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KMID : 0382420040300020079
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Korean Journal of Environmental Health Society
2004 Volume.30 No. 2 p.79 ~ p.83
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Reaction Conditions for Laccase Catalyzed Degradation of Bisphenol A
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Kim Young-Jin
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Abstract
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The oxidative degradation of BPA with laccase from Trametes versiclor was conducted in a closed, temperature controlled system containing acetate buffer for pH control. The effects of medium pH, buffer concentration, temperature and mediator on degradation of BPA were investigated. The inactivation of the enzyme by temperature and reaction product was also studied. The optimal pH for BPA degradation showed about 5. Buffer concentration did not affect BPA degradation. On the other hand. the enzyme stability was higher at low concentration buffer (25 mM). Temperature rise increased the degradation rate of BPA up to 45°C. The valuable mediator of laccase for BPA was ABTS. Elevated temperature and reaction product irreversibly inactivated the enzyme.
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