Mg-Al layered double hydroxides (LDHs) adsorbent was synthesized in situ on γ-Al2O3 for the removal of Cr(VI) from aqueous solution. The material was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electronic microscopy and thermogravimetry and differential thermal analysis. Compared to the LDHs powder, the calcined LDHs sorbent prepared in situ on γ-Al2O3 had higher specific surface area and was easy to recover and reuse. The adsorptive capacity for removing Cr(VI) from aqueous solution was resulting from the memory effect of LDHs based on the XRD results. Both the pseudo-second-order kinetic model and the Langmuir model fit the experimental data well. Furthermore, the adsorbent exhibits excellent sorption–regeneration performances.
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January 02 2017
In situ synthesis of layered double hydroxides on γ-Al2O3 and its application in chromium(VI) removal Available to Purchase
Shifeng Li;
1Liaoning Provincial Key Laboratory of Chemical Separation Technology, Shenyang University of Chemical Technology, Shenyang 100142, China
2Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
E-mail: [email protected]
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Fang Qi;
Fang Qi
1Liaoning Provincial Key Laboratory of Chemical Separation Technology, Shenyang University of Chemical Technology, Shenyang 100142, China
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Min Xiao;
Min Xiao
3College of Environment, Shenyang University, Shenyang 110044, China
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Hongtao Fan;
Hongtao Fan
1Liaoning Provincial Key Laboratory of Chemical Separation Technology, Shenyang University of Chemical Technology, Shenyang 100142, China
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Yanming Shen;
Yanming Shen
1Liaoning Provincial Key Laboratory of Chemical Separation Technology, Shenyang University of Chemical Technology, Shenyang 100142, China
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Kaige Du;
Kaige Du
1Liaoning Provincial Key Laboratory of Chemical Separation Technology, Shenyang University of Chemical Technology, Shenyang 100142, China
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Zhigang Zhang;
Zhigang Zhang
1Liaoning Provincial Key Laboratory of Chemical Separation Technology, Shenyang University of Chemical Technology, Shenyang 100142, China
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Wenxiu Li
Wenxiu Li
1Liaoning Provincial Key Laboratory of Chemical Separation Technology, Shenyang University of Chemical Technology, Shenyang 100142, China
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Water Sci Technol (2017) 75 (6): 1466–1473.
Article history
Received:
April 01 2016
Accepted:
December 20 2016
Citation
Shifeng Li, Fang Qi, Min Xiao, Hongtao Fan, Yanming Shen, Kaige Du, Zhigang Zhang, Wenxiu Li; In situ synthesis of layered double hydroxides on γ-Al2O3 and its application in chromium(VI) removal. Water Sci Technol 23 March 2017; 75 (6): 1466–1473. doi: https://doi.org/10.2166/wst.2017.012
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