Laccase of Trametes versicolor in combination with 1-hydroxybenzotriazole (HBT) was able to oxidise two polycyclic aromatic hydrocarbons, acenaphthene and acenaphthylene; both compounds were metabolised completely after 70-h incubation. Laccase alone oxidised about 35% of the acenaphthylene and only 3% of the acenaphthene. Single compounds found in a complex mixture of oxidation products were identified. Main products detected after the incubation were 1,2-acenaphthenedione and 1,8-naphthalic acid anhydride. The proposed oxidation pathway seems to be analogous to the metabolism reported for bacteria and mammals. (C) 1998 Elsevier Science B.V. All rights reserved.
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