Treatment of wastewater containing hard degradable pollutants through the advanced oxidation process (ozonation)

Authors

1 Faculty of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran

2 Faculty of Earth Sciences Engineering, Arak University of Technology, Arak, Iran

Abstract

Chlorophenols are persistent organic pollutants which have long life expectancy, low decomposability, and hurtful characterizations in the environment. Ozonation is one of the powerful Advanced Oxidation Processes (AOPs) for removing pollution. In this research Chlorophenol removal with the ozonation process has been discussed. According to the physical modeling of the process, a mathematical model of the removal rate has been presented using Response Surface Methodology (RSM). Independent variables of this research are 4-chlorophenol concentration, O3 concentration, and pH. On the other hand, dependent variables is: 4-chlorophenol removal percentage. . This study was done in batch reactor, which a certain amount of water contaminated with pollutants was placed in it. Also, in this research, the effect of each of the independent variables, the simultaneous effect of the independent variables on the dependent variable, and the effect of the independent variables on each other have also been evaluated. According to the experimental model, it was observed that the most optimal conditions for pollutant removal were obtained at 4-CP concentration of 35 mg/liter, pH of 11, O3 concentration of 5 g/H, and time of 30 minutes. It was 93.52% removal rate. However, according to the results, the effect of the parameters of the tests in different conditions was investigated.

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Journal of Civil and Environmental Engineering

Articles in Press, Accepted Manuscript
Available Online from 25 January 2023

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