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Tecnología en Marcha
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Tecnología en Marcha
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Tecnología en Marcha
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Sintesis de Zeolitas utilizando como materia prima lodos de los procesos de anodizado de aluminio

Zeolites synthesis using as a raw material the aluminium anodizing sludges
Authors: Ramón Martínez-Mañez; Fausto Peñafiel-Villarreal;

Sintesis de Zeolitas utilizando como materia prima lodos de los procesos de anodizado de aluminio

Abstract

Se encontró, por absorción atómica y escaneado electrónico de barrido concentraciones entre 25,3% y 39,45 % de aluminio, además de sodio, magnesio, calcio y silicio en los lodos de anodizado de aluminio de una industria que opera en Ecuador. Por lo tanto el objetivo del presente trabajo fue investigar a nivel de laboratorio, la posibilidad de utilizar estos residuos como fuente de precursores en la síntesis de zeolitas. Utilizando una solución de hidróxido de sodio en concentraciones 0,5M, 1,0 M, 1,5 M, 2,0 M, 2,5 M y 3,0 M en mezcla con Na2SiO3 hidratado, se ajustó la composición química de 20 g de muestra de lodo a una constante de relación molar SiO2/Al2O3 de 1,24 para todas las pruebas y variando las relaciones molares de Na2O/Al2O3; Na2O/SiO2 y H2O/ Na2O, conforme a la variación de la concentración de la solución de hidróxido de sodio. Se mantuvo constante la temperatura de fusión de precursores, envejecimiento y cristalización de la zeolita a 100°C y tiempo de reacción de 48 horas. Mediante la técnica de difracción de rayos X, se identificó la síntesis de la zeolita Na-P1 GIS , con tres tipos de mineralogía, además las zeolitas ACP-1 y Sodalita Octahidrato. Las imágenes electrónicas muestran un producto con una morfología bien definida. Las mejores condiciones del resultado fueron la concentración 1,5 M de la solución de sosa y relaciones molares 1,24 de SiO2/Al2O3; 0,61 de Na2O/Al2O3; 2,02 de SiO2/Na2O; 15,51, de H2O/ Na2O y 7,68 de H2O/ SiO2. A mayores concentraciones de sosa se obtienen las mismas zeolitas, como lo demuestran los difractogramas de rayos X, pero las imágenes electrónicas de los productos muestran cristales deformados, posiblemente por el exceso de sosa.

Country
Spain
Keywords

Technology, Zeolite, Scanning electronic microscopy (SEM), T, Diffractogram, Absorción atómica, QUIMICA INORGANICA, diffractogram, Anodizing sludge, GIS, Zeolite, difractograma., NaP1, GIS, X-ray diffraction (XRD), Zeolita, Difractograma, Lodo de anodizado, Difracción de rayos X (DRX), difracción de rayos X (DRX), Microscopía de escaneado electrónico de barrido (MEB), Atomic absorption, absorción atómica

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selected citations
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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