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KMID : 0379119980260010008
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Korean Journal of Mycology
1998 Volume.26 No. 1 p.8 ~ p.15
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Decolorization of Azo , Triphenylmethane and Heterocyclic Dyes by Irpex zonatus BN2
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Abstract
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The present research was undertaken to investigate the activity of ligninolytic enzymes and the decolorization capability of some dyes with Irpex zonatus BN2, isolated from nature and identified. For the assay of enzyme activities, the isolate did not produce lignin peroxidase (LiP) and veratryl alcohol oxidase (VAO), but lactase and manganese dependent peroxidase (MnP). While the activity for MnP was low (61.6 nmol/㎎·protein), its lactase activity was very high (1185.9 nmol/㎎·protein). Moreover, laccase had appeared earlier than MnP. When the isolate was incubated with each dye for 10 days, the decolorization rates of azo dyes, such as orange II, orange G, tropaeolin O and Congo red were 98.0%, 97.4%, 99.0% and 95.3%, respectively. In case of heterocyclic dyes, eosin Y, toludine blue, methyl blue and azur B were 97.4 %, 98.7%a, 99.9% and 94.0% respectively. Finally the results of triphenylmethane dye such as basic fuchsin, malachite green and crystal violet were 98.5%, 95.7% and 99.4%, respectively. The results suggest that lactase of Irpex zonatus BN2 should be played au important role in the decolorization of the dyes.
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