فایل رایگان Use of TiO2/CMK-3 photo-catalyst in photo-degradation of phenol under medium pressure UV lamp

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بخشی از متن فایل رایگان Use of TiO2/CMK-3 photo-catalyst in photo-degradation of phenol under medium pressure UV lamp :


سال انتشار : 1397

تعداد صفحات : 6

چکیده مقاله:

The phenol due to its characteristics including chronic toxicity, the nature of biological stability and increasing the toxicological intermediates after biological degradation is considered as one of major environmental concerns. Therefore, the aim of this study is to evaluate the photo-degradation of phenol using the titanium dioxide photo-catalyst on ordered mesoporous carbon (CMK-3) support in photo-degradation under UV irradiation. In this study, the effect of parameter including pH (4, 5, 6, 7, 8, 9, 10), TiO2/CMK-3 concentration (0.05, 0.1, 0.15, 0.3, 0.5g/l), irradiation time (30, 60, 90,120,150 min) and phenol concentration (50, 100, 150 and 200 mg/L) was assessed. The characteristics of the CMK-3 and TiO2/CMK-3 were compared using the Transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and N2 adsorption-desorption. The results revealed that the process studied is remarkably affected by the parameters and the optimum values of the parameter are as follows: pH=6, TiO2/CMK-3 concentration =0.15 g/L, phenol concentration = 100 mg/L, and irradiation time=150 min. The phenol degradation efficiency and total organic carbon (TOC) removal efficiency for phenol was 96% and 74%, respectively. Moreover, the stability of the studied photo-catalyst greater than 7 times is indicative of its high potential to be used as photo-degradation processes to eliminate the pollutants.

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