algerian journal of environmental science and technology
Volume 3, Numéro 1, Pages 9-14
2017-04-30
Protection Of Water Contaminated By Chemical And microbial Contaminants For Agriculture: Application Of The advanced Oxidation Process
Authors : Bouchaaba H . Maachi R . Nasrallah N . Bellal B . Trari M . Amrane A .
Abstract
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.
Keywords
photocatalysis, ZnO–SnO2 heterosystem, alizarin red S, sunlight irradiation, Langmuir- Hinshelwood model.
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