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Application of ESR Spectroscopy in Bleaching Studies
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D. Cardona-Barrau
Veröffentlicht/Copyright:
1. Juni 2005
Summary
In this study several pulp components were characterized by ESR spectroscopy. Free radicals present in the pulp lignin gave a well-defined signal, and the residual lignin content during a bleaching sequence could be followed using this technique. Organic radicals on the pulp carbohydrates were also detected and could be related to the formation of chromophore structures in pulp. Further, ESR spectroscopy made it possible to characterize several transition metal ions in pulp. Special attention was paid to metal retention and the impact of a sodium borohydride treatment, and the formation and evolution of complexes between metal ions and pulp components was scrutinized.
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Published Online: 2005-06-01
Published in Print: 2003-02-27
Copyright © 2003 by Walter de Gruyter GmbH & Co. KG
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- Ozone Bleaching of Atmospheric Acetic Acid Hardwood Pulp from Betula platyphylla var. japonica Hara
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- Book Review/Literature Reports/Addendum
Artikel in diesem Heft
- Evidence of the Degradation of Middle Lamella in a Waterlogged Archaeological Wood
- Molecular Identity of Species and Isolates of Internal Pore Fungi Antrodia spp. and Oligoporus placenta
- Performance of Waterborne Cu(II) Octanoate/Ethanolamine Wood Preservatives
- Nanoparticles for the Controlled Release of Fungicides in Wood: Soil Jar Studies Using G.Trabeum and T. Versicolor Wood Decay Fungi
- Wood Essential Oils of Juniperus foeticissima Willd
- Structure Elucidation of Condensed Tannins from Barks by Pyrolysis/ Gas Chromatography
- A Density Functional Theory Study of Coniferyl Alcohol Intermonomeric Cross Linkages in Lignin - Three-Dimensional Structures, Stabilities and the Thermodynamic Control Hypothesis
- Inhomogeneities in the Chemical Structure of Spruce Lignin
- Application of ESR Spectroscopy in Bleaching Studies
- Ozone Bleaching of Atmospheric Acetic Acid Hardwood Pulp from Betula platyphylla var. japonica Hara
- Relationship Between Growth Stress, Mechanical-Physical Properties and Proportion of Fibre with Gelatinous Layer in Chestnut (Castanea Sativa Mill.)
- Cambial Growth of Swietenia macrophylla King Studied under Controlled Conditions by High Resolution Laser Measurements
- Selected Properties of Parallel Strand Lumber Made from Southern Pine and Yellow-Poplar
- Effects of Cell Structure on Water Sorption for Wood
- Moisture Dynamics in Norway Spruce and Scots Pine during Outdoor Exposure in Relation to Different Surface Treatments and Handling Conditions
- Book Review/Literature Reports/Addendum
