TY - JOUR ID - TI - Degradation of Anthracene by Immobilizing Laccase From Trametes Versicolor onto Chitosan Beads and Hyacinth Plant AU - Ali. A. Taha AU - Nahida J. Hameed AU - Farah. H. Rashid PY - 2020 VL - 31 IS - 3 SP - 14 EP - 20 JO - Al-Mustansiriyah Journal of Science مجلة علوم المستنصرية SN - 1814635X 25213520 AB - Polycyclic aromatic hydrocarbons (PAHs) are recognized as a toxic, mutagenic and/orcarcinogenic compounds, and their pollution of soil and aquifer is of increasing environmentallyrisk. Laccases (E.C. 1.10.3.2) are phenoloxidases catalyze the oxidation of PAHs in thepresence of a mediator compound and hyacinth plant. In this study laccase from Trametesversicolor was immobilized into chitosan, and the potential to oxidize anthracene in thepresence of 1-hydroxybenzotriazole (HBT) was examined. Results indicated that theimmobilization enhanced the stability of laccase against temperature, pH, inhibitors and loadingtime compared with the other cases. The immobilized laccase-mediator system was as efficientas the free enzyme for oxidizing the tested PAHs. After 24h. of incubation, immobilizedlaccase–HBT showed a system oxidization more than immobilized laccase without (HBT) ofPAHs; Chitosan with hyacinth plant and (HBT) resulted better conversion than chitosan with orwithout HBT. These results indicate a new chance for applying the immobilized laccase inbioremediation

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