Four years of estrogenic activity assessment in surface waters of São Paulo State, Brazil
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2017
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Applied Research in Toxicology
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Resumo
Endocrine disrupting chemicals (EDCs) have the ability to
alter the endocrine system of organisms. Such compounds
are present in several industrial and domestic activities and
reach the aquatic environment via wastewater discharges
or agricultural surface runoff. The aim of this study was to
determine the overall estrogenic activity of surface waters
of São Paulo State, Brazil. For this purpose, 10 sites from
the routine Surface Water Quality Program of CETESB
were selected that were already surveyed for physical,
chemical and biological variables from 2013 to 2016.
Samples were extracted in solid phase and tested for
estrogenic activity using bioluminescent yeast estrogen
assay (BLYES). Results were expressed in 17-estradiol
equivalent quotient (EEQ). Estrogenic activity was below
the limit of quantification (0.1 EEQ) in 31.7% of 227
samples. All sites presented estrogenic activity at least
once. The results have shown the presence of estrogenic
activity in a range from 0.11 to 26.6 EEQ in the sampling
sites in four years of study. Statistical analysis showed a
positive correlation between estrogenic activity and the
biochemical oxygen demand performed in the samples,
indicating that this activity detected in most sites is related
to wastewater discharges. Due to the presence of
estrogenicity higher than 5.0 EEQ in a few sampling sites,
further chemical analyses and other bioassays are
recommended in order to provide a better understanding of
the estrogenic activity present at these sites.
Como referenciar
MARTINI, G.A.; FRANÇA, D.D.; SOARES, W.A.A.; TAKEDA, S.H.K.; QUINAGLIA, G.A.; SATO, M.I.Z.; ROGERO, J.R. Four years of estrogenic activity assessment in surface waters of São Paulo State, Brazil. Applied Research in Toxicology, v. 2, p. 32-32, 2017. suppl. 1. Disponível em: http://repositorio.ipen.br/handle/123456789/28109. Acesso em: 04 May 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.