2009
DOI: 10.1590/s0100-40422009000100010
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Abstract: Our previous paper showed fragmentary evidence that pulp brightness reversion may be negatively affected by its organically bound chlorine (OX) content. A thorough investigation on eucalyptus kraft pulp led to the conclusion that OX increases reversion of certain pulps but this trend is not universal. Alkaline bleaching stages decrease reversion regardless of pulp OX content. Pulps bleached with high temperature chlorine dioxide revert less than those bleached with conventional chlorine dioxide in sequences en… Show more

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Cited by 6 publications
(2 citation statements)
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“…These oxidation processes were found to increase linearly with the decreasing pH of paper, and therefore, depend on the carboxylic acid content in paper. A connection between the yellowing of paper and both oxidized moieties (COOH and CO)-the latter even in the form of lactones (Lewin 1997)-has been suspected by several groups and also connected to a loss in molecular weight of the cellulose (Barbosa et al 2013;Eiras et al 2009). Earlier mechanistic studies of cellulose discoloration and chromophore formation (Krainz et al 2010a), by means of model compounds, pointed at different but still undefined roles of carbonyls and carboxyls in those processes.…”
Section: Introductionmentioning
confidence: 99%
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“…These oxidation processes were found to increase linearly with the decreasing pH of paper, and therefore, depend on the carboxylic acid content in paper. A connection between the yellowing of paper and both oxidized moieties (COOH and CO)-the latter even in the form of lactones (Lewin 1997)-has been suspected by several groups and also connected to a loss in molecular weight of the cellulose (Barbosa et al 2013;Eiras et al 2009). Earlier mechanistic studies of cellulose discoloration and chromophore formation (Krainz et al 2010a), by means of model compounds, pointed at different but still undefined roles of carbonyls and carboxyls in those processes.…”
Section: Introductionmentioning
confidence: 99%
“…It should be noted that the following discussion only refers to pure celluloses. Evidently, other contributors, such as residues from bleaching chemicals (Eiras et al 2009), hexeneuronic acid (HexA) and similar compounds (Sevastyanova et al 2006;Vuorinen et al 1999), lignin residues (Jääskeläinen et al 2009), or the hemicellulose content can be important factors causing significant color generation in pulp used for real-world applications. Hemicellulose, for instance, has been linked to discoloration in the work of Zhou et al (2011), where they showed a linear correlation between its content and increasing color after processing.…”
Section: Introductionmentioning
confidence: 99%