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Journal of Sol-Gel Science and Technology
Published in: Journal of Sol-Gel Science and Technology 1/2016

01-07-2016 | Original Paper: Nano-structured materials (particles, fibers, colloids, composites, etc.)

Preparation of Mg/Al bimetallic oxides as sorbents: microwave calcination, characterization, and adsorption of Cr(VI)

Authors: Xingwang Liu, Yunlong Wu, Yin Xu, Fei Ge

Published in: Journal of Sol-Gel Science and Technology | Issue 1/2016

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Abstract

In the study, Mg/Al bimetallic oxides as sorbents have been successfully prepared via a novel and facile approach (Microwave Calcination). The characterizations of Mg/Al bimetallic oxides were performed using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, N2 adsorption/desorption, and pHPZC analyses. The results showed that microwave calcination resulted in enhanced crystallinity, pHPZC, and specific surface area of the Mg/Al bimetallic oxides, compared to conventional calcination. Comparison of the performance of Cr(VI) adsorption between Mg/Al bimetallic oxides prepared by conventional (CHTC) and microwave (CHTM) calcination was made and discussed. The results demonstrated that the adsorption experiment data from the CHTC and CHTM were both fitted well to Langmuir–Freundlich isotherm model and pseudo-second-order kinetic model, and the adsorption process was chemisorption and controlled by diffusion. Microwave calcination did not change the adsorption properties for Cr(VI), but the Cr(VI) adsorption capacities of Mg/Al bimetallic oxides obtained by microwave calcination were improved.

Graphical Abstract

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Metadata
Title
Preparation of Mg/Al bimetallic oxides as sorbents: microwave calcination, characterization, and adsorption of Cr(VI)
Authors
Xingwang Liu
Yunlong Wu
Yin Xu
Fei Ge
Publication date
01-07-2016
Publisher
Springer US
Published in
Journal of Sol-Gel Science and Technology / Issue 1/2016
Print ISSN: 0928-0707
Electronic ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-016-4018-z

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