Cr(VI) Removal from Aqueous by Adsorption on Amine-Functionalized Mesoporous Silica Prepared from Silica Fume

Xitong Li; Caiyun Han; Wenjie Zhu; Wenhui Ma; Yongming Luo; Yang Zhou; Jie Yu; Kuixian Wei

doi:10.1155/2014/765856

Journal of Chemistry (Jan 2014)

Cr(VI) Removal from Aqueous by Adsorption on Amine-Functionalized Mesoporous Silica Prepared from Silica Fume

Xitong Li,
Caiyun Han,
Wenjie Zhu,
Wenhui Ma,
Yongming Luo,
Yang Zhou,
Jie Yu,
Kuixian Wei

Affiliations

Xitong Li: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Caiyun Han: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Wenjie Zhu: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Wenhui Ma: State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province/The National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, Kunming 650093, China
Yongming Luo: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Yang Zhou: State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province/The National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, Kunming 650093, China
Jie Yu: State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province/The National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, Kunming 650093, China
Kuixian Wei: State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province/The National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, Kunming 650093, China

DOI: https://doi.org/10.1155/2014/765856
Journal volume & issue: Vol. 2014

Abstract

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Amino-functionalized mesoporous silica MCM-41 materials have been prepared to develop efficient adsorbents of Cr(VI) in wastewater, using silica fume as silica source. Functionalization with amino groups has been carried out by using grafting method. The materials have been characterized by means of X-ray diffraction (XRD), nitrogen (N2) adsorption-desorption, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Adsorption potential of the material for Cr(VI) removal from aqueous solution was investigated by varying experimental conditions such as pH, initial metal concentration, and contact time. The equilibrium data were analyzed using the Langmuir and Freundlich isotherm by linear regression analysis, and the results show that the adsorption equilibrium data obeyed the Langmuir model. In addition, the kinetics analysis revealed that the overall adsorption process was successfully fitted with the pseudo-second-order kinetic model.

Published in Journal of Chemistry

ISSN: 2090-9063 (Print); 2090-9071 (Online)
Publisher: Hindawi Limited
Country of publisher: United Kingdom
LCC subjects: Science: Chemistry
Website: https://onlinelibrary.wiley.com/journal/2962

About the journal