Avaliação exploratória de aplicação de ultrassom indireto associada a malha metálica passiva para remoção de 17α-etinilestradiol em meio aquoso
- Resumo
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Poluentes capazes de comprometer os sistemas endócrinos de seres humanos e da fauna representam importante ameaça ambiental. Hormônios sintéticos, como o 17α-etinilestradiol (EE2), e hormônios naturais, ao alcançarem os corpos d'água, constituem um desafio para sua remoção em níveis satisfatórios. O ultrassom é uma técnica considerada ecológica e sustentável, empregada para intensificar processos em diferentes matrizes. Este estudo avaliou o potencial de remoção de EE2 em água por aplicação indireta de ultrassom na presença de telas metálicas. Foram investigadas as frequências (25 e 37kHz), as temperaturas (25 e 30°C), os tempos de aplicação de ultrassom (15 a 45 min) e as massas de tela metálica (11 e 24g). Por razões de economicidade, utilizou-se espectrofotometria UV-Vis, com processamento por segunda derivada, para monitorar o efeito dos tratamentos, com resultados confirmados qualitativamente por cromatografia gasosa acoplada à espectrometria de massas (GC-MS) aos 45min. Os resultados mostraram que o ultrassom isolado promoveu remoção máxima de 7,2% de EE2, enquanto a presença de telas metálicas aumentou essa remoção para até 21,2%, particularmente a 30°C. Sugere-se, em estudos futuros, investigar outras técnicas analíticas para confirmar a efetividade de remoção de EE2.
- Biografia do Autor
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