Protection Of Water Contaminated By Chemical And ‎microbial Contaminants For Agriculture: Application Of The ‎advanced Oxidation Process

This paper reports the synthesis, characterization and ‎photocatalytic degradation of alizarin red S (ARS) on the novel ‎new hetero-system ZnO-SnO2, The hetero-system, prepared by ‎chemical route, was characterized by spectroscopy, energy ‎dispersive spectroscopy (EDS) analysis, microscopy, diffuse ‎reflectance and powder X-ray diffraction. Photo-degradation of ‎ARSwas investigated on ZnO, SnO2 and ZnO– SnO2 hetero-‎system. The effect of catalysis dose, initial pH, initial ‎concentration were investigated, the photocatalytic degradation ‎was performed under sunlight irradiation, 84% of (20 mg/L) was ‎degraded within 120 min for concentration. Batch kinetic ‎experiments showed that the degradation follows a pseudo- first-‎order kinetic with a high correlation coefficient (0.994) ‎according to the Langmuir- Hinshelwood model.‎