Eliminación de contaminantes parabenos en agua mediante procesos físicos, químicos y electroquímicos

Resumo

This Doctoral Thesis aims to study the elimination of four emerging contaminants commonly found in wastewater and surface: methylparaben, ethylparaben, propylparaben and butylparaben. Currently, these compounds are widely used as preservatives in cosmetics, pharmaceuticals, foodstuffs and industrial products. To carry out these contaminants removing emerging physical processes (adsorption resins and natural tannins), chemical processes and electrochemical processes are investigated. Adsorption processes are carried out using OPTIPORE L493 and Dowex different adsorbents tanínica natural base. Thus the influence of operational variables studied in adsorption processes for the four paraben compounds in a matrix of ultrapure water. Furthermore, it is carried out for the study of kinetic and equilibrium adsorption. Moreover, the oxidation of these pollutants is studied by techniques Electrochemical. anodic oxidation treatments are applied using electrodes boron doped diamond (BDD). Finally, various advanced chemical oxidation processes are investigated for degradation study compounds: UV / H2O2, Fe2 + / H2O2 (Fenton's reagent), UV / Fe2 + / H2O2 (photo-Fenton), UV / TiO2, UV / TiO2 / H2O2, O3, O3 / Fenton, O3 / H2O2 , O3 / UV, O3 / UV / H2O2, O3 / photo-Fenton, O3 / UV / TiO2 and O3 / UV / TiO2 / H2O2. In the electrochemical and chemical processes planning experiences carried out by designing experiments, statistical tool that optimizes the number of experiments, the results and offers possible interactions among the most significant variables. These processes have been applied both in ultrapure water, and water from the river, EDAR and swamp.