Magnetic heterogeneous catalytic ozonation: a new removal method for phenol in industrial wastewater

Journal of Environmental Health Science Engineering

Ali Esrafili¹  Mitra Gholami¹  Amir Hossein Mahvi²  Simin Nasseri²  Mahdi Farzadkia¹  Yousef Dadban Shahamat¹ 

[1] Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran;Center for Water Quality Research (CSWR), Institute for Environmental Research and Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran

关键词: Sequencing batch reactor;    Phenol;    Magnetic nano-composite;    Catalytic ozonation;   

Others  :  805468
DOI  :  10.1186/2052-336X-12-50

 received in 2013-09-08, accepted in 2014-02-10,  发布年份 2014

【 摘 要 】

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.

【 授权许可】

   
2014 Shahamat et al.; licensee BioMed Central Ltd.

【 图 表 】

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