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Acid Red 66 Dye Removal from Aqueous Solution by Fe/C-based Composites: Adsorption, Kinetics and Thermodynamic Studies

The presence of synthetic dyes in water causes serious environmental issues owing to the low water quality, toxicity to environment and human carcinogenic effects. Adsorption has emerged as simple and environmental benign processes for wastewater treatment. This work reports the use of porous Fe-bas...

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Autores principales: Paz, Camila B., Araújo, Rinaldo S., Oton, Lais F., Oliveira, Alcineia C., Soares, João M., Medeiros, Susana N., Rodríguez-Castellón, Enrique, Rodríguez-Aguado, Elena
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7085003/
https://www.ncbi.nlm.nih.gov/pubmed/32131394
http://dx.doi.org/10.3390/ma13051107
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author Paz, Camila B.
Araújo, Rinaldo S.
Oton, Lais F.
Oliveira, Alcineia C.
Soares, João M.
Medeiros, Susana N.
Rodríguez-Castellón, Enrique
Rodríguez-Aguado, Elena
author_facet Paz, Camila B.
Araújo, Rinaldo S.
Oton, Lais F.
Oliveira, Alcineia C.
Soares, João M.
Medeiros, Susana N.
Rodríguez-Castellón, Enrique
Rodríguez-Aguado, Elena
author_sort Paz, Camila B.
collection PubMed
description The presence of synthetic dyes in water causes serious environmental issues owing to the low water quality, toxicity to environment and human carcinogenic effects. Adsorption has emerged as simple and environmental benign processes for wastewater treatment. This work reports the use of porous Fe-based composites as adsorbents for Acid Red 66 dye removal in an aqueous solution. The porous FeC and Fe/FeC solids were prepared by hydrothermal methods using iron sulfates and sucrose as precursors. The physicochemical properties of the solids were evaluated through X-ray diffraction (XRD), Scanning electron microscopy coupled with Energy dispersive spectroscopy (SEM-EDS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared s (FTIR), Raman and Mössbauer spectroscopies, nitrogen adsorption–desorption isotherms, Electron Paramagnetic Resonance (EPR) and magnetic saturation techniques. Results indicated that the Fe species holds magnetic properties and formed well dispersed Fe(3)O(4) nanoparticles on a carbon layer in FeC nanocomposite. Adding iron to the previous solid resulted in the formation of γ-Fe(2)O(3) coating on the FeC type structure as in Fe/FeC composite. The highest dye adsorption capacity was 15.5 mg·g(−1) for FeC nanocomposite at 25 °C with the isotherms fitting well with the Langmuir model. The removal efficiency of 98.4% was obtained with a pristine Fe sample under similar experimental conditions.
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spelling pubmed-70850032020-03-23 Acid Red 66 Dye Removal from Aqueous Solution by Fe/C-based Composites: Adsorption, Kinetics and Thermodynamic Studies Paz, Camila B. Araújo, Rinaldo S. Oton, Lais F. Oliveira, Alcineia C. Soares, João M. Medeiros, Susana N. Rodríguez-Castellón, Enrique Rodríguez-Aguado, Elena Materials (Basel) Article The presence of synthetic dyes in water causes serious environmental issues owing to the low water quality, toxicity to environment and human carcinogenic effects. Adsorption has emerged as simple and environmental benign processes for wastewater treatment. This work reports the use of porous Fe-based composites as adsorbents for Acid Red 66 dye removal in an aqueous solution. The porous FeC and Fe/FeC solids were prepared by hydrothermal methods using iron sulfates and sucrose as precursors. The physicochemical properties of the solids were evaluated through X-ray diffraction (XRD), Scanning electron microscopy coupled with Energy dispersive spectroscopy (SEM-EDS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared s (FTIR), Raman and Mössbauer spectroscopies, nitrogen adsorption–desorption isotherms, Electron Paramagnetic Resonance (EPR) and magnetic saturation techniques. Results indicated that the Fe species holds magnetic properties and formed well dispersed Fe(3)O(4) nanoparticles on a carbon layer in FeC nanocomposite. Adding iron to the previous solid resulted in the formation of γ-Fe(2)O(3) coating on the FeC type structure as in Fe/FeC composite. The highest dye adsorption capacity was 15.5 mg·g(−1) for FeC nanocomposite at 25 °C with the isotherms fitting well with the Langmuir model. The removal efficiency of 98.4% was obtained with a pristine Fe sample under similar experimental conditions. MDPI 2020-03-02 /pmc/articles/PMC7085003/ /pubmed/32131394 http://dx.doi.org/10.3390/ma13051107 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Paz, Camila B.
Araújo, Rinaldo S.
Oton, Lais F.
Oliveira, Alcineia C.
Soares, João M.
Medeiros, Susana N.
Rodríguez-Castellón, Enrique
Rodríguez-Aguado, Elena
Acid Red 66 Dye Removal from Aqueous Solution by Fe/C-based Composites: Adsorption, Kinetics and Thermodynamic Studies
title Acid Red 66 Dye Removal from Aqueous Solution by Fe/C-based Composites: Adsorption, Kinetics and Thermodynamic Studies
title_full Acid Red 66 Dye Removal from Aqueous Solution by Fe/C-based Composites: Adsorption, Kinetics and Thermodynamic Studies
title_fullStr Acid Red 66 Dye Removal from Aqueous Solution by Fe/C-based Composites: Adsorption, Kinetics and Thermodynamic Studies
title_full_unstemmed Acid Red 66 Dye Removal from Aqueous Solution by Fe/C-based Composites: Adsorption, Kinetics and Thermodynamic Studies
title_short Acid Red 66 Dye Removal from Aqueous Solution by Fe/C-based Composites: Adsorption, Kinetics and Thermodynamic Studies
title_sort acid red 66 dye removal from aqueous solution by fe/c-based composites: adsorption, kinetics and thermodynamic studies
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7085003/
https://www.ncbi.nlm.nih.gov/pubmed/32131394
http://dx.doi.org/10.3390/ma13051107
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