The Fate of14C-Labelled High Molecular Weight Chlorinated Lignin and Chromophoric Material During Microbial Treatment of Bleached Kraft Effluent
- 1 January 1987
- journal article
- research article
- Published by Taylor & Francis in Journal of Wood Chemistry and Technology
- Vol. 7 (1) , 51-64
- https://doi.org/10.1080/02773818708085252
Abstract
Bleached kraft effluent (BKE) is highly coloured due to the presence of high molecular weight, chlorinated, oxidised lignin. The dimethyl formamide-soluble portion of BKE was radiolabelled by methoxylation with 14C-methyl iodide, and the resulting product (C14-BKE) was used to Investigate the mechanism of colour removal by fungi and bacteria. The white-rot fungi Coriolus versicolor and Pleurotus sajor-caju decolorised the solutions, and depolymerised the C14-BKE. Both fungi produced about 16Z 14CO2 from C14-BKE In 20 days. The three bacteria tested, Bacillus cereus and two strains of Pseudomonas aeruginosa, removed colour primarily by adsorption with little depolymerisation or mineralization. The adsorbed C14-BKE could be removed from bacterial cells by washing with 0.1 M NaOH.This publication has 15 references indexed in Scilit:
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