Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/3691
Título: | Cr (III) recovery from Saccharomyces cerevisiae by elution : a preliminary study |
Autor(es): | Ferraz, A. I. Tavares, M. T. Teixeira, J. A. |
Data: | 27-Ago-2000 |
Citação: | INTERNATIONAL CONGRESS OF CHEMICAL AND PROCESS ENGINEERING, 14, Praga, 2000 - "14th International Congress of Chemical and Process Engineering - CHISA2000". [S.l.: s.n., 2000]. |
Resumo(s): | To recover adsorbed metals from biosorbents, in order to recycle metal and reuse biomass in several adsorption/desorption cycles, elution conditions need to be optimized. The present work aimed to study the following elution parameters: eluant type and concentration (H2SO4, HNO3, HCl, CH3COOH and Na2CO3 0.1, 0.5 and 1.0 M, and EDTA 0.01, 0.05 and 0.1 M); biosorbent contact time with Cr (III) solution (15 min, 2 and 24 h), and S/L ratio (4 and 8 g/L). Experimental data show a decrease in Cr recovery efficiency with increasing sorption time, probably due to metal bioaccumulation. Concerning the S/L ratio, it was possible to observe, in most essays, that best recoveries were achieved using biosorbent concentration of 8 g/L. Comparing the eluants tested according to their metal recovery efficiencies, it can be concluded that Na2CO3 is not a good eluant (maximum recovery of 21 %). All the others showed equivalent behaviours, being necessary more assays to determine eluant treatment effect in Cr uptake capacity in subsequent sorption cycles. |
Tipo: | Artigo em ata de conferência |
URI: | https://hdl.handle.net/1822/3691 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Artigos em Livros de Atas / Papers in Proceedings |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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CHISA2000-1437[1].pdf | 34,52 kB | Adobe PDF | Ver/Abrir |