Document Detail

Laccase treatment of recycled blue dyed paper: physical properties and fiber charge.
MedLine Citation:
PMID:  18597131     Owner:  NLM     Status:  MEDLINE    
Recycled blue colored paper was treated with laccase under various combinations of physical and chemical parameters including enzyme concentration, temperature, oxygen, and reaction time. Laccase treatment of recycled dyed pulp increased acid group content, tear index, tensile index, and color removal in a dose-dependent manner. Lengthening the treatment time from 2 to 4 h was beneficial to acid group content (12% increase), dye removal, and tensile index but had a detrimental 8% decrease on the tear index. A higher reaction temperature (65 vs. 45 degrees C) had a beneficial effect on acid group content (+31%), and tensile index (+26%) and a slightly negative effect on tear index (-5%), but significantly reduced the ability of laccase to remove color. Comparison of reactions subjected to different levels of oxygen supplementation showed the greatest beneficial effect for laccase treatment with slow oxygen bubbling. The experimental results indicate that laccase treatment increases fiber carboxylic acid content and tensile strength, in addition to reducing the color of the enzyme treated paper.
Chellandi Mohandass; Kristina Knutson; Arthur J Ragauskas
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2008-07-03
Journal Detail:
Title:  Journal of industrial microbiology & biotechnology     Volume:  35     ISSN:  1367-5435     ISO Abbreviation:  J. Ind. Microbiol. Biotechnol.     Publication Date:  2008 Oct 
Date Detail:
Created Date:  2008-09-11     Completed Date:  2009-01-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9705544     Medline TA:  J Ind Microbiol Biotechnol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1103-8     Citation Subset:  IM    
Biological Oceanography Division, National Institute of Oceanography, Dona-Paula, Goa, India.
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MeSH Terms
Coloring Agents / metabolism*
Conservation of Natural Resources
Fungal Proteins / metabolism*
Industrial Microbiology*
Industrial Waste / analysis*
Laccase / metabolism*
Trametes / enzymology
Reg. No./Substance:
0/Coloring Agents; 0/Fungal Proteins; 0/Industrial Waste; EC

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