Arsenate removal by chitosan iron oxyhydroxide beads: Preparation, characterization, and adsorption studies

This study compared arsenic removal from drinking water by two different adsorbents: iron-im-pregnated chitosan beads (Fe-ICB) and iron-doped chitosan beads (Fe-dCB). Scanning electron microscopy, X-ray diffraction (XRD), Fourier transform infrared, and Raman spectroscopy were applied to characteriz...

Full description

Main Authors: González Rodríguez, José Ricardo, Rojas Carrillo, Oscar, Romero-Esquivel, Luis G.
Format: Artículo
Language: Inglés
Published: Desalination Publications 2021
Subjects:
Online Access: http://hdl.handle.net/11056/22277
id RepoUNACR22277
recordtype dspace
spelling RepoUNACR222772021-12-06T13:56:10Z Arsenate removal by chitosan iron oxyhydroxide beads: Preparation, characterization, and adsorption studies González Rodríguez, José Ricardo Rojas Carrillo, Oscar Romero-Esquivel, Luis G. ADSORPTION ARSENIC REMOVAL CHITOSAN FERRIHYDRITE IRON CHITOSAN BEADS ARSÉNICO This study compared arsenic removal from drinking water by two different adsorbents: iron-im-pregnated chitosan beads (Fe-ICB) and iron-doped chitosan beads (Fe-dCB). Scanning electron microscopy, X-ray diffraction (XRD), Fourier transform infrared, and Raman spectroscopy were applied to characterize the materials produced. The As(V) adsorption capacity of both types of materials was evaluated by batch tests, followed by a column test using the most promising material. The XRD and the Raman spectroscopy confirmed the presence of 2-line ferrihydrite in the produced Fe-dCB, and no specific iron oxy-hydroxide was identified in the Fe-ICB. Both types of materials followed either the Langmuir or the Freundlich isotherm adsorption models. The Fe-dCB were more efficient in removing As(V) than the Fe-ICB. The actual maximum capacity of the produced Fe-dCB ranged from 0.27 to 0.61 mg/g under the conditions tested (concentration: 1 mg/L; pH: 7.0; 100 rpm). The Fe-dCB with the better adsorption capacity at low concentrations (<0.1 mg/L) were used in a column test using an As(V) influent concentration of 0.060 mg/L. The Fe-dCB produced close to 91,000 BVs, meeting the standard for drinking water (0.01 mg/L). Therefore, the material exhibits promising adsorbent properties for filtration applications with low arsenic concentrations. Este estudio comparó la eliminación de arsénico del agua potable mediante dos adsorbentes diferentes: perlas de quitosano impregnadas de hierro (Fe-ICB) y perlas de quitosano dopadas con hierro (Fe-dCB). Se aplicaron microscopía electrónica de barrido, difracción de rayos X (XRD), infrarrojos por transformada de Fourier y espectroscopía Raman para caracterizar los materiales producidos. La capacidad de adsorción de As (V) de ambos tipos de materiales se evaluó mediante pruebas por lotes, seguidas de una prueba en columna utilizando el material más prometedor. La XRD y la espectroscopía Raman confirmaron la presencia de ferrihidrita de 2 líneas en el Fe-dCB producido, y no se identificó ningún oxihidróxido de hierro específico en el Fe-ICB. Ambos tipos de materiales siguieron los modelos de adsorción de isotermas de Langmuir o Freundlich. El Fe-dCB fue más eficiente en la eliminación de As (V) que el Fe-ICB. La capacidad máxima real del Fe-dCB producido osciló entre 0,27 y 0,61 mg / g en las condiciones probadas (concentración: 1 mg / L; pH: 7,0; 100 rpm). El Fe-dCB con la mejor capacidad de adsorción a bajas concentraciones (<0.1 mg / L) se utilizó en una prueba de columna usando una concentración de afluente de As (V) de 0.060 mg / L. El Fe-dCB produjo cerca de 91,000 BV, cumpliendo con el estándar para agua potable (0.01 mg / L). Por lo tanto, el material exhibe propiedades adsorbentes prometedoras para aplicaciones de filtración con bajas concentraciones de arsénico. Universidad Nacional, Costa Rica Instituto Tecnológico de Costa Rica, Costa Rica. Escuela de Química 2021-12-06T13:56:08Z 2021-12-06T13:56:08Z 2021 http://purl.org/coar/resource_type/c_6501 19443994 http://hdl.handle.net/11056/22277 10.5004 / dwt.2021.26913 eng Acceso embargado application/pdf Desalination Publications Desalination and Water Treatment vol.220 142-151 2021
institution Universidad Nacional de Costa Rica
collection Repositorio UNA-Costa Rica
language Inglés
topic ADSORPTION
ARSENIC REMOVAL
CHITOSAN
FERRIHYDRITE
IRON CHITOSAN BEADS
ARSÉNICO
spellingShingle ADSORPTION
ARSENIC REMOVAL
CHITOSAN
FERRIHYDRITE
IRON CHITOSAN BEADS
ARSÉNICO
González Rodríguez, José Ricardo
Rojas Carrillo, Oscar
Romero-Esquivel, Luis G.
Arsenate removal by chitosan iron oxyhydroxide beads: Preparation, characterization, and adsorption studies
description This study compared arsenic removal from drinking water by two different adsorbents: iron-im-pregnated chitosan beads (Fe-ICB) and iron-doped chitosan beads (Fe-dCB). Scanning electron microscopy, X-ray diffraction (XRD), Fourier transform infrared, and Raman spectroscopy were applied to characterize the materials produced. The As(V) adsorption capacity of both types of materials was evaluated by batch tests, followed by a column test using the most promising material. The XRD and the Raman spectroscopy confirmed the presence of 2-line ferrihydrite in the produced Fe-dCB, and no specific iron oxy-hydroxide was identified in the Fe-ICB. Both types of materials followed either the Langmuir or the Freundlich isotherm adsorption models. The Fe-dCB were more efficient in removing As(V) than the Fe-ICB. The actual maximum capacity of the produced Fe-dCB ranged from 0.27 to 0.61 mg/g under the conditions tested (concentration: 1 mg/L; pH: 7.0; 100 rpm). The Fe-dCB with the better adsorption capacity at low concentrations (<0.1 mg/L) were used in a column test using an As(V) influent concentration of 0.060 mg/L. The Fe-dCB produced close to 91,000 BVs, meeting the standard for drinking water (0.01 mg/L). Therefore, the material exhibits promising adsorbent properties for filtration applications with low arsenic concentrations.
format Artículo
author González Rodríguez, José Ricardo
Rojas Carrillo, Oscar
Romero-Esquivel, Luis G.
author_sort González Rodríguez, José Ricardo
title Arsenate removal by chitosan iron oxyhydroxide beads: Preparation, characterization, and adsorption studies
title_short Arsenate removal by chitosan iron oxyhydroxide beads: Preparation, characterization, and adsorption studies
title_full Arsenate removal by chitosan iron oxyhydroxide beads: Preparation, characterization, and adsorption studies
title_fullStr Arsenate removal by chitosan iron oxyhydroxide beads: Preparation, characterization, and adsorption studies
title_full_unstemmed Arsenate removal by chitosan iron oxyhydroxide beads: Preparation, characterization, and adsorption studies
title_sort arsenate removal by chitosan iron oxyhydroxide beads: preparation, characterization, and adsorption studies
publisher Desalination Publications
publishDate 2021
url http://hdl.handle.net/11056/22277
_version_ 1755287259787034624
score 11.772204