Non-polluting wood and pulp delignification: Biomimetic ligninase system
| Autor: | Jaime Baeza, Juanita Freer, Nelson Durán, Norma de Magalhães Erismann, Hector Mansilla, Ana Maria Fernández |
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| Rok vydání: | 1990 |
| Předmět: |
biology
Formic acid Pulp (paper) Organosolv Bioengineering General Medicine engineering.material biology.organism_classification Pulp and paper industry Applied Microbiology and Biotechnology Peroxide chemistry.chemical_compound chemistry Biochemistry Eucalyptus globulus visual_art mental disorders engineering visual_art.visual_art_medium Lignin Sawdust Hydrogen peroxide Biotechnology |
| Zdroj: | Biotechnology Letters. 12:305-308 |
| ISSN: | 1573-6776 0141-5492 |
| Popis: | We report the delignification ofPinusradiata D Don,Eucalyptusglobulus andEucalyptusgrandis woods (formic acid treated and untreated) by 2 h treatment with a hemin/hydrogen peroxide system. The untreated chips and sawdust ofE.globulus were 30% and 50% delignified respectively. No significant effects were found forP.radiata sawdust;P.radiata treated chips (organosolv pulp) did not show any further delignification upon hemin/peroxide action, 25% delignification was achieved in untreated chips. In the case ofE.grandis untreated wood the delignification was better in sawdust than in chips, but in smaller percentage than in the otherEucalyptus species. This relation is maintained in substrates, treated with formic acid or untreated. The delignification of chips in both species ofEucalyptus was improved when they were pre-treated with formic acid. The loss of lignin in theE.grandis andE.globulus sawdust (pre-treated with formic acid) was 79% and 75% respectively. |
| Databáze: | OpenAIRE |
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