Celulosa (Mangifera indica) modificada por melamina-sílice aplicada en el tratamiento de efluentes con precipitación asistida químicamente
DOI:
https://doi.org/10.33448/rsd-v10i6.15331Palabras clave:
Mangifera indica; Celulosa; CEPT; Azul de metileno; Adsorción.Resumen
Este trabajo tuvo como objetivo desarrollar un composite a base de celulosa, melamina y sílice. La celulosa se obtuvo de los residuos de poda de Mangifera indica para el tratamiento primario asistido químicamente de efluentes de la industria textil. El compuesto se caracterizó por FT-IR, MEV, MET, TG-DTG y Zeta Potential. Se aplicó la planificación central del compuesto para optimizar la masa del compuesto y el tiempo de contacto para eliminar el azul de metileno. FT-IR mostró que el composite presentaba la banda de melamina a 815 cm-1. SEM y MET revelaron que en la superficie compuesta hay nitrógeno de melamina, silicio y sodio del catalizador. TG-DTG demostró que el material compuesto es térmicamente más estable que la celulosa, con un 65% de degradación. Debido al potencial zeta, los valores de pH superiores a 5 proporcionan una mayor estabilización y aumentan el carácter aniónico del material compuesto. Se eligió como la mejor condición para la aplicación de 60 mg de composite y 30 minutos de tiempo de contacto, con remoción del 88,6 ± 3,5% del azul de metileno. El estudio de pH reveló que por encima de 5, el compuesto es más eficiente. El proceso de adsorción del tinte por el material fue consistente con el modelo de Langmuir (R2 = 0.9921). Así, el compuesto de celulosa-melamina-sílice desarrollado fue eficaz para eliminar el colorante azul de metileno, presentándose como un material de bajo costo, biodegradable y eficiente, con potencial de aplicación en el tratamiento de efluentes de la industria textil.
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Derechos de autor 2021 Jarbas Soares de Mesquita Júnior; Francisco Cardoso Figueiredo; Evânia Carvalho dos Santos; Darlisson Slag Neri Silva; José Ribeiro dos Santos Júnior
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