Resumo

VERA-CABEZAS, Luisa Mayra et al. MODELING IN FIXED BED COLUMN FOR THE BIOSORPTION OF Cd²⁺ AND Pb² BY COCOA SHELL. Rev. Int. Contam. Ambient [online]. 2018, vol.34, n.4, pp.611-620. ISSN 0188-4999.  https://doi.org/10.20937/rica.2018.34.04.05.

In this work the results of the biosorption of Pb+2 and Cd+2 with cocoa shell in fixed bed columns are presented. A hydrodynamic study was performed varying diameter and height of the column, as well as diameter and mass of biosorbent, to determine the best hydrodynamic conditions, which resulted in a flow through the column of 2.12 mL/min. Experimental data were adjusted to several models depending on the effluent volume, which describe the rupture curve for single component and two component systems. The removal percentages of Pb+2 and Cd+2 in single component systems are 91 and 90 %, respctively. In bicomponent systems (Pb+2-Cd+2) the removal percentages of lead and cadmium were 88 and 90 %, respectively. The dose-response model in bi and mono-component systems best reproduced the experimental rupture curves throughout the measured range.

Palavras-chave : biosorbent; heavy metals; mathematical modeling; rupture curve.

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