Use of sunlight energy to eliminate pollutants in waste water from chemical laboratories
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Date
2009
Journal Title
Journal ISSN
Volume Title
Publisher
Corporación Universitaria Lasallista
Área Metropolitana del Valle de Aburrá
Área Metropolitana del Valle de Aburrá
Abstract
Introduction. The use of sunlight energy to eliminate pollutants in waste water, by the use of
an appropriate catalyst, uses the sunlight that arrives directly to the Earth to produce several
chemical reactions which allow the elimination of organic compounds in the water from urban,
industrial and agropecuary effluents and change the oxidation state of heavy metals in a way
that they pass from being soluble to an insoluble form.
Objective. To evaluate the water degradation with methylene blue used to analyze some
tests in chemicals laboratories by the use of a photosensitizer, using sunlight.
Materials and methods. The degradation and mineralization of waste water with methylene
blue by means of the sunlight was made. Different tests were made with the hydrogen peroxide,
titanium dioxide and air combination. The degradation of this waste water was followed
by the color reduction at a 650nm wavelength and the COD technique was used for the
mineralization.
Results. The optimal concentration of photo catalyst and oxidation agent for the degradation
of waste water with methylene blue in a 30 mg/L concentration rate in the water found in this
research work are: L20 mg/L of TiO2 and 2 mL H2O2/L with an air injection.
Conclusion. Very good results in color degradation and lower mineralization percentages
were found in an eight hour time of sunlight irradiation.
Description
Keywords
Fotocatálisis, Área Metropolitana del Valle de Aburrá, Corporación Universitaria Lasallista, Peróxido de hidrógeno (H2O2), Dióxido de titanio (TIO2), Tratamiento de aguas residuales, Aguas residuales industriales, Aguas residuales, Contaminación ambiental