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:: Volume 17, Issue 3 (Scientific Journal of Kurdistan University of Medical Sciences 2012) ::
SJKU 2012, 17(3): 72-81 Back to browse issues page
Assessment of the efficiency of electro-Fenton process in degradation of formaldehyde from a highly concentrated aqueous solution by aluminum and iron electrodes
Amir Bagheri 1, Gholamreza Moussavi Dr * 2, Ali Khavanin Dr3
1- Tarbiat Modares University, Tehran
2- Associate Professor Tarbiat Modares University, Tehran , moussavi@modares.ac.ir
3- Associate Professor Tarbiat Modares University, Tehran
Abstract:   (10062 Views)
ABSTRACT Background and Aim: Due to its high reactivity, colorlessness, stability, purity in different commercial forms and low price, formaldehyde is increasingly used in industries. According to the CERCLA list, formaldehyde is toxic and dangerous to the humans and environment. The aim of this study was to investigate the efficiency of electro-Fenton process for pretreatment of industrial wastewater containing high concentrations of formaldehyde. Material and Methods: This was an experimental laboratory study. First of all a reactor was designed and built. Then optimal reaction time was determined and kept constant to determine optimal pH. Finding optimal pH and reaction time, the influence of initial hydrogen peroxide concentration and arrangement of iron and aluminum electrodes as anode and cathode material in constant density, with 1 L/min aeration was investigated for treatment of synthetic wastewater containing initial concentration of 7500 mg/L of formaldehyde. MS Excel 2010 and relative standard deviation were used for data analysis and interpretation. Results: Our findings demonstrated that the increase of pH and initial hydrogen peroxide concentration resulted in an increase of formaldehyde removal by Electro-Fenton Process. Increasing the reaction time up to 10 min resulted in an increase in formaldehyde removal, but increase of the reaction time more than 10 min led to a decrease in formaldehyde removal by the above mentioned process. Use of iron as anode and cathode electrodes led to more removal of formaldehyde in comparison to other possible arrangements between iron and aluminum. Conclusion: The results indicated that the maximum formaldehyde removal was 71.54 percent which was achieved at operational conditions of pH=10, current intensity of 8.5 mA/cm2, primary H2O2 concentration of 50 mM/L after 10 minutes by using iron for anode and cathode electrodes. Keywords: Industrial wastewater, Formaldehyde, Electro-Fenton, Iron electrode, Aluminum electrode Received: Oct 7, 2011 Accepted: Jun 12, 2012
Keywords: Industrial wastewater, Formaldehyde, Electro-Fenton, Iron electrode, Aluminum electrode
Full-Text [PDF 459 kb]   (1816 Downloads)    
Type of Study: Research | Subject: General
Received: 2012/09/25
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Volume 17, Issue 3 (Scientific Journal of Kurdistan University of Medical Sciences 2012) Back to browse issues page
مجله علمی دانشگاه علوم پزشکی کردستان Scientific Journal of Kurdistan University of Medical Sciences
مجله علمی دانشگاه علوم پزشکی کردستان Scientific Journal of Kurdistan University of Medical Sciences
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