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Tehran University of Medical Sciences, Iranian Journal of Environmental Health Science and Engineering, 1(9), 2012

DOI: 10.1186/1735-2746-9-27

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Synthetic dye decolorization by three sources of fungal laccase

Journal article published in 2012 by Hamid Forootanfar, Atefeh Moezzi, Marzieh Aghaie-Khozani, Yasaman Mahmoudjanlou, Y. Janlou, Alieh Ameri, Farhad Niknejad ORCID, Mohammad Ali Faramarzi ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Decolorization of six synthetic dyes using three sources of fungal laccase with the origin of Aspergillus oryzae, Trametes versicolor, and Paraconiothyrium variabile was investigated. Among them, the enzyme from P. variabile was the most efficient which decolorized bromophenol blue (100%), commassie brilliant blue (91%), panseu-S (56%), Rimazol brilliant blue R (RBBR; 47%), Congo red (18.5%), and methylene blue (21.3%) after 3 h incubation in presence of hydroxybenzotriazole (HBT; 5 mM) as the laccase mediator. It was also observed that decolorization efficiency of all dyes was enhanced by increasing of HBT concentration from 0.1 mM to 5 mM. Laccase from A. oryzae was able to remove 53% of methylene blue and 26% of RBBR after 30 min incubation in absence of HBT, but the enzyme could not efficiently decolorize other dyes even in presence of 5 mM of HBT. In the case of laccase from T. versicolor, only RBBR was decolorized (93%) in absence of HBT after 3 h incubation. © 2012 Forootanfar et al.; licensee BioMed Central Ltd.