Obtainment of chelating agents through the enzymatic oxidation of lignins by phenol oxidase.

Abstract:

:Oxidation of lignin obtained from acetosolv and ethanol/water pulping of sugarcane bagasse was performed by phenol oxidases: tyrosinase (TYR) and laccase (LAC), to increase the number of carbonyl and hydroxyl groups in lignin, and to improve its chelating capacity. The chelating properties of the original and oxidized lignins were compared by monitoring the amount of Cu2+ bound to lignin by gel permeation chromatography. The Acetosolv lignin oxidized with TYR was 16.8% and with LAC 21% higher than that of the original lignin. For ethanol/water lignin oxidized with TYR was 17.2% and with LAC 18% higher than that of the original lignin.

authors

Calabria GM,Gonçalves AR

doi

10.1385/abab:129:1:320

subject

Has Abstract

pub_date

2006-04-01 00:00:00

pages

320-5

eissn

0273-2289

issn

1559-0291

journal_volume

129-132

pub_type

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