A model to describe the adsorption and reduction of Cr (VI) from an aqueous solution by Agave lechuguilla biomass
The biosorption and reduction of Cr (VI) onto packed columns of Agave lechuguilla were analyzed using anadvection-dispersion with a first order reaction (ADR) model and its analytical solution. Design parameters, such asan axial dispersion coefficient, a retardation factor, a distribution coefficien...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2005 |
| País: | México |
| Institución: | Universidad de Guanajuato |
| Repositorio: | Redalyc-UG |
| OAI Identifier: | oai:redalyc.org:62040306 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=62040306 |
| Access Level: | acceso abierto |
| Palabra clave: | Ingeniería model ADR model reduction adsorption chromium (VI) |
| Sumario: | The biosorption and reduction of Cr (VI) onto packed columns of Agave lechuguilla were analyzed using anadvection-dispersion with a first order reaction (ADR) model and its analytical solution. Design parameters, such asan axial dispersion coefficient, a retardation factor, a distribution coefficient, and a general first-order decay constant,were estimated as functions of inlet metal ion concentration, pH, operation time, flow rate, cross-sectional columnarea, the density and length of the bed. The RMSE values (0.096, 0170 and 0.180) with the corresponding flow ratesof 1, 2, 3 (10-3) dm3 min-1, respectively, indicated that the ADR model applied to the experimental data adequatelyexplains the adsorption and reduction of Cr (VI) by lechuguilla biomass. The experimental results at different pHvalues along with the calculated parameters suggest that the adsorption of Cr (VI) took place in the internal pores andthe reduction reaction occurred in the external surface of the biomass. |
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