微反应法制备γ-Al2O3及其对甲基橙的吸附性能研究

doi:10.19964/j.issn.1006-4990.2023-0176

Abstract

Abstract:

Using aluminum sulfate as aluminum source and ammonium bicarbonate as precipitator，pseudo-boehmite was prepared in a multi-channel impinging-flow microreactor.The pseudo-boehmite was calcined at 600 ℃ for 4 h to obtain γ-Al₂O₃.The γ-Al₂O₃ were characterized by fourier infrared spectroscopy，X-ray diffractometry，thermogravimetric differential thermal analyzer，field emission scanning electron microscopy，transmission electron microscopy，specific surface area and porosity analysis，ultraviolet spectrophotometer and Zeta potential analyzer.The adsorption properties of γ-Al₂O₃ prepared by different methods on methyl orange were studied.The results showed that the adsorption properties of γ-Al₂O₃ prepared by microreaction method was higher than conventional titration method.The adsorption process of methyl orange was consistent with Langmuir monomolecular layer model，and the adsorption kinetics was consistent with quasi-second-order kinetics.The optimum application conditions of γ-Al₂O₃ adsorbent were studied.Under optimal application conditions，the adsorption ratio of γ-Al₂O₃ to methyl orange was 58.8% within 5 min and 89.7% within 10 min and reached the highest 98.9% at adsorbed equilibrium.Cyclic experiments showed that γ-Al₂O₃ had excellent stability and maintained high decolorization ratio of methyl orange（95.6%） after four thermal regeneration cycles.

Key words: microchannel, alumina, adsorbent, methyl orange

CLC Number:

TQ133.1

WANG Mengdi, LUO Jin, WU Wei, ZHOU Jinghui, WANG Jing, SUN Yanmin, YU Haibin. Study on preparation of γ-Al₂O₃ by microreaction and its properties for methyl orange adsorption[J]. Inorganic Chemicals Industry, 2023, 55(9): 66-74.

Figures/Tables 14

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Study on preparation of γ-Al₂O₃ by microreaction and its properties for methyl orange adsorption

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Study on preparation of γ-Al2O3 by microreaction and its properties for methyl orange adsorption