Degradation Of Basic Yellow 28 By Heterogeneous Photocatalysis In Suntest In Aqueous Suspension Of Tio2, Zno And Fe2o3

Résumé: This study aims to evaluate the effectiveness and applicability of a new advanced oxidation process (UV / semiconductor) for the treatment of waste water. Photocatalysis is a very robust technology that is capable of destroying a wide range of recalcitrant organic contaminants and is equally effective on highly reduced contaminants such as basic yellow 28 (BYE28) cationic dyes. In Suntest CPS+, an attempt has been made to optimize the process parameters. The efficiency degradation of Basic yellow 28 (BYE28) dye in aqueous suspensions of TiO2, ZnO and Fe2O3 is strongly depends on the operating conditions. The rate of photodegradation increases with the increasing of the quantity of catalysts to know (TiO2, ZnO and Fe2O3) from 0.5 to 3g/L and after that rate decreases in the case of the three catalysts, the optimum quantity was found to be 1g/L. The photodegradation rate increases with the increasing of the initial concentration of Basic yellow 28 (BYE28) dye in aqueous suspensions of TiO2, ZnO and Fe2O3 from 1 to 50 mg/L after that it decreases in the rage from 50 to 150 mg/L . The better degradation of Basic yellow 28 (BYE28) dye was found at basic pH range for the three catalysts. The degradation rate of Basic yellow 28 increases with increasing temperature in the range studied is to know from 15 to 55 °C in the case of the three catalysts. The photodegradation rate of Basic yellow 28 (BYE28) dye in aqueous suspension of TiO2 P25 increases with the increasing of radiation intensity from 250 to 500 W/m2 after that, it remained constant from 500 to 750 W/m2. TOC decreases with treatment, confirming that the photocatalytic process leads to a decrease in organic matter content.

Publié dans la revue: Algerian Journal of Engineering Research