Paper Title:
Adsorption Kinetics and Thermodynamics of Methyl Orange onto Surfactant-Modified Sepiolite
  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.

  Info
Periodical
Edited by
Jinsheng Liang and Lijuan Wang
Pages
17-23
DOI
10.4028/www.scientific.net/AMR.178.17
Citation
J. Y. Li, Y. J. Li, C. L. Zhou, C. P. Wang, S. H. Hong, "Adsorption Kinetics and Thermodynamics of Methyl Orange onto Surfactant-Modified Sepiolite", Advanced Materials Research, Vol. 178, pp. 17-23, 2011
Online since
December 2010
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$32.00
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