Title
Application of spheroidal agglomerates of γ-Al2O3 in the fluoride removal from aqueous medium
Aplicación de aglomerados esferoidales de γ-Al2O3 en la remoción de fluoruro de medio acuoso
Author
RAFAEL ROMERO TOLEDO
VICTOR RUIZ SANTOYO
ULISES ZURITA LUNA
GUSTAVO RANGEL PORRAS
MERCED MARTINEZ ROSALES
Access level
Open Access
Subjects
BIOLOGÍA Y QUÍMICA - (CTI) Fluoride - ([Acta Universitaria: Multidisciplinary Scientific Journal. Vol. 29 (2019)]) γ-Al2O3 - ([Acta Universitaria: Multidisciplinary Scientific Journal. Vol. 29 (2019)]) Spheroidal agglomerates - ([Acta Universitaria: Multidisciplinary Scientific Journal. Vol. 29 (2019)]) Adsorbent - ([Acta Universitaria: Multidisciplinary Scientific Journal. Vol. 29 (2019)]) Water - ([Acta Universitaria: Multidisciplinary Scientific Journal. Vol. 29 (2019)]) Fluoruro - ([Acta Universitaria: Multidisciplinary Scientific Journal. Vol. 29 (2019)]) γ-Al2O3 - ([Acta Universitaria: Multidisciplinary Scientific Journal. Vol. 29 (2019)]) Aglomerados esferoidales - ([Acta Universitaria: Multidisciplinary Scientific Journal. Vol. 29 (2019)]) Adsorbentes - ([Acta Universitaria: Multidisciplinary Scientific Journal. Vol. 29 (2019)]) Agua - ([Acta Universitaria: Multidisciplinary Scientific Journal. Vol. 29 (2019)])
Summary or description
En el presente estudio se investigó un adsorbente aglomerado esferoidal de γ-Al2O3 obtenido a partir de pseudoboehmita para la eliminación eficaz de fluoruro de un medio acuoso. Las propiedades superficiales se caracterizaron por diversas técnicas: XRD, fisisorción de N2, FE-SEM/EDS, RMN 27Al, adsorción de piridina por FT-IR, PZy tamaño de partícula. Se llevaron a cabo experimentos en lotes y se compararon con una alúmina activada comercial (AA). El proceso se llevó a cabo a pH 5, 7 y 9, a 25 y 35 ºC. Los resultados experimentales indicaron que los aglomerados esferoidales de γ-Al2O3 eliminan hasta 15 mg/g, con una capacidad de adsorción mayor que AA de 13 mg/g, a pH 5, estudiados a 25 y 35 ºC. El proceso de adsorción de F-en γ-Al2O3 y AA siguió la cinética de pseudo-primer orden y la isoterma de Langmuir. Los resultados muestran un adsorbente eficaz para la eliminación de F-.
A spheroidal agglomerate γ-Al2O3 adsorbent obtained from pseudoboehmite for effective removal of fluoride from aqueous medium was investigated in the present study. The surface properties were characterized by several techniques: XRD, physisorption of N2, FE-SEM/EDS, 27Al NMR, FT-IR Pyridine adsorption, PZ and particle size. Batch experiments were conducted and they were compared with a commercial activated alumina (AA). The process was carried out at pH 5, 7, and 9, then at 25 and 35 ºC. Batch experimental results indicated that the spheroidal agglomerates of γ-Al2O3 remove up to 15 mg/g with a higher adsorption capacity than AA of 13 mg/g, at pH 5, studied at 25 and 35 °C. The F−adsorption processes in γ-Al2O3 and AA followed the pseudo-first-order kinetics and the Langmuir isotherm. The results showed an adsorbent effective for removal of F−.
Publisher
Universidad de Guanajuato
Publish date
October 9, 2019
Publication type
Article
Publication version
Published Version
Information Resource
Format
application/pdf
Source
Acta Universitaria: Multidisciplinary Scientific Journal. Vol. 29 (2019)
Language
English
Relation
https://doi.org/10.15174/au.2019.2036
Source repository
Repositorio Institucional de la Universidad de Guanajuato
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