| Revista: | Brazilian journal of chemical engineering |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000309099 |
| ISSN: | 0104-6632 |
| Autors: | Silva, D.L1 Brunner, G2 |
| Institucions: | 1Universidade Federal do Para, Departamento de Engenharia Quimica e de Alimentos, Belem, Para. Brasil 2Technische Universitaet Hamburg-Harburg, Thermische Verfahrenstechnik, Hamburgo. Alemania |
| Any: | 2006 |
| Període: | Jun |
| Volum: | 23 |
| Número: | 2 |
| Paginació: | 213-218 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, analítico |
| Resumen en inglés | Adsorption and regeneration of ion exchange resins were studied using a subcritical solution of a CO2-H2O mixture and a fixed bed column. The commercial Amberlite IRC-50/IRC-86 cation exchange resins and Amberlite IRA-67 anion exchange resin were tested for heavy metals (Pb, Cu, Cd) adsorption from a solution with different initial metal concentrations at different temperatures. After adsorption, the loaded resins were regenerated with water and carbon dioxide at different temperatures and a pressure of 25 MPa. The efficiency of the IRC-50 resin was lower than that of the IRC-86 resin for the adsorption of metals like Cd, Cu and Pb. Results obtained for desorption of these metals indicated that the process could be used for Cd and in principle for Cu. Sorption of metal ions depended strongly on feed concentration. Mathematical modeling of the metal desorption process was carried out successfully as an extraction process. For this purpose, the VTII Model, which is applied to extraction from solids using supercritical solvents, was used in this work |
| Disciplines | Química |
| Paraules clau: | Ingeniería química, Metales pesados, Adsorción, Resinas de intercambio iónico, Dióxido de carbono |
| Keyword: | Chemistry, Chemical engineering, Heavy metals, Adsorption, Ion exchange resins, Carbon dioxide |
| Text complet: | Texto completo (Ver HTML) |
