Study of electrochemical degradation, photochemical, and photocatalytic eletrofotocatalitica the hormone ethinylestradiol / Estudo da degradação eletroquímica, fotolítica, fotocatalítica e eletrofotocatalítica do hormônio etinilestradiol

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

In recent years, the environmental research has been facing serious problems in relation to some substances in the aquatic environment in small concentrations, such as the endocrine desruptores pharmaceuticals, natural and synthetic hormones, pesticides, tensosativas substances, polymers of low molar mass and different other organic contaminants present in municipal and industrial effluents, are examples of substances that contribute to change and the functioning of the endocrine system. Several techniques have been used for the degradation of these substances in the aquatic environment, but none demonstrated effectiveness.This work aimed to study the degradation of the hormone ethinyl estradiol which is a therapeutic agent and is widely used in contraceptive method. It is worrying the increasing use of this substance because it is found in various parts of the world.It was tested four techniques of degradation of the hormone, (a) electrolysis, (b) photolysis, (c) photocatalysis and (d) photoelectrocatalysis. The working electrode of glassy carbon was used in KCl medium for electrolysis. As catalyst, was used Ti/TiO2 in the photocatalysis and photoelectrocatalysis. The degradation process was followed by UV-vis spectroscopy and HPLC chromatography.It was carried out tests to identify the formation of chlorate and hypochlorite in the samples once these species can help the degradation in electrochemical and photochemical process.

ASSUNTO(S)

degradação degradation fotoquímica electrochemical photochemical eletroquímica etinilestradiol ethinylestradiol

ACESSO AO ARTIGO

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