Modelado cinético de la degradación fotocatalítica de fosfatos a diferentes concentraciones de (TiO2)

Abstract

The objective of this research was to kinetically model the photocatalytic degradation of phosphates with titanium dioxide (TiO2) for which data on phosphorous pollutants and photocatalysts from high impact articles and documents were extracted, where a photo degradative analysis of the data obtained was made. The data were obtained from technical reports of rivers and aqueducts from different places in Ecuador, where, for this work, the maximum value of phosphate contamination is 0.21mg / l and 300 mg / l of titanium dioxide. Also, to carry out the modelling, the interaction provided by TiO2 with different phosphorous pollutants was taken into consideration. These parameters make it possible to determine an equation that relates the holes/electron of the photocatalyst and the phosphate groups to be degraded. By applying the Langmuir - Hinshelwood adsorption model in this system, a simplified equation is generated, with which the experimental data is applied. For the statistical analysis, the Pearson Correlation Model, and the Linear Regression model (equation of the line) was used, which allowed us to obtain the absorption constants of each reagent used in this investigation. It is concluded that kinetic modelling allows showing how a photocatalyst generates a significant decrease in the degradation time of orthophosphates and polyphosphates and the application of digital tools to obtain a viable system in the remediation of pollutants, offering optimization of resources and time.