Degradação de amoxicilina por processos oxidativos avançados

Abstract

Nowadays, the concern with water pollutants has been increasing in the scientific community, where several researchers have been dedicated to study emerging contaminants in the water where among the contaminants are highlighted residues of drugs, classified as micropollutants because their concentrations are in the range of ng / L and μg / L, creating problems like pollution of water resources and increased bacterial resistance in the environment, despite the fact that their concentration is low. Amoxicillin is one of the most widely used antibiotics in the world and because of this and the low absorption in the human body (about 25%) is one of the micropollutants that are found in several treatment plants as well as water basins where effluents are discharged. The present work aims to analyze the degradation of amoxicillin using UV photolysis.The method used was the direct photolysis that consists of the incidence of the radiation in the sample obtaining radicals that make its oxidation generating products and degrading the sample. For this, experiments were organized to evaluate the influence of the radiation on the sample and the pH in which it is found. The pH 5.0; 7,0 and 10,0 was used for the present studyand as source of radiation UV-A, UV-B, UV-C and solar radiation. In all experiments, the conversion of amoxicillin was achieved, obtaining the best results for pH 5.0 with UV-A radiation with conversion of approximately 60%, a trend is observed that as the wavelength of the radiation and the pH around 6-7 increasing the reaction of amoxicillin.