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|Type:||Artigo de periódico|
|Title:||Non-polluting Wood And Pulp Delignification: Biomimetic Ligninase System|
|Author:||de Magalhaes Erismann N.|
|Abstract:||We report the delignification of Pinusradiata D Don, Eucalyptusglobulus and Eucalyptusgrandis woods (formic acid treated and untreated) by 2 h treatment with a hemin/hydrogen peroxide system. The untreated chips and sawdust of E.globulus were 30% and 50% delignified respectively. No significant effects were found for P.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 of E.grandis untreated wood the delignification was better in sawdust than in chips, but in smaller percentage than in the other Eucalyptus species. This relation is maintained in substrates, treated with formic acid or untreated. The delignification of chips in both species of Eucalyptus was improved when they were pre-treated with formic acid. The loss of lignin in the E.grandis and E.globulus sawdust (pre-treated with formic acid) was 79% and 75% respectively. © 1990 Kluwer Academic Publishers.|
|Editor:||Kluwer Academic Publishers|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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