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Laccase treatment of recycled blue dyed paper: Physical properties and fiber charge

DRS at CSIR-National Institute of Oceanography

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Title Laccase treatment of recycled blue dyed paper: Physical properties and fiber charge
 
Creator Mohandass, C.
Knutson, K.
Ragauskas, A.J.
 
Subject organic acids
dyes
fiber charge
 
Description 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.
 
Date 2008-10-17T15:29:15Z
2008-10-17T15:29:15Z
2008
 
Type Journal Article
 
Identifier The Journal of Industrial Microbiology and Biotechnology, Vol.35; 1103-1108p.
http://drs.nio.org/drs/handle/2264/1469
 
Language en
 
Rights Copyright [2008]. All efforts have been made to respect the copyright to the best of our
knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Society for Industrial Microbiology