Peanut-Like Hematite Prepared by a New Facile Hydrothermal Process for Removal of As(V)

Transactions of Tianjin University - Tập 25 - Trang 23-30 - 2018
Chengjin Zhang1, Shaoyi Jia1, Songhai Wu1, Yong Liu2
1School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
2School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, China

Tóm tắt

Peanut-like hematite has been prepared by a new facile hydrothermal method and applied in the adsorption removal of As(V). The structural features of the as-prepared hematite were characterized systematically by X-ray diffraction, X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller, scanning electron microscopy, energy-dispersive X-ray spectroscopy mapping, Fourier transform infrared spectroscopy, and transmission electron microscopy. Results showed that the morphologies of hematite could be tuned to spindle-like, oval-like, and cantaloupe-like shapes by adjusting the hydrothermal conditions. The peanut-like hematite formation followed a five-step route. At pH = 3, the adsorption amount of As(V) over peanut-like hematite reached 13.84 mg/g, and the adsorption kinetic process corresponded to the pseudo-second-order kinetic model. The peanut-like hematite also showed partial selectivity over As(V) in the hydrosphere. This method can be a reference for the preparation of other architectural metal oxide materials.

Tài liệu tham khảo

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