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Application of raw and modified Uruguayan clays to phosphate adsorption for water remediation

Published online by Cambridge University Press:  16 October 2018

Pablo González ,
Andrea C. De Los Santos ,
Jorge R. Castiglioni  and
María A. De León
Pablo González
Affiliation:
Grupo de Instrumentación y Automatización en Química Analítica (GIAQA), Área Química Analítica, DEC, Facultad de Química, Universidad de la República, Montevideo, Uruguay.
Andrea C. De Los Santos
Affiliation:
Laboratorio de Fisicoquímica de Superficies, DETEMA, Facultad de Química, Universidad de la República, Montevideo, Uruguay.
Jorge R. Castiglioni
Affiliation:
Laboratorio de Fisicoquímica de Superficies, DETEMA, Facultad de Química, Universidad de la República, Montevideo, Uruguay.
María A. De León*
Affiliation:
Laboratorio de Fisicoquímica de Superficies, DETEMA, Facultad de Química, Universidad de la República, Montevideo, Uruguay.
*
*(Email: adeleon@fq.edu.uy)
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Abstract

A raw clay from Uruguay was modified with aluminium to obtain an aluminium pillared clay (Al-PILC). The solids were characterized by scanning electron microscopy, X-ray diffraction and nitrogen adsorption-desorption isotherms. The Al-PILC retained the typical laminar structure of montmorillonite. The specific surface area and the microporous volume of the Al-PILC, 235 m2 g-1 and 0.096 cm3 g-1, respectively, were much higher than those of the clay. The phosphate adsorption capacity of the Al-PILC was higher than those of the clay. The phosphate adsorption kinetic followed the pseudo-first-order model for both, the clay and the Al-PILC, and the phosphate adsorption isotherm for the Al-PILC fit the Freundlich model.

Keywords

absorptionnanostructureenvironmentintercalationwater
Type
Articles
Information
MRS Advances , Volume 3 , Issue 61: Materials Science Young Researchers of Uruguay , 2018 , pp. 3543 - 3549
Copyright
Copyright © Materials Research Society 2018 

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