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Cinética de degradación y mineralización del colorante Naranja Reactivo 84 en aguas

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Date

2005

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Publisher

Corporación Universitaria Lasallista

Abstract

Introduction: The use of sunlight to eliminate contaminants from waste water by the use of an appropriate photocatalizer, allows the direct use of the solar energy that comes to earth, starting several chemical reactions that eliminate organic compounds from waste water with urban, industrial and agro cultural origins, and change the oxidation status of heavy metals in a way that they turn from a issolved form to an insoluble one. Objective: To determine the kinetics of degradation and mineralization of reactive orange 84 dye present in water. Materials and methods: To determine the kinetics of degradation and mineralization of the Orange reactive 84 dye during photocatalisys, we proved the order of the reaction for each experiment made, considering the color concentrations and remaining chemical demand of oxygen (OCD) to, later, determine the constants of velocity and life time media of the color present in the water after the 8 hours of treatment. Results: The optimal concentration of photocatalyst and oxidation agent to degrade the reactive orange 84 in a concentration in water of 340mg/L found in our research were: 40 mg/L of TiO2 and 2 mLH2O2/L with no air injection, because it diminishes the percentage of final degradation of the dye. Conclusion: One of the technologies of this kind that can be interesting for decontaminating water with toxic organic substances is the photocatalitycal degradation based on the use of titanium dioxide (TiO2) as photocatalyst and low energy ultra-violet sunlight (320-390nm).

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Keywords

Fotocatálisis, Corporación Universitaria Lasallista, Dióxido de titanio (TIO2), Fotodegradación, Naranja reactivo 84, Aguas residuales, Tratamiento de aguas residuales, Irradiación solar

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