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Adsorption Characteristics for Fluoride of Two Hydroxy-Aluminum Pillared Montmorillonites

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Abstract:

Two hydroxy-aluminum pillared montmorillonites (Al-Mt-20 and Al-Mt-80) were prepared at 20°C and 80°C, respectively. The adsorption characteristics for fluoride by Al-Mt-20 and Al-Mt-80 were investigated. Results showed that the d (001) spacing of montmorillonite in Al-Mt-20 and Al-Mt-80 was 1.392 and 1.481 nm, respectively. The optimum pH value for fluoride adsorption was about 4-5. At pH 4.8, the Langmuir adsorption capacity (qmax) for fluoride of Al-Mont-20 and Al-Mont-80 was 7.12 mg/g and 9.78 mg/g, respectively. The adsorption data for fluoride by Al-Mont-20 and Al-Mont-80 could be fitted by Langmuir model (R2 =0.982-0.987), indicating that Langmuir model is suitable to fit the fluoride adsorption of Al-Mont-20 and Al-Mont-80.

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Periodical:

Advanced Materials Research (Volumes 781-784)

Pages:

2261-2264

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.781-784.2261

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Online since:

September 2013

Authors:

Shi Yong Wei, Xu Hong Deng

Keywords:

Adsorption, Fluoride, Hydroxy-Aluminum, Montmorillonite

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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