Occurrence and removal of endocrine disruptor compounds in drinking water at Campinas and Sumare, Sao Paulo State, Brazil / Ocorrencia e remoção de disruptores endocrinos em aguas utilizadas para abastecimento publico de Campinas e Sumare - SP

AUTOR(ES)

Eleonilce Rosa Rossi Gerolin

DATA DE PUBLICAÇÃO

2008

RESUMO

The occurrence of potential endocrine disruptor compounds (EDC) in wastewater treatment plant (WWTP) effluent and surface waters at high concentrations harmful for aquatic life has been an interesting research field due to the probability of these micro pollutants to break through water treatment plant (WTP). The present paper evaluated the occurrence of natural estrogens such as estrone (E1), 17ß-estradiol (E2), estriol (E3), as well as the synthetic estrogen 17a ethinylestradiol (EE2) and nonylphenol (NP) at water supply systems of Campinas and Sumaré. Raw water from Atibaia River and treated water samples were collected from Campinas WTP-3-and-4 and Sumaré WTP-2 over a three-week period. The analytic technique used was solid phase extraction and liquid chromatography/ tandem mass spectrometry (LC-MS/MS). The average results obtained for drinking water in Campinas and Sumaré were, respectively, 0.03 and 0.06ng/L for E1, 0.93 and 1.32ng/L for E2, 0.70 and 0.72ng/L for E3, 91.2 and 154ng/L for EE2 and 6.14 and 4ng/L for NP. Campinas WTP obtained an average removal of = 80% of focused EDC, except for EE2, whose efficiency was 38%; Sumaré WTP removal efficiency was 80% for E1 and E2, 60% for E3 and NP and 41% for EE2. Chlorine oxidation was probably the major treatment step for EDC removal, though potentially estrogenic by-products could have been formed as well. The presence of EDC in drinking water, despite the low concentrations, could provide estrogenic activity, since it is well known that natural and synthetic estrogen in the environment can produce effects at very low concentration (1ng/L)

ASSUNTO(S)

drinking water estrogenos estrogens Água - consumo water treatment plant agua - estações de tratamento

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