Novel mesoporous Fe-Al bimetal oxides for As(III) removal: Performance and mechanism

作者：Ding, Zecong; Fu, Fenglian^*; Cheng, Zihang; Lu, Jianwei; Tang, Bing

来源：Chemosphere, 2017, 169: 297-307.

DOI：10.1016/j.chemosphere.2016.11.057

• As(III)
• Fe-Al bimetal oxides
• Adsorption
• Removal mechanism

In this study, novel mesoporous Fe-Al bimetal oxides were successfully synthesized, characterized, and employed for As(III) removal. Batch experiments were conducted to investigate the effects of Fe/AI molar ratio, dosage, and initial solution pH values on As(III) removal. The results showed that the Fe-Al bimetal oxide with Fe/A1 molar ratio 4:1 (shorten as Fe-Al-4) can quickly remove As(III) from aqueous solution in a wide pH range. The Fe-Al-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 Fe-Al-4 with a high surface area of 223.9 m(2)/g was a mesoporous material. XPS analysis indicated that the surface of Fe-Al-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 Fe-Al-4 makes it a potentially attractive material for As(III) removal from aqueous solution.

• 出版日期2017-2
• 单位广东工业大学