The Adsorption of Fluoride Ion from Aqueous Solution by Activated Alumina |
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| Authors: | Young Ku Hwei-Mei Chiou |
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| Institution: | 1. Department of Chemical Engineering, National Taiwan University of Science and Technology, 107, Taiwan, Taipei, Taiwan R.O.C.
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| Abstract: | The adsorption of fluoride ion in aqueous solution by using alumina was studied in this research. The experimental resultsindicated that the removal efficiency was influenced significantly by solution pH and the optimum operating pH wasfound to be in the range of 5 to 7. For neutral and acidic solutions, the adsorption capacities of fluoride by alumina wasinterfered by the presence of sulfate. The Langmuir and Freundlich isotherms can well describe the equilibrium behaviorsof the adsorption processes. The experimentally determined lowvalues of activation energy indicate nonspecific adsorption isthe predominant mechanism. The surface reaction-limiting batchkinetic model can adequately describe the removal behaviors offluoride ion by alumina adsorption in the batch system. |
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