Avaliação dos desreguladores endócrinos nas estações de tratamentos de esgotos e água
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2016-03-04
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Universidade Federal de Goiás
Resumo
The toxicology of endocrine disruptors (ED), known as micro-pollutants, disposed in
the environment through urine or excrements may cause physiological changes in
aquatic living things. Therefore, it was aimed to evaluate the 17β – estradiol (E2) and
progesterone and measure the quality of the wastewaters from the effluent of some
Sewage Treatment Plants (STP’s) as of potable water in the Water Treatment Plant
(WTP), located in Goiânia – GO, through the physical and chemical parameters, such
as: Potential Hydrogen (PH), Temperature (T), Electric Conductivity (EC), Turbidity,
Total Dissolved Solids (TDS), Salinity, Dissolved Oxygen (DO), Total Organic
Nitrogen, Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand
(BOD). The quantization of endocrine disruptors was obtained through direct and
competitive ELISA’s method, and all physical-chemical parameters were determined
based on the APHA's Manual (2012). The effluent samples were collected at three
distinct points: affluent (raw sewage), confluence of the effluent to the river (CER)
and downstream of the release in STP’s Hélio Seixo de Brito (HSB), Samambaia (S)
and Parque Atheneu (PA), while the samples of potable water were collected at two
different points: in the capture of João Leite’s stream and after the water treatment in
the WTP Jaime Câmara (JC). Through the physical-chemical parameters evaluated in
the STP’s , the Turbidity , both DO and BOD, do not agree with the standards of
CONAMA 357/05 and 430/11, which means that a lot of organic and inorganic matter
are being dumped into the Meia Ponte River without treatment. In relation to the
JC’s WTP, the same physical-chemical parameters are in accordance with the Decree
No. 2,914 / 11 from the Ministry of Health, which deals with drinking water quality.
The measured values for the E2 in the STP’s ranged in the rainy season around 53, 7
to 178, 24 ng/L and 45, 8 to 275, 0 ng/L in the dry season. In contrast with the progesterone
in the same place where the values ranged from 69, 34 to 97, 54 ng / L in
the rainy season from 60, 2 to 603, 8 ng / L in the dry season. While in the Meia Ponte
River these values to the E2 ranged between 2,04 to 31,62 ng / L in the rainy season
from 6,02 to 72,44 ng / L in the dry season and in relation to progesterone 4,35 to
52,48 ng / L in the rainy season 6,6 to 218,25 ng / L in the dry season. At João Leite’s
stream, where is made the abstraction of the water for treatment, both in the rainy
and drought seasons, E2 values were found 2,13 and 4,89 ng / L and progesterone
5,37 and 6,76 ng / L, however, the treated water that leaves the ETA, it was found in
it values of E2 1,81 ng / L and 2,51 ng / L and progesterone 4,78 ng / L and 4,67 ng /
L during the rainy and dry seasons, respectively. This search concludes that the biological
method ELISA was efficient for the quantification of the studied hormones,
and the values found for both the E2 and progesterone to the STP’s and ETA was
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greater than 1.0 ng / L, and according to the literature these values are able to cause
physiological damage in aquatic species.
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Água , Elisa , Esgoto , Hormônios , Micropoluentes , Toxicologia , Water , Elisa , Sewer , Hormones , Micro-pollutants , Toxicology
Citação
SOARES, Manoel Barbosa. Avaliação dos desreguladores endócrinos nas estações de tratamentos de esgotos e água. 2016. 81 f. Dissertação (Mestrado em Química) - Universidade Federal de Goiás, Goiânia, 2016.