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Chromates Removal Using Hydrotalcite-Like Compounds of Mg/Al = 2 And 7: Effect of Textural, Thermal and Structural Properties

Published online by Cambridge University Press:  01 February 2011

E. Ramos ,
N. L. Gutiérrez ,
C. A. Contreras  and
M. T. Olguín
E. Ramos
Affiliation:
Departamento de Química de la División de Ciencias Naturales y Exactas, Campus Guanajuato de la Universidad de Guanajuato, Noria Alta s/n, Col. Noria Alta, C.P: 36050, Guanajuato, Guanajuato., México. [email protected]
N. L. Gutiérrez
Affiliation:
Departamento de Química de la División de Ciencias Naturales y Exactas, Campus Guanajuato de la Universidad de Guanajuato, Noria Alta s/n, Col. Noria Alta, C.P: 36050, Guanajuato, Guanajuato., México. [email protected]
C. A. Contreras
Affiliation:
Departamento de Química de la División de Ciencias Naturales y Exactas, Campus Guanajuato de la Universidad de Guanajuato, Noria Alta s/n, Col. Noria Alta, C.P: 36050, Guanajuato, Guanajuato., México. [email protected]
M. T. Olguín
Affiliation:
Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca s/n, km 36.5, La Marquesa, Coyoacán México, C.P: 52750, México
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Abstract

Hydrotalcite-like compounds (HLC's) are a type of ionic lamellar solids with divalent and trivalent metal cations, and exchangeable inorganic and organic anions in the interlamellar space. Interest in HLC arises from the wide applications, where thermal, structural and textural properties and as well as sorption capacity are the properties interested in. HLC are used to removal dangerous metallic anionic, such as Chromium (VI). In this study, Mg/Al - HLC's were synthesized by sol-gel method. Effect of Mg/Al was probed to show the effect on their structure, morphology, physical properties and sorption capacity. The materials were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, textural analysis and thermal analysis. Sorption profiles were investigated using batch method at initial concentration different to was determinate model and kinetic sorption capacity such as maximum removal capacity to equilibrium. Was find values of 428 and 127 mg chromates/g HLC's to Mg/Al = 2 and 7 respectively, equivalent to 125 and 57 mg of chromium /g HLC's in la little time of one minute.

Keywords

absorptionion-exchange materialporositysol-geltexturewaste management
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1275: Structural and Chemical Characterization of Metals, Alloys and Compounds , 2010 , S3-58
Copyright
Copyright © Materials Research Society 2010

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