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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 178Adsorption Kinetics and Thermodynamics of Methyl...

Adsorption Kinetics and Thermodynamics of Methyl Orange onto Surfactant-Modified Sepiolite

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Abstract:

Organosepiolite has been prepared by exchanging with hexadecyltrimethylammonium bromide (CTAB) as a modifier. The adsorption kinetics and thermodynamics of methyl orange from aqueous solutions onto organosepiolite are studied, then the adsorption principle is discussed. The results of XRD and FTIR show that sepiolite can be well modified by treating with CTAB. The results indicate that the adsorption isotherm for methyl orange accords with the Langumir equation. The adsorption enthalpy and entropy changes are –13.54 kJ/mol and -32.8J/(mol•K), respectively. And the adsorption exhibits spontaneous physical adsorption and exothermic. The adsorption dynamics follows the laws of pseudo-second-order kinetics with the energy of activation is 6.36kJ/ mol.

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Periodical:

Advanced Materials Research (Volume 178)

Pages:

17-23

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.178.17

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Online since:

December 2010

Authors:

Ji Yuan Li, Ya Jing Li, Cai Lou Zhou, Chang Ping Wang, Shan Hui Hong

Keywords:

Adsorption, Kinetic, Methyl Orange (MO), Organosepiolite, Thermodynamic

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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