Adsorción por lote y en una columna de lecho fijo del colorante B39 sobre carbón activado granular
DOI:
https://doi.org/10.15665/rp.v11i1.28Keywords:
Carbón activado, Colorantes, Isotermas de adsorción, Curvas de ruptura.Abstract
Los colorantes están usualmente presentes en los efluentes acuosos de muchas industrias, como la textil, del cuero, el papel, la imprenta y cosméticos. La efectividad de la adsorción de colorantes presentes en aguas residuales, empleando adsorbentes de bajo costo, ha permitido la extensión de esta técnica de remoción, por encima de otros métodos de tratamiento. Este trabajo investigó la capacidad de adsorción de un carbón activado comercial (CA) en la remoción del colorante reactivo Blue 39 (B39) en disolución acuosa a 25°C. Los datos experimentales del estudio en lote realizado a diferentes pH (6-8) y concentraciones iniciales de B39 (5-200 mg dm-3), se ajustan satisfactoriamente al modelo de isoterma de Freundlich, presentando una capacidad máxima de adsorción en monocapa de 17,7 mg g-1 a pH 8. El estudio dinámico a diferentes alturas del lecho (1, 3 y 5 cm), flujos volumétricos (1 y 5 cm3 min-1) y concentración inicial de 5,5 mg dm-3, muestra que el tiempo de servicio de la columna y la capacidad de remoción mejoran cuando la altura aumenta y el flujo volumétrico disminuye. El modelo del tiempo de servicio de la altura del lecho (BDST) se aplicó a los datos experimentales ajustándose de manera aceptable.
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