Activity of laccase on unbleached and bleached thermomechanical pulp

Stina Grönqvist (Corresponding Author), Johanna Buchert, K. Rantanen, Liisa Viikari, Anna Suurnäkki

Research output: Contribution to journalArticleScientificpeer-review

49 Citations (Scopus)


The introduction of value-added properties to pulp fibres is an attractive proposition. One interesting option is targeted modification of fibre surfaces by enzymatic activation. In this work, the activity of laccase on pulp and pulp fractions from thermomechanical pulp (TMP) and peroxide bleached TMP was studied on the basis of consumption of the co-substrate oxygen in the reaction and by studying the formation of radicals in the pulp material as analysed by electron paramagnetic resonance spectroscopy (EPR). Laccases obtained from Trametes hirsuta and Myceliophthora thermophila were used in the study. Laccases were found to be active on pulp material of unbleached TMP, whereas only fines from bleached TMP reacted in laccase treatment. Dissolved and colloidal substances (DCS) were assumed to have a mediating role in the laccase-catalysed oxidation of the fibre-bound material.
Original languageEnglish
Pages (from-to)439-445
Number of pages7
JournalEnzyme and Microbial Technology
Issue number3-4
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed


  • Activation of fibres
  • Activity of laccase on pulp
  • Laccase

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