INTEC   05402
INSTITUTO DE DESARROLLO TECNOLOGICO PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Kinetics modeling of a mixture of pollutants in water using UV/H2O2 process
Autor/es:
M.L. MARIANI; R. BRANDI; A. CASSANO; C.S. ZALAZAR
Lugar:
Rio de Janeiro
Reunión:
Encuentro; VI Encontro sobre Aplicações Ambientais de Processos Oxidativos Avançados; 2011
Resumen:
We report a mathematical model for
representing the time evolution of a mixture of pollutants in water using the
UV/H2O2 process. The employed reactants were dichloroacetic acid (DCA) - a
typical by product of chlorine disinfection - and formic acid, a very simple
model compound. The kinetic model must be independent of the shape, size and
configuration of the laboratory reactor in order to be apt for scaling up
purposes.The experimental device consists of a cylinder sealed with two
parallel, flat windows made of quartz. Irradiation was produced with
low-pressure mercury vapor lamps (253.7 nm). The reactor is placed inside a
recycle with includes: i) the centrifugal pump ii) a heat exchanger for
temperature control iii) a storage tank (VTank=2000 cm3).Experiments where
carried out changing the following variables: (i) hydrogen peroxide/pollutant
mixture initial concentration ratio, ii) initial DCA and Formic Acid
concentration, iii) incident radiation at the reactor wall.
Using de mass action law and the micro steady state approximation, a kinetic
model was developed. This is the first step for the proposal of a sounded
mathematical modeling for the degradation reaction kinetics of more complex
mixtures.