Utilización de biosorbentes para la remoción de níquel y plomo en sistemas binarios.

Contenido principal del artículo

Autores

C. Tejada
A. Herrera
E. Ruiz

Resumen

La adsorción de Pb(II) y Ni(II) sobre cáscaras de ñame y bagazo de palma fue sistemáticamente estudiada en sistema individual y binario. Los estudios fueron realizados en sistemas batch, fijando los valores de pH y tamaño de partícula. Todas las mediciones de los metales en solución fueron hechas por absorción atómica. Se encontró que, en sistema individual, el equilibrio de adsorción siguió el modelo de Langmuir y Freundlich para ambos metales, alcanzando para las cáscaras de ñame una capacidad máxima de adsorción de 362,45 para el níquel y 68,14 mg/g para el plomo. En el caso del bagazo de palma, se estimó una capacidad de adsorción de 162,64 mg/g para el níquel y 90,28 mg/g para el plomo. En sistema binario, se observó un efecto antagónico para la acción combinada de los metales, aunque la remoción de plomo se vio significativamente incrementada en las cáscaras de ñame cuando se encontraba en solución acusa con el níquel.

 

Abstract

The competitive adsorption of Pb(II) and Ni(II) onto yam peel and palm bagasse was systematically
investigated in single and binary metalic systems. The studies were carried out in batch systems, by taking the pH and particle size as fixed values. All measures of metals in aqueous solution were carried out by atomic absorption. In single system, it was observed for both metals the adsorption equilibrium following the Langmuir and Freundlich models reached a maximum adsorption capacities of about 362.45 mg/g for nickel and 68.14 mg/g for lead, by using the yam peel. Moreover, a maximum adsorption capacity of about 162.64 mg/g was determined for nickel and 90.28 mg/g, obtained for lead by using palm bagasse. In the binary system, the combined action of the metals was found to be antagonistic, even if, the lead sorption was significantly increased onto yam peel in aqueous nickel solution.

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Detalles del artículo

Referencias

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