Modelagem do processo fenton aplicado à degradação de fenol

Abstract

The current pattern of consumption of society combined with population growth, has generated a range and increasing amounts of effluents in general. The difficulties of conventional wastewater treatment and supply in degrading compounds, have driven advanced oxidative processes (AOPs) research. For a rational design of a process such as this, it becomes important to know the transformation rates of the compounds involved in the reactions. In this work, a reduced kinetic model was proposed and adjusted, which was applied for the degradation of phenol by means of the Fenton process. The main contribution is in the development of an interpretation of COT and DQO in terms of their reactional meanings. This interpretation provided the relationship between COT and DQO data with organic matter (MO), organic carbon (CO) and recalcitrant carbon (REC), which are considered in three oxidation reactions. An algorithm was implemented to minimize the objective function of the least squares, which provided optimized values of the três reactional constants proposed in this work. The predicted value of the model was compared with the experimental data of Fe +2 , Fe +3 , H 2 O 2 , DQO and COT over time, taken from the work of Hermosilla et al. (2009). Correlation coefficients were obtained showing satisfactory fit of the experimental data model.