Removal of p-nitrophenol from aqueous environments by UV/S2O82- process in a continuous photoreactor: Optimization by Taguchi method
Subject Areas : Laboratory and field studies on remediation/reduction of environmental pollution through emerging techniques
1 - Department of Applied Chemistry, Faculty of Chemistry, Semnan University, Semnan, Iran
Keywords: Continuous annular photoreactor, p-nitrophenol, Taguchi method, UV/S2O82-,
Abstract :
The present research was an attempt to investigate the removal of an organic pollutant called p-nitrophenol (PNP) using the UV/S2O82- process in a continuous annular photoreactor in order to optimize the operating conditions effective in the efficiency of the process through the Taguchi method. According to the results of the Taguchi method, the optimal conditions for initial concentration of PNP was equal to 40 mg L-1 with pH equal to 3 and S2O82- concentration equal to 18 mM in a residence time of 17.24 min. In such conditions, the removal percentage is equal to 98%, which is in good agreement with its experimental value of 95%. Furthermore, the Taguchi method showed that the most effective parameter in the removal of PNP was the concentration of S2O82- with a contribution of 43%.
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