Photo-induced Yellowing of Mg(OH)2-based Peroxide Bleached Deinked Pulp
نویسندگان
چکیده
منابع مشابه
Mg(OH)2-Based Hydrogen Peroxide Bleaching of Deinked Pulp
Sodium hydroxide (NaOH) has been used as an alkali source in conventional hydrogen peroxide bleaching. In the present work, partial and total replacement of NaOH with magnesium hydroxide (Mg(OH)2) as the alkali source for hydrogen peroxide bleaching of deinked pulp was studied. The bleached pulp was studied with respect to brightness, post color (P.C.) number, and mechanical properties (i.e., t...
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Xylanase is commonly applied in pulp and paper industries to ease cost-related and environmental pressures. The effect of xylanase treatment on pulp bleaching is well-established, however, few studies were conducted on the effects of xylanase treatment in pulp yellowing, especially the mechanism of pulp yellowing inhibition by xylanase treatment. In this study, pure xylanase (EC 3.2.1.8) was ap...
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To comply with government’s environmental policies and to satisfy the requests of the consumers, recycling of waste paper is essential for reducing the consumption of virgin fibers in pulp and paper industry. However, the poor optical properties of recycled fibers restrict their use in value-added papers. Enzymes, such as lipase and laccase, represent an interesting alternative. The detachment ...
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Recycled fiber use introduces fines, fillers, microbiological contaminants and stickies contaminants to the papermaking system. Deinking processes are designed to remove or control these contaminants. Important considerations in selecting a deinking processes are the type of wastepaper to be deinked and the desired quality of the deinked pulp. These will determine the extent to which contaminan...
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ژورنال
عنوان ژورنال: BioResources
سال: 2017
ISSN: 1930-2126
DOI: 10.15376/biores.12.3.5236-5248