Statistical Analysis for COD Reduction From Refinery Wastewater By Electro- Photo-Fenton Process Using Titanium And Stainless Steel Electrodes

Document Type : Original Article

Authors

1 College of Petroleum &Mining, Mosul University,Mosul 41002, Iraq

2 College of Engineering – University of Baghdad,Baghdad41001,Iraq

3 Marshes Research Center-University of Thi-Qar

Abstract

Environmental problems at the present time are among the most important challenges facing humans, countries, and regions because of their multiple harms to our planet and everything in it. Among the environmental problems discharging of wastewater in oil, refineries are the largest problem because it contains many harmful pollutants, especially organic pollutants. The case study was to a reduction of the organic pollutants from the wastewater associated with the Qayyarah refinery in Iraq. Samples of the organic pollutants were represented by chemical oxygen demand ( COD ). The technique of merging the electrocoagulation process with Photo-Fenton was applied using a titanium electrode (cathode) and a stainless steel electrode (anode). By applying Takeuchi's method through the Mini Tap program and using statistical methods, we got the results and the final values: The highest COD removal efficiency was 95.238. STANDARD deviation 2.651, (Shapiro-Wilk Statistics efficiency = 0.977, p-Value = 0.813. The optimal conditions for this experiment were as follows: current density= 400 mA cm-2, Sodium sulfate concentration = 3 gm L-1, pH= 6, hydrogen peroxide concentration =400 mg L-1, ferrous sulfate =50 mg L-1, time =40 minute

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Volume 65, Issue 13 - Serial Number 13
Special Issue: Chemistry and Global Challenges
December 2022
  • Receive Date: 29 January 2022
  • Revise Date: 24 March 2022
  • Accept Date: 06 April 2022
  • First Publish Date: 06 April 2022