IJE TRANSACTIONS B: Applications Vol. 30, No. 11 (November 2017) 1639-1646   

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R. Davarnejad, K. Zangene, A. R. Fazlali and R. Behfar
( Received: March 17, 2017 – Accepted in Revised Form: September 08, 2017 )

Abstract    The aim of this research was to evaluate the effective parameters such as pH, current density (mA/cm2), H2O2/Fe2+ molar ratio, volume ratio of H2O2 to pharmaceutical wastewater (PhW) (ml/l) and reaction time (min) on the electro-Fenton process for the ibuprofen (as a pharmaceutical waste in water) removal. Since a synthetic wastewater with the same concentration of ibuprofen in a real pharmaceutical wastewater (400 ppm) was chosen in this research, the sample was tested in terms of the chemical oxygen demand (COD). The parameters were statistically optimized under response surface mythology (RSM). The software was also applied to minimize the number of runs. The optimum conditions for 98.290% COD removal were at pH of 2.43, current density of 23.08 mA/cm2, H2O2/Fe2+ molar ratio of 2.69, volume ratio of H2O2/PhW of 1.84 ml/l and reaction time of 28.08 min.


Keywords    COD, Electro-Fenton, Pharmaceutical wastewater, Treatment


چکیده    هدف از انجام این پژوهش بررسی پنج پارامتر در فرایند الکتروفنتون در حذف بروفن از یک پساب دارویی است. این پارامترها pH ، چگالی جریان، نسبت مولیH2O2/Fe2+ و نسبت حجمی H2O2/PhW (ml/l) و زمان واکنش هستند. در این تحقیق یک پساب سنتزی دست­ساخت با همان غلظت ایبوبروفن در پساب واقعی ppm)400( انتخاب شد. نمونه­ها بر اساس نیاز به اکسیژن شیمیایی (COD ) آزمایش شدند. پارامترها تحت روش سطح پاسخ (RSM) بهینه­سازی شدند. استفاده از این روش تعداد آزمایش­ها را به حداقل ‌رساند. شرایط بهینه برای حذف 29/98٪ COD در آزمایشگاه تحت شرایط pH 43/2، چگالی جریان mA/cm2 08/23، نسبت مولی H2O2/Fe2+ 69/2، نسبت حجمی H2O2/PhW(ml/l)84/1 و زمان واکنش 08/28 دقیقه به دست آمد.


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