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Article | Open Access

Treatment effect on the adsorption capacity of alumina for removal fluoride

Haixia Wu1,2, Lin Chen1, Guo Gao2, Yan Zhang2, Tingjie Wang1( ), Shouwu Guo2( )
Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
National Key Laboratory of Micro/Nano Fabrication Technology, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China
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Abstract

Acid and base treated alumina particles were studied to assess their capacities for the adsorption of fluoride from aqueous solutions. The surface morphology of untreated alumina was analyzed by SEM and its crystal structure was checked by XRD, and was analyzed by FTIR, SEM and EDS mapping after fluoride adsorption. SEM and EDS were also used to understand the surface change of the alumina after acid and base treatment. Fluoride adsorptions at two different initial fluoride concentrations were investigated. The results show that the fluoride adsorption mainly superficially happened on the alumina particle surface. SEM images show base treatment caused the alumina particle recrystallize, while acid treatment made the alumina particle more amorphous. The adsorption capacity of acid treated alumina was about twice compared with that of alumina, while the capacity of base treated alumina was only about half of that of alumina at the solution pH=7. The high adsorption capacity of acid treated alumina makes it suitable for potential application in fluoride removal from water.

Keywords

adsorptionfluoridehydroxylsurface charge

References

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Nano Biomedicine and Engineering
Volume 2 Issue 4,
December 2010
Pages 231-235
DOI: 10.5101/nbe.v2i4.p231-235

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Cite this article:
Wu H, Chen L, Gao G, et al. Treatment effect on the adsorption capacity of alumina for removal fluoride. Nano Biomedicine and Engineering, 2010, 2(4): 231-235. https://doi.org/10.5101/nbe.v2i4.p231-235

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Received: 15 November 2010
Accepted: 06 December 2010
Published: 15 December 2010
© 2010 H. Wu, et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distrib-ution, and reproduction in any medium, provided the original author and source are credited.