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Surface Charge and Adsorption Characteristics for Fluoride of Hexadecyltrimethylammonium Modified Vermiculite

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Abstract:

HDTMA-modified vermiculite (HDTMA-Ver) was formed in a suspension by the interactions between vermiculite and hexadecyltrimethylammonium bromide (HDTMA). For vermiculite and HDTMA-Ver, the pH of the point of zero charge (pHpzc) is 3.16 and 5.09, the surface charge at pH 4.5 is-0.167 and 0.083 mmol/g, and the Langmuir adsorption capacity (qmax) is 4.98 and 8.67 mg/g, respectively. The adsorption data for fluoride by vermiculite and HDTMA-Ver could be fitted by Langmuir model. The as-prepared HDTMA-Ver exhibited excellent ability to remove fluoride ions from aqueous solutions.

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Periodical:

Advanced Materials Research (Volumes 781-784)

Pages:

2265-2268

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.781-784.2265

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Online since:

September 2013

Authors:

Shi Yong Wei, Xu Hong Deng

Keywords:

Adsorption, Fluoride, Hexadecyltrimethylammonium, Surface Charge, Vermiculite

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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