European Journal of Chemistry

Composition and properties of tectosilicate-uranium layers of soil

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Published: Mar 31, 2012
DOI: https://doi.org/10.5155/eurjchem.3.1.32-36.525
Keywords:
Albite, Anorthite, Orthoclase, Surface area, Acidity constants, Potentiometric titrations
Section
Research Article
Issue
Vol. 3 No. 1 (2012): March 2012
Dates
Received 2011-09-07
Accepted 2011-10-13
Published 2012-03-31


Main Article Content

Cecilio Duarte Alaniz
Facultad de Ciencias, Universidad Autónoma del Estado de México, Unidad Académica del Cerrillo, Piedras Blancas El Cerrillo, Tlachaloya Estado de México, CP 50000, México
Eduardo Ordonez Regil
Departamento de Química, Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, La Marquesa, Ocoyoacac, Estado de México, CP 52750, México
Guillermo Jesus Cruz Cruz
Departamento de Física, Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, La Marquesa, Ocoyoacac, Estado de México, CP 52750, México
Jesus Ramirez Torres
Acelerador Tandem, Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, La Marquesa, Ocoyoacac, Estado de México, CP 52750, México
Jose Lopez Monroy
Acelerador Tandem, Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, La Marquesa, Ocoyoacac, Estado de México, CP 52750, México

Abstract

Structure and superficial properties of tectosilicates found in soils with potential to retain uranium are studied in this work. These tectosilicates are largely available as natural minerals in the soil and are composed mainly by anorthite (CaAl2Si2O8), albite (NaAlSi3O8) and orthoclase (KAlSi3O8), in which albite has approximately 3 times the content of orthoclase and 2.5 times the content of anorthite. However, anorthite has a double cell structure, which could result in approximately the same sorption effect as albite. The acidity constants calculated with the surface complexation model suggested that the three components have similar amphoteric behavior in presence of high ionic strength ground salt solutions. The composite mineral has a specific surface area of 20.5 m2g-1 with site density of 2.8 sites nm-2. These characteristics make this mineral a good candidate for uranium capture.

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Alaniz, C. D.; Regil, E. O.; Cruz, G. J. C.; Torres, J. R.; Monroy, J. L. Composition and Properties of Tectosilicate-Uranium Layers of Soil. Eur. J. Chem. 2012, 3, 32-36.

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