Investigating the kinetics of wastewater treatment contaminated with allyl alcohol inFenton's reaction using the chemical oxygen demand method (COD)

Treatment of industrial effluents with low pollutant concentration is possible only in the presence ofhydroxyl radicals with high activity. Fenton's reaction enables the formation of hydroxyl radicals in wastewaterwith high turbidity. Hydrogen peroxide reacts with pollutants through the two mechanisms of hydroxyl radicaland molecular oxygen. According to the relative contribution of each mechanism, the amount of hydrogenperoxide consumed is determined. In this research, the kinetic formula of the reaction was obtained by theChemical Oxygen Demand method. In the experimental reaction with allyl alcohol, the optimal amount ofhydrogen peroxide used was more than the stoichiometric Ratio. The stepwise increase of hydrogen peroxideand iron salt prevents the recombination of hydroxyl radicals, and therefore the reaction efficiency increases.The highest reaction efficiency was obtained in the ratio of ۱ to ۱۰ iron salt to hydrogen peroxide. The equationof reaction speed and degree of reaction was extracted, and the degree of reaction was equal to ۱.۰۸ comparedto Chemical Oxygen Demand(COD) method.

کلیدواژه ها:

Advanced oxidation ، Fenton process ، Hydroxyl radical ، Chemical oxygen demand (COD)