Glucuronoxylan-derived chlorinated compounds in filtrates from chlorine dioxide bleaching: a comparative study between eucalypt (E-globulus) and birch (Betula spp.) kraft pulps

abstract

Eucalyptus globulus and Betula spp kraft pulps were submitted to a D0E1D1E2D2 bleaching stage and the ethyl acetate extracts of D filtrates analysed by GC-MS. In both species, significant amounts of glucuronoxylan-derived chlorinated compounds were detected, particularly in D-0 and D-1 stages, contributing 17 to 34% of the corresponding AOX. The influence of the nature of the glucuronoxylan of these two species in the amount of chlorinated derivatives formed is discussed.

keywords

AOX

subject category

Materials Science

authors

Freire, CSR; Silvestre, AJD; Neto, CP; Cavaleiro, JAS

our authors

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