In this study, Zn/Al-layered double hydroxides (Zn/Al-LDHs) were synthesized by a co-precipitation method and characterized with X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy. Then the hexavalent chromium Cr(VI) adsorption experiments on calcined Zn/Al-LDHs were carried out to analyze the effects of pH, temperature, adsorption time, initial Cr(VI) concentration and adsorbent dosage on the removal of Cr(VI) from aqueous solutions. The maximum adsorption capacity for Cr(VI) on calcined Zn/Al-LDHs under optimal conditions was found to be over 120 mg/g. The kinetic and isotherm of Cr(VI) adsorption on calcined Zn/Al-LDHs can be described with the pseudo-second-order kinetic model and Langmuir isotherm, respectively.
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Research Article|
April 27 2016
Removal of hexavalent chromium from aqueous solution by calcined Zn/Al-LDHs
Hui-Duo Yang;
Hui-Duo Yang
1School of Chemical Engineering, China University of Mining & Technology, Xuzhou 221116, China
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Yun-Peng Zhao;
1School of Chemical Engineering, China University of Mining & Technology, Xuzhou 221116, China
E-mail: yunpengzhao2009@163.com
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Shi-Feng Li;
Shi-Feng Li
2School of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
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Xing Fan;
Xing Fan
1School of Chemical Engineering, China University of Mining & Technology, Xuzhou 221116, China
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Xian-Yong Wei;
Xian-Yong Wei
1School of Chemical Engineering, China University of Mining & Technology, Xuzhou 221116, China
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Zhi-Min Zong
Zhi-Min Zong
1School of Chemical Engineering, China University of Mining & Technology, Xuzhou 221116, China
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Water Sci Technol (2016) 74 (1): 229–235.
Article history
Received:
October 08 2015
Accepted:
April 15 2016
Citation
Hui-Duo Yang, Yun-Peng Zhao, Shi-Feng Li, Xing Fan, Xian-Yong Wei, Zhi-Min Zong; Removal of hexavalent chromium from aqueous solution by calcined Zn/Al-LDHs. Water Sci Technol 7 July 2016; 74 (1): 229–235. doi: https://doi.org/10.2166/wst.2016.204
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