Adsorption Removal of Fluoride from Aqueous Solution by Hydroxy-Iron Pillared Montmorillonite

Shi Yong Wei; Xu Hong Deng

doi:10.4028/www.scientific.net/AMR.781-784.2273

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 781-784Adsorption Removal of Fluoride from Aqueous...

Adsorption Removal of Fluoride from Aqueous Solution by Hydroxy-Iron Pillared Montmorillonite

Abstract:

Hydroxy-iron pillared montmorillonite (Fe-Mont) was prepared and characterized, and the fluoride adsorption capacity of Fe-Mont was investigated. Compared to pure montmorillonite (Mont), the interlayer spacing, specific surface area (SSA), surface fractal dimension and isoelectric point (IEP) of Fe-Mont increased. At pH 4.5, the Langmuir adsorption capacity (q_max) for fluoride of Mont and Fe-Mont was 4.23 and 6.92 mg/g, respectively. The adsorption data for fluoride by Fe-Mont could be fitted by Langmuir model (R²=0.986) and also by Freundlich isotherm (R²=0.948), and indicating that the monolayer and multilayer adsorption behaviors are simultaneously involved in the fluoride adsorption processes of Fe-Mont.

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Advanced Materials Research (Volumes 781-784)

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2273-2276

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https://doi.org/10.4028/www.scientific.net/AMR.781-784.2273

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September 2013

Authors:

Shi Yong Wei, Xu Hong Deng

Keywords:

Adsorption, Fluoride, Hydroxy-Iron, Pillared Montmorillonite, Surface Properties

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