; Tang, Bing
• Is Part Of: Water research. Volume 96(2016)
• Page Start: 22
• Page End: 31
• Publication Date: 2016-06-01
• Subjects: As(III) removal -- Fe/Al bimetallic particles -- Adsorption -- Oxidation -- Reduction; Water -- Pollution -- Research -- Periodicals; 363.7394
• DOI: 10.1016/j.watres.2016.03.020
• Languages: English
• ISSNs: 0043-1354

Abstract

Abstract: In this study, mesoporous iron/aluminum (Fe/Al) bimetallic particles were synthesized and employed for the removal of aqueous As(III). Scanning electron microscopy and energy dispersive spectroscopy (SEM-EDS), Brunauer-Emmett-Teller (BET) analysis method, Vibrating-sample magnetometry (VSM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR) were employed to characterize the Fe/Al bimetals before and after reaction with As(III). The physical properties, compositions, and structures of Fe/Al bimetallic particles as well as the As(III) removal mechanism were investigated. The characterization of the bimetallic particles after the reaction has revealed the removal of As(III) is a complex process including surface adsorption and oxidation, and intraparticle reduction. The good As(III) removal capability and stability of the Fe/Al bimetallic particles exhibited its great potential as an effective and environmental friendly agent for As(III) removal from water. Graphical abstract: Highlights: Mesoporous and ferromagnetic Fe/Al bimetallic particles were synthesized. The properties, compositions, and structures of Fe/Al bimetals were studied. Fe/Al bimetals exhibited good As(III) removal capability and stability. Adsorption, oxidation, and reduction behavior and mechanism of arsenic were investigated.