Avaliação da degradação de Benzofenona por Trametes sp

Abstract

Solar filters used daily are considered as emerging contaminants in water bodies, accumulate in the sediment and biota, triggering progressive ecotoxicological effects and contamination of the aquatic system. Considering its difficulty of removal in the sewage treatment stations, researches have been carried out in order to find methods that promote the degradation of these compounds. This study aims to evaluate the degradation of benzophenone-3 by Trametes sp. The research was divided in three stages, in the first step was carried out the variation of three factors: type of inoculum, type of cultivation and the culture medium. In this study the total removal did not show significant difference with the variation of the conditions, taking into account that the complete medium is richer in nutrients and that this one showed greater consumption of glucose it was chosen to follow the research. In the second stage, Tween 80 and CuSO4 were added to optimize the studies and in addition to the complete medium, a new nutrient rich laccase inducing culture medium was used, which resulted in high biodegradation, adsorption and removal (97%) of BP3, in the media with the addition of tween greater adsorptions were observed. In the third stage the degradation was monitored in the best conditions of the previous study, during 12 days, being analyzed the amount of BP3 in the liquid, the mycelium, reducing sugars, and the quantification of laccase. The removal of BP-3 was high, with 93.9% in the first sampling (fourth day), in this study it was possible to produce more than eight thousand units of laccase per liter of culture. Under the conditions studied it can be said that the removal of BP3 can be obtained using fungal treatment.