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https://hdl.handle.net/1822/3506
Título: | Sorption of Cr(III) from aqueous solutions by spent brewery grain |
Autor(es): | Ferraz, A. I. Tavares, M. T. Teixeira, J. A. |
Palavras-chave: | Sorption Spent grain Chromium Isotherms |
Data: | 2005 |
Citação: | INTERNATIONAL CHEMICAL ENGINEERING CONFERENCE : CHEMPOR, 9, Coimbra, 2005 – “CHEMPOR 2005 - 9th International Chemical Engineering Conference, Departamento de Engenharia Química da Universidade de Coimbra”. [S.l. : s. n.], 2005. ISBN 972-8055-13-7. |
Resumo(s): | Two types of spent brewery grains were tested for Cr(III) uptake from aqueous solutions: not treated spent grains (NTSG), obtained by abundant washing of spent grain obtained from a Portuguese brewing industry with distilled water, and treated spent grain (TSG), prepared by treating NTSG with NaOH 0.5 M for four hours followed by washing with distilled water. Both materials were mixed with chromium solutions (50 and 100 mg Cr(III)/L), varying medium pH from 3 to 5. Maximum metal uptake occurred at pH 5. Langmuir isotherm model well describes Cr(III) biosorption by NTSG and TSG. The maximum uptake capacity obtained was 17.84 mg Cr(III)/g NTSG and 13.87 mg Cr(III)/g TSG. Considering that Langmuir constant, b, reflecting the affinity between the sorbent and the sorbate is lower for NTSG (0.0749 L/mg) it is possible to conclude that the alkalis treatment does not improve spent grain uptake capacity for Cr(III). |
Tipo: | Artigo em ata de conferência |
URI: | https://hdl.handle.net/1822/3506 |
ISBN: | 972-8055-13-7 |
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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CHEMPOR-QL064[1].pdf | 46,35 kB | Adobe PDF | Ver/Abrir |