Remoção de hormônios sexuais sintéticos por carbonização hidrotermal e por fungos de decomposição branca
Carregando...
Data
2012-08-29
Autores
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
Contaminations of water and wastewater with endocrine disrupters from domestic and
industrial discharges have been proven in several regions of the planet. Among the endocrine
disruptors, the synthetic sex hormones cause great concern because the presence of phenolic
rings in their structures makes them stable and recalcitrant in the environment. In Goiás, the
presence of synthetic sex hormone concentrations of ethinylestradiol in mg.L-1 in the Meia
Ponte River, which goes accross the metropolitan area of Goiânia, was recently confirmed.
Studies have shown that concentrations of ng.L-1 can affect sexual differentiation and cause
serious damage to the reproductive system in fish and humans. Further, there are few
techniques that are proven of being effective on removing this type of substance. The aim of
this study was to evaluate the removal of synthetic sex hormones ethinylestradiol, gestodene,
and cyproterone acetate by the hydrothermal carbonization process and biological treatment
with fungi decomposing white Pycnoporus sanguineus and Trametes villosa. For this
purpose, solutions were prepared, individually and in combination with a concentration of 1,0
μg.mL-1 and pH correction into the range of 2-3 with solutions of phosphoric acid or citric
acid for treatment with hydrothermal carbonization. For the treatment with the fungus in
liquid culture medium and under the condition of stirring, a solution was prepared containing
all three hormones (ethinyl estradiol, cyproterone acetate and gestodene) in concentrations of
0,333 μg.mL-1. The carbonization treatments by the process of hydrothermal three hormones
with pH correction made with phosphoric acid and reaction time of 90 minutes showed
satisfactory removal of Ethinylestradiol and Gestodene, above 90%. Already in the individual
treatments, removal achieved was higher than 99% for all three hormones. The biological
treatment with Pycnoporus sanguineus and Trametes villosa show significant removal of
hormones and cyproterone acetate Ethinylestradiol above 99% and 78.9% for Gestodene for
both fungi. It was possible to notice that the presence of hormones increased the enzymatic
production of laccase, with peak production anticipated for the fungus Pycnoporus
sanguineus. The toxicity test with Artemia salina was observed that the solution with the
three hormones after carbonization hydrothermal treatment had fewer dead larvae of Artemia
salina, than the solution with hormones without treatment. In test germination of Allium cepa,
the solution treated with hormones hydrothermal carbonization showed the same germination
rate of the control group, however, less vigor of the shoots. As the control group, the solution
to the three hormones before treatment and after biological treatment, the 9.09%
concentration, showed no mortality of larvae of Artemia salina. These results show that both
the hydrothermal carbonization process as with the fungus Pycnoporus sanguineus and
Trametes villosa, show potential for future applications of synthetic sex hormones removal of
contaminated waters and effluents.
Descrição
Citação
MORAIS, R. L. Remoção de hormônios sexuais sintéticos por carbonização hidrotermal e por fungos de decomposição branca. 2012. 135 f. Dissertação (Mestrado em Engenharia do Meio Ambiente)–Universidade Federal de Goiás, Goiânia, 2012.