Degradation of repellent DEET by Pleurotus ostreatus laccases
Keywords:
Remediation, Pleurotus ostreatus, DEET, Chromatography, High Pressure Liquid, LaccaseAbstract
Objective: We evaluated the remediation capacity of DEET in liquid medium by the white decomposition fungus Pleurotus ostreatus using the solid residues of cocoa as an enzymatic inducer and performed toxicity bioassays with the post-treatment samples, for water treatment applications. Method: Enzymatic production with cocoa residues was performed. Bioremediation with the enzyme broth was performed in a 250mL erlenmeyer flasks, containing the solution of the compound, sodium acetate buffer pH 5 and the potato broth, incubated at 28 °C, with rotation of 120 rpm, for 48 hours. With the active fungus, the same was incubated at 28 ºC and had in its culture medium the addition of the compound. The samples were quantified in high performance liquid chromatography (HPLC). The adsorption test was performed with the autoclaved fungus and analyzed after 14 days. Results: The compound was possibly toxic and the remediation showed a linear tendency of degradation of 39% with the fungus. Conclusion: Pleurotus ostreatus is a promising candidate for the treatment of contaminants generated by DEET.
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