Estudo da variação temporal da presença de estrógenos em duas ETE do Estado de São Paulo

• Autor(a) principal: Pimentel, Paulo Alexandre [UNESP]
• Data de Publicação: 2014
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/110851
• topic: Química ambiental; Esgotos; Estrogênios; Contaminantes emergentes na água

In recent years emerging contaminants in sewage at concentrations of the order of ng L-1 or μg L-1 has aroused interest in the scientific community by presenting potential to cause adverse effects in humans and animals. Among the emerging contaminants in sewage, we can mention the natural estrogens (17 β-estradiol, estrone, estriol) and synthetic (17 α-ethinylestradiol) which have been of concern because of the large amount released daily into the environment sewage treated or not. Due to the limited studies on the efficiency of Brazilian wastewater treatment plants in the removal of natural and synthetic estrogens, motivated this research in two cities in the state of São Paulo, which will be called the city A and city B, both belonging to UGRHI 9 Mogi-Guaçu and UGRHI 13 Tietê-Jacaré. In the ETE city B raw sewage is treated Cyclic Activated Sludge System, batch; and the ETE city A, raw sewage is treated through a mixed system, using the technology of Upflow Anaerobic Digester and complemented with a treatment by facultative lagoons. The determination of estrogens was performed by optimized and validated method including SPE (C18) for the extraction and pre-concentration of analytes in samples of raw sewage and treated (250 mL) and analysis by HPLC/FLU. The accuracy showed average values over 71% for E2, 78% for EE2, and 80% for E1 with less than or equal to 15% precision for spiked samples. The limits of quantification were 32 ng L-1 for E2; 100 ng L-1 for EE2; and 3,2 μg L-1 for E1, for all matrices investigated. The environmental study includes sampling of raw sewage and treated the WWTP city A and city B for nine months. The concentrations found in raw sewage ranged from 312-2966 ng L-1 for E2; 116-1309 ng L-1 for EE2; and 16-168 μg L-1 for E1; whereas the treated sewage for the concentrations ranged from 95-1591 ng L-1 for E2; 155-4540 ng L-1 for EE2 and 5-80 μg L-1 for E1. In this study the average efficiency observed in...