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Separation Science and Technology Volume 47, 2012 - Issue 5
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Influence of the pH on Distribution of Denim Blue in Water Fe-Zeolitic Tuff System

E. Gutiérrez-Segura Departamento de Química, Instituto Nacional de Investigaciones Nucleares, Ocoyoacac Estado de México, México; Facultad de Química, Universidad Autónoma del Estado de México, Toluca Estado de México, México
,
M. Solache-Ríos Departamento de Química, Instituto Nacional de Investigaciones Nucleares, Ocoyoacac Estado de México, MéxicoCorrespondence[email protected]
,
C. Fall Centro Interamericano de Recursos del Agua, CIRA, Unidad San Cayetano, Estado de México, México
&
A. Colín-Cruz Facultad de Química, Universidad Autónoma del Estado de México, Toluca Estado de México, México
Pages 723-728 | Received 10 May 2011, Accepted 01 Sep 2011, Published online: 06 Apr 2012
 
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Abstract

In the present study, the processes of adsorption of denim blue by Fe-zeolitic tuff from aqueous solutions at different pH values were determined. The parameters, Kd(n), Kd(i), Φn, pKa were accurately predicted by applying the linear model to sorption isotherms at different pH values of denim blue. Maximum removal of denim blue was observed at pH values between 3 and 5, where neutral species are the main components of the solution. The results indicate that pH has a pronounced effect on denim blue sorption depending on the conditions of the system.

ACKNOWLEDGEMENTS

We acknowledge financial support from CONACYT, project 131174Q and scholarship Grant No. 170350 for EGS.

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