Estudos de remoção de 17 alfa -etinilestradiol de aguas para abastecimento, utilizando dioxido de cloro, hipoclorito de sodio, carvão ativado em po (cap) e tratamento fisico-quimico / Studies of 17 alfa -etinilestradiol removal from supplying water, using chorine dioxide, sodium hipoclorite, powder activated carbon (cap) and physicist-chemistry treatment

AUTOR(ES)

Roberto Fernandes

DATA DE PUBLICAÇÃO

2007

RESUMO

The 17`alfa´-Etinilestradiol is a synthetic active pharmaceutical ingredient presents in the formulation of contraceptives used by a large amount of the female population. As a bioaccumulative molecule, the 17`alfa´-Etinilestradiol is not completely absorbed by woman organism; up to 80% can be eliminated by user, mainly by urine. Even after sewage treatment, the residual of 17`alfa´-Etinilestradiol it is not totally removed reaching, later, water sources that can be used for public supplying. In this direction, the present work has for objective the study of 17`alfa´-Etinilestradiol removal efficiency in waters supplies, using different technologies such as: pre-oxidizing with Sodium Hypochlorite or Chlorine Dioxide, adsorption in powder activated carbon (CAP) and physic-chemical treatment composed by coagulation, flocculation, sedimentation and fast filtration. The methodology used for the estrogen determination was the High Performance Liquid Chromatography (HPLC), applied after solid phase extraction process (SFE) of the hormone present in water. The HPLC equipment used was composed by a model C18 chromatographic column with reverse phase, and diodes arrangement detector, with UV. The work showed that the Sodium Hypochlorite was more effective than the Chlorine Dioxide, to the 17`alfa´-Etinilestradiol oxidizing. Its higher action was observed when applying 5 and 10 mg/L of oxidants in a time of reaction between 3 and 5 hours. This interaction between concentration of oxidant and time of reaction provided estrogen concentration reduction in water, in levels upper to 97.5%. This same removal level also was observed when applied powder activated carbon, mainly when 50 mg/L in a contact time of 60 minutes was performed. The physic-chemical treatment presented better results when 5 mg/L of activated carbon was applied. The present results consist of fundamental importance in the base formation for future solutions dedicated to the problem, due to lack of studies present now a days in pharmaceutical products removal from water

ASSUNTO(S)

water treatment agua potavel agua - purificação - floculação hipoclorito de sodio 17 alfa -etinilestradiol hplc agua - purificação agua - purificação - coagulação chlorine dioxide endocrine disruptor sodium hypochlorite oral contraceptive carbono ativado coagulation powder activated carbon floculation

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