Degradación del colorante tartrazina mediante fotocatálisis heterogénea empleando lámpara de luz ultravioleta
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2012-08-10
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Área Metropolitana del Valle de Aburrá
Corporación Universitaria Lasallista
Corporación Universitaria Lasallista
Resumen
Introduction. The prevention and control of environmental pollution is one of the main responsibilities
and concerns of modern men. In recent years a great number of research works
have been made for such a purpose, among these we can remark pollutants biodegradation
works. This is an advanced technique that aims to reduce or eliminate persistent compounds
such as Azo dyes.
Objective. To evaluate the degradation of the tartrazine dye by the use of heterogeneous
photocatalysis with titanium dioxide and an ultra-violet light lamp.
Materials and methods. A factorial randomized experimental design was used. For developing
the experiment we used an ultra violet light lamp, a glass container for keeping the
tartrazine dye in an aqueous solution and treat it and a pump that allowed the re-circulation
of the solution through the photoreactor system. The degradation of the tartrazine dye was
determined by the use of ultra-violet/visible espectrophotometry.
Results. A good tartrazine dye removal rate was obtained (100,0%) for the combination of
chemical oxidation by the use of 0 mg/L of TiO2 and,4 %v/v of the oxidation agent hydrogen
peroxide, and the experimental combination of the photo chemical process of heterogeneous
photocatalysis with the experimental rehearsals of 50 mg/L of TiO2 and 0,2 %v/v H2O2 and 50
mg/L of TiO2 and 0,4 %v/v H2O2 for a removal rate of 100,0%.
Conclusion. Advanced oxidation processes are adequate for removing and eliminating the
tartrazine dye.
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Fotodegradación, Corporación Universitaria Lasallista, Área Metropolitana del Valle de Aburrá, Tartrazina, Fotocatálisis heterogénea, Aguas residuales, Contaminación, Tratamiento de aguas residuales, Colorante azoico, Dióxido de titanio (TIO2), Peróxido de hidrógeno (H2O2), Industria alimenticia