Estudo da degradação do paracetamol (acetaminofeno) por fotocatálise heterogênea Amazônicas

Abstract

Easy acess to drug purchase and self-medication are factors rooted in Brazilian customs, such factors increase the incorrect disposal the medicaments in the environment consequently, drugs such as acetaminophen are found in natural system. With the focus of degrading acetaminophen. Heterogeneous photocatalysis has been an efficient means study to removed. Within this problematic this work has objective the study of acetaminophen degradation by heterogeneous photocatalysis using the titanium dioxide catalyst. This work studied of the influence of time, pH and the presence catalyst on conversion of the drug. In experimental design was studied: time the 1 and 2h, pH 5 and 9 and for the catalyst observed drug conversion with the same without. The study was carried out through an experiment in a photocatalytic batch reactor, where the solution containing the drug was placed in a 1 L volume vat and the placed in a parallelepiped shaped reactor 27 x 54,8 x 20 cm and a 36 W bulb couple inside the reactor. In all, 16 were performed, as a duplicate was required, and the system response was to observe the conversion of drug. By analyzing the Pareto diagram, the variables studied were not significant for the system response, however the results show that even in low amounts it was possible to degrade the drug. However the results show that even in low amounts drug degradation possible. The highest degradation was 17,42%, obtained pH = 9, the time of 2 hrs and without the catalyst, but it was observed that the solution that had catalyst had degradation in more than one assay. It was concluded that the proposed model was not significant for this process, but it was possible observe the degradation of acetaminophen by effects of time and pH.