Publicação
Biosorption of Cr VI supported on mordenite zeolite
| Resumo: | This work reports the usage of a combined zeolite-biosorbent system for the removal and recovery of aqueous CrVI. The biosorption system consisted of a bacterium, Arthrobacter viscosus, supported on two mordenite (MOR) type zeolites with different Si/Al ratio, HMOR (Si/Al = 10) and NaMOR (Si/Al = 6.5). The results show that the biofilm of A. viscosus supported on MOR zeolite is able to recover chromium from dilute solutions. For both biosorption-MOR systems, the maximum removal was obtained for initial concentration of 20 mgCr/L. However, the best results were obtained for HMOR-system with a removal of 52.1 % for the diluted concentration and the best uptake, 3.3 mgCr VI/gzeolite, was achieved for the initial concentration of 100 mgCr/L. The Langmuir isotherm model was applied with good fitting to the experimental data. |
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| Autores principais: | Figueiredo, Hugo |
| Outros Autores: | Silva, Bruna Andreia Nogueira Airosa; Quintelas, C.; Neves, Isabel C.; Tavares, M. T. |
| Assunto: | Zeolite Chromium Biosorption Mordenite |
| Ano: | 2008 |
| País: | Portugal |
| Tipo de documento: | comunicação em conferência |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | This work reports the usage of a combined zeolite-biosorbent system for the removal and recovery of aqueous CrVI. The biosorption system consisted of a bacterium, Arthrobacter viscosus, supported on two mordenite (MOR) type zeolites with different Si/Al ratio, HMOR (Si/Al = 10) and NaMOR (Si/Al = 6.5). The results show that the biofilm of A. viscosus supported on MOR zeolite is able to recover chromium from dilute solutions. For both biosorption-MOR systems, the maximum removal was obtained for initial concentration of 20 mgCr/L. However, the best results were obtained for HMOR-system with a removal of 52.1 % for the diluted concentration and the best uptake, 3.3 mgCr VI/gzeolite, was achieved for the initial concentration of 100 mgCr/L. The Langmuir isotherm model was applied with good fitting to the experimental data. |
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