Preparation of modified nano-SiO2 by bismuth and iron as a novel remover of methylene blue from water solution



Document title: Preparation of modified nano-SiO2 by bismuth and iron as a novel remover of methylene blue from water solution
Journal: Journal of the Mexican Chemical Society
Database: PERIÓDICA
System number: 000413561
ISSN: 1665-9686
Authors: 1
1
2
3
Institutions: 1Islamic Azad University, Department of Chemical Engineering, Kermanshah. Irán
2Islamic Azad University, Department of Chemical, Kermanshah. Irán
3Shahrekord University, Faculty of Engineering, Shahrekord. Irán
Year:
Season: Jul-Sep
Volumen: 61
Number: 3
Pages: 250-259
Country: México
Language: Inglés
Document type: Artículo
Approach: Experimental, analítico
Spanish abstract Nano-silice modificado con bismuto y hierro se evaluó como adsorbente de azul de metileno (MB) presente en solución acuosa. Los adsorbentes se caracterizaron por SEM, FTIR, XRD y TEM. El pH, tiempo de contacto y concentración inicial de MB fueron algunas variables estudiadas en el proceso de adsorción. Para una adsorción máxima de 20 mg/L MB se encontraron las siguientes condiciones óptimas: 20 minutos de tiempo, pH= 5-6 y 8 gr/L de adsorbente. Los resultados de adsorción se ajustaron al modelo de Freundlich mientras que la cinética de la tinta en el adsorbente se describe mediante un modelo de pseudo segundo orden. P
English abstract Modified nano-silica with Bismuth and Iron adsorbent was synthesized to be used as an effective adsorbent material for methylene blue (MB) removal from water solution. The prepared samples were characterized using SEM, FTIR, XRD and TEM. The effect of experimental parameters such as pH, contact time and initial concentration on adsorption treatment were studied. Results indicated that the optimum conditions for maximum adsorption of 20 mg/L MB were: contact time of 20 minutes, pH= 5-6 and 8 gr/L adsorbent, the remaining MB in solution was 1.75%. Langmuir and Freundlich isotherms were employed to model the experimental results and the Freundlich isotherm was the best-fitting models for the experiment results. The kinetic data were also analyzed through pseudo-first-order and pseudo-second-order models. The pseudo-second-order kinetic model well depicted the kinetics of dyes adsorption on adsorbent
Disciplines: Ingeniería
Keyword: Ingeniería química,
Sílice,
Bismuto,
Hierro,
Azul de metileno,
Adsorción,
Nanopartículas
Keyword: Engineering,
Chemical engineering,
Silica,
Bismuth,
Iron,
Methylene blue,
Adsorption,
Nanoparticles
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