Caracterización estructural de la cascarilla de arroz modificada como adsorbente alternativo y eficiente para la remoción de Cr (VI) en solución

Gloria María Doria Herrera; Angelina Hormaza Anaguano; Darío Gallego Suarez

doi:10.22490/21456453.976

Vol. 4 No. 1 (2013)

Published 2013-01-15

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Artículos de Investigación

Structural characterization of the husks from modified rice as an alternative absorbant and effective for the removal of Cr (VI) in solution

DOI: https://doi.org/10.22490/21456453.976

Gloria María Doria Herrera Universidad Nacional Abierta y a Distancia

Angelina Hormaza Anaguano Escuela de Química, Facultad de Ciencias. Universidad Nacional de Colombia – Sede Medellín. Medellín, Antioquia, Colombia

Darío Gallego Suarez 3Escuela de procesos. Facultad de Minas. Universidad Nacional de Colombia – Sede Medellín. Medellín, Antioquia, Colombia

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Abstract
References

This article describes the structural characterization of the husk of modified rice through the process of advanced oxidation with the reagent Fenton; the transformation was carried out with the intention of increasing the number of active sites on the material’s surface, and consequently to generate an absorbent with a greater capacity for the removal of Cr (VI) ions in solution, compared to the husk of natural rice. The characterization of modified material was determined through distinct experimental techniques that include the analysis of the functional groups present on the absorbent’s surface through infrared spectroscopy with diffuse reflectance, (DRIFT), likewise, a surface morphology analysis of the husk through a scanning electron microscope (SEM), a compositional analysis and thermogavimetric (TGA). All of these tests were carried out before and after the modification process. The results of the DRIFT point towards a slight shift and attenuation in the vibration frequencies of the functional groups implicated in the structural modification, whereas the SEM analysis indicated noticeable changes in the morphology of the absorbent material. Meanwhile, the compositional analysis showed considerable changes in the percentage of the material components, whose presence was confirmed through the TGA analysis, after decomposing at the expected temperatures. In short, all results confirm the structural modification of the absorbent tested.

keywords: adsorption, composition, infrared, morphology, spectroscopic techniques.

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How to Cite

Doria Herrera, G. M., Hormaza Anaguano, A., & Gallego Suarez, D. (2013). Structural characterization of the husks from modified rice as an alternative absorbant and effective for the removal of Cr (VI) in solution. Revista De Investigación Agraria Y Ambiental, 4(1), 22-29. https://doi.org/10.22490/21456453.976

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