Author/Authors :
Dadban Shahamat، Yousef نويسنده 1Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran , , Farzadkia، Mahdi نويسنده Associate Professor, Department of Environmental Health Engineering , , Nasseri، Simin نويسنده 1Department of Environmental Health Engineering, School of Public Health and Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran , , Mahvi، Amir Hossein نويسنده Department of Environmental Health Engineering, School of Health; National Institute of Health Research; Center for Solid Waste Research, Institute fo , , Gholami، Mitra نويسنده 1Depatment of Environmental Engineering, School of Public Health, Center for Water Quality Research, Tehran University of Medical Sciences, Tehran, Iran , , Esrafili، Ali نويسنده Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran ,
Abstract :
In this study, a new strategy in catalytic ozonation removal method for degradation of phenol from industrial
wastewater was investigated. Magnetic carbon nano composite as a novel catalyst was synthesized, characterized
and then used in the catalytic ozonation process (COP) and compared with the single ozonation process (SOP).
The influential parameters were all investigated. The results showed that the removal efficiency of phenol and COD
(chemical oxygen demand) in COP (98.5%, 69.8%) was higher than those of SOP (78.7%, 50.5%) and the highest
catalytic potential was achieved at optimal neutral pH. First order modeling demonstrated that the reactions were
dependent on the concentration of catalyst, with kinetic constants varying from 0.023 1/min (catalyst = 0 g/L) to
0.071 1/min (catalyst = 4 g/L), whereby the optimum dosage of catalyst was found to be 2 g/L. Furthermore, the
catalytic properties of the catalyst remained almost unchanged after 5-time reuse. The results regarding the
biodegradability of the effluent showed that a 5-min reaction time in COP reduced the concentrations of phenol
and COD to the acceptable levels for the efficient post-treatment in the SBR in a 4-h cycle period. Finally, this
combined system is proven to be a technically effective method for treating phenolic contaminants.
