Charge aspects of hydrogen peroxide bleached de-inked pulps

  • Bhardwaj N
  • Nguyen K
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Abstract

The aim of this study was to evaluate the effect of hydrogen peroxide bleaching on fibre charge of a commercial de-inked recycled pulp. The pulp was bleached with hydrogen peroxide for brightness improvement. The results indicated that the brightness gain was a function of H2O2dosage. The yield loss associated with the peroxide bleaching was significant due to the presence of alkali-soluble components in the de-inked recycled pulp. The loss of the total fibre charge was apparently linearly related to the yield loss, but the change of the fibre surface charge was insignificant. © 2005 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Carboxyl groups
  • De-inked pulp
  • Hydrogen peroxide bleaching
  • Pulp charge

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Authors

  • Nishi K. Bhardwaj

  • K. L. Nguyen

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