Decolorization and Detoxication of Reactive Industrial Dyes by Immobilized Laccases

Ge Yang; Ke Shuai Lu; Xue Yan Su

doi:10.4028/www.scientific.net/AMR.550-553.2279

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 550-553Decolorization and Detoxication of Reactive...

Decolorization and Detoxication of Reactive Industrial Dyes by Immobilized Laccases

Abstract:

Laccase immobilized on polyurethane foam cubes in bioreactors, were used to decolorize three industrial and model dyes at concentrations of 200, 1000 and 2000 ppm. Five sequential cycles were run for each dye and fungus. The activity of laccase, Mn-dependent and independent peroxidases, lignin peroxidase, and aryl-alcohol oxidase were daily monitored during the cycles and the toxicity ofmedia containing 1000 and 2000 ppm of each dye was assessed by the Lemna minor (duckweed) ecotoxicity test. Laccase was able to efficiently decolorize all dyes even at the highest concentration, and the duckweed test showed a significant reduction (p≤ 0.05) of the toxicity after the decolorization treatment. Laccase activities varied greatly and no clear correlation between decolorization and enzyme activity was obselved a high laccase activity during decolorization cycles. Laccase showed better decolorization and detoxication capability.

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Periodical:

Advanced Materials Research (Volumes 550-553)

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2279-2283

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https://doi.org/10.4028/www.scientific.net/AMR.550-553.2279

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Online since:

July 2012

Authors:

Ge Yang, Ke Shuai Lu, Xue Yan Su

Keywords:

Decolorization, Detoxication, Laccase, Reactive Industrial Dyes

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