- Laccase-mediator biobleaching applied to a direct yellow dyed paper.
Laccase-mediator biobleaching applied to a direct yellow dyed paper.
Biotechnology progress (2004-12-04)
Kristina Knutson, Arthur Ragauskas
PMID15575730
RESUMO
A laccase-mediator system (LMS) for biobleaching was applied to a bleached chemical pulp dyed with stilbene dye Direct Yellow 11. Of mediators tested, 2,2'-azinobis(3-ethylbenzthiazoline-6-sulfonate) (ABTS) was found to be more effective than either violuric acid (VA) or N-hydroxybenzotriazole (HBT), which had been shown to be superior to ABTS when bleaching virgin chemical pulp. The laccase-ABTS system removed more than 60% of the color.
MATERIAIS