Publicação
Recycling of textile bleaching effluents for dyeing using immobilized catalase
| Resumo: | Catalase was immobilized on alumina carrier and crosslinked with glutaraldehyde. Storing stability, temperature and pH profiles of enzyme activity were studied in a column reactor with recirculation and in a batch stirred-tank reactor. The immobilized enzyme retained 44% of its activity at pH 11, 30 °C and 90% at 80 °C, pH 7. The half-life time of the immobilized catalase was increased to 2 h at pH 12, and 60 °C. Acceptable results were achieved when the residual water from the washing process of H2O2-bleached fabrics was treated with the immobilized enzyme and then reused for dyeing. |
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| Autores principais: | Costa, Silgia |
| Outros Autores: | Tzanov, Tzanko; Carneiro, Ana Filipa Gonçalves da Costa; Gübitz, Georg M.; Paulo, Artur Cavaco |
| Assunto: | catalase immobilization enzyme stabilization H2O2 textile dyeing H O 2 2 |
| Ano: | 2002 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | Catalase was immobilized on alumina carrier and crosslinked with glutaraldehyde. Storing stability, temperature and pH profiles of enzyme activity were studied in a column reactor with recirculation and in a batch stirred-tank reactor. The immobilized enzyme retained 44% of its activity at pH 11, 30 °C and 90% at 80 °C, pH 7. The half-life time of the immobilized catalase was increased to 2 h at pH 12, and 60 °C. Acceptable results were achieved when the residual water from the washing process of H2O2-bleached fabrics was treated with the immobilized enzyme and then reused for dyeing. |
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