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Degradation of bisphenol A by different fungal laccases and identification of its degradation products

Author:
Daâssi, Dalel, Prieto, Alicia, Zouari-Mechichi, Héla, Martínez, María Jesús, Nasri, Moncef, Mechichi, Tahar
Source:
International biodeterioration & biodegradation 2016 v.110 pp. 181-188
ISSN:
0964-8305
Subject:
3-hydroxybutyric acid, biocatalysts, biodegradation, biotransformation, bisphenol A, fungi, gas chromatography-mass spectrometry, laccase, quantitative analysis, tartaric acid
Abstract:
Different fungal laccases were used as biocatalysts for the biotransformation of bisphenol A (BPA). The quantitative analysis by gas chromatography-mass spectrometry (GC–MS) showed that BPA is more rapidly oxidized by Coriolopsis gallica laccase among the different fungal laccases tested. Carboxylic acid derivatives such as tartaric acid was found as BPA degradation products resulting from reactions catalyzed by 1 U ml⁻¹ of laccase from C. gallica in the presence of 1 mM of the laccase-mediator 1-hydroxybenzotriazole (HBT), while β-hydroxybutyric acid resulted from oxidative reactions without HBT. BPA was completely removed within 3 h and pyroglutamic acid was found as a supplementary oxidative degradation product from HBT when identified by GC–MS. Laccase played a critical role in BPA biodegradation and catalyzed a cross-coupling reaction.
Agid:
5536824