Abstract
The feasibility of the application of the Photo-Fenton process in the treatment of aqueous solution contaminated by Tylosin antibiotic was evaluated. The Response Surface Methodology (RSM) based on Central Composite Design (CCD) was used to evaluate and optimize the effect of hydrogen peroxide, ferrous ion concentration and initial pH as independent variables on the total organic carbon (TOC) removal as the response function. The interaction effects and optimal parameters were obtained by using MODDE software. The significance of the independent variables and their interactions was tested by means of analysis of variance (ANOVA) with a 95% confidence level. Results show that the concentration of the ferrous ion and pH were the main parameters affecting TOC removal, while peroxide concentration had a slight effect on the reaction. The optimum operating conditions to achieve maximum TOC removal were determined. The model prediction for maximum TOC removal was compared to the experimental result at optimal operating conditions. A good agreement between the model prediction and experimental results confirms the soundness of the developed model.
Highlights
During the last two decades, an increasing interest has been shown in the ecological effects of pharmaceuticals and personal care products, which are released into the environment every year [1,2].Antibiotics are a special group of pharmaceutical compounds used to control infectious diseases in human and veterinary medicine
Hydrogen peroxide can react with Fe3+ via Equation (6), but the major drawback of as shown in Equation (1), producing hydroxyl radicals that will degrade organic compounds the Fenton reaction is the production of Fe(OH)3 sludge that requires further separation and disposal through Equation (3)
Ferrous ion concentration were selected as factors in the Central Composite Design
Summary
During the last two decades, an increasing interest has been shown in the ecological effects of pharmaceuticals and personal care products, which are released into the environment every year [1,2]. These reactions show that hydrogen peroxide may be consumed when it reacts with Fe2+, as shown in Equation (1), producing hydroxyl radicals that will degrade organic compounds through. Hydrogen peroxide can react with Fe3+ via Equation (6), but the major drawback of as shown in Equation (1), producing hydroxyl radicals that will degrade organic compounds the Fenton reaction is the production of Fe(OH) sludge that requires further separation and disposal through Equation (3). The effect of hydrogen peroxide, ferrous ion concentration, pH and their interactions interactions was evaluated using a Central Composite Design (CCD) combined with RSM.
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