MONITORING AND REMOVAL OF ANTI-INFLAMMATORY DRUGS IN SEWAGE TREATMENT PLANT WITH STABILIZATION POND

• Autor(a) principal: Ragassi, Bruna
• Data de Publicação: 2019
• Outros Autores: Américo-Pinheiro, Juliana Heloisa Pinê, Isique, William Deodato, Silva Junior, Osmar Pereira da
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Brasileira de Ciências Ambientais (Online)
• Texto Completo: https://www.rbciamb.com.br/Publicacoes_RBCIAMB/article/view/502
• topic: Diclofenaco; ibuprofeno; naproxeno; Effluent; Diclofenac; Chromatography

The monitoring of residual drugs in the environment has been gainingattention, as they are frequently detected in sewage treatment plants (STP)and reach the water bodies. Therefore, the aim of this study was to evaluatethe presence, concentration and percentage of anti-inflammatory removalin samples of raw sewage and treated effluent from the sewage treatmentplant of Dracena-SP. Two collection points were assessed at the STP namedP1 (raw sewage) and P2 (treated effluent). The collections and analyses wereperformed from March 2017 to February 2018. The samples were preparedby dispersive liquid-liquid microextraction and analyzed by high performanceliquid chromatography. The presence of the drugs diclofenac, ibuprofen andnaproxen was detected in the two analyzed points of the STP. Ibuprofen wasthe compound with the highest concentration in raw sewage (95.92 μgL-1).In winter months, the lowest concentrations of anti-inflammatory drugs inthe raw sewage and the lowest percentages of drug removal in the STP wererecorded. In July, ibuprofen and naproxen were not detected in P1 nor P2.The presence of these drugs in raw sewage is attributed to the disposal of medicines in sinks and toilets, as well as excretion via faeces and urine with drug residues that are not fully absorbedby the human body. The treatment of domestic sewage through stabilization ponds does not completely remove theseanti-inflammatories, providing the input of these substances in surface waters, altering their quality.