Cinética de degradación y mineralización del colorante Naranja Reactivo 84 en aguas
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Date
2005
Journal Title
Journal ISSN
Volume Title
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).
Description
Keywords
Fotocatálisis, Corporación Universitaria Lasallista, Dióxido de titanio (TIO2), Fotodegradación, Naranja reactivo 84, Aguas residuales, Tratamiento de aguas residuales, Irradiación solar