Treatment effect on the adsorption capacity of alumina for removal fluoride

Haixia Wu; Lin Chen; Guo Gao; Yan Zhang; Tingjie Wang; Shouwu Guo

doi:10.5101/nbe.v2i4.p231-235

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Article | Open Access

Treatment effect on the adsorption capacity of alumina for removal fluoride

Haixia Wu^{¹^,²}, Lin Chen^¹, Guo Gao^², Yan Zhang^², Tingjie Wang^¹(), Shouwu Guo^²()

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

adsorption fluoride hydroxyl surface charge

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Nano Biomedicine and Engineering

Volume 2 Issue 4,
December 2010

Pages 231-235

DOI: 10.5101/nbe.v2i4.p231-235

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