الفهرس 
Water pollution
Advanced Oxidation Processes(AOPs)Only 14 pages are availabe for public view
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Abstract
The seven- coordinate iron complex [ pyN3Me2S2)FeII(ClO4)2] was synthesized and completely characterized by different techniques.TiO2 nanostructure was also synthesized by thermal method and characterized by XRD,SEM,UV and PL techniques. Acid Green 25 was selected as model organic pollutant in wastewater to evaluate the catalytic activity of the synthesized compounds.The catalytic activity of the complex was determined under different conditions by kinetic measurements.Among these conditions are the concentration of the complex, H2O2 oncentration, dye concentration and the temperature.The photocatalytic efficiency of TiO2 nanostructure, ZnO and commercial TiO2 were evaluated under different experimental conditions such as the effect of dye oncentration, and catalyst amount. In the beginning, the solar simulator was used as a standard source of one sun (1kw/m2). Natural sunlight was used to have lower cost and allows for a wider choice of substrates and greater chance of scaling-up in the industry. ZnO was the best catalyst used for the degradation of AG 25. In addition, the maximum degradation efficiency obtained under comparable conditions was 95.46 % in case of solar simulator, and 88.63 %in case of natural sunlight. For more verification of the attained results, the photocatalytic activity of ZnO under natural sunlight irradiation on the degradation of two other pollutant dyes,Ponceau 4R, and Titan yellow was studied. The two dyes were degraded efficiently if ZnO and natural sunlight were coupled against these dyes. Reasonable mechanisms for the degradation processes were proposed.