Combining Electro Fenton With Adsorption Processes for Treatment of Petroleum Refinery Wastewater

Ali N. Kassob; Ali H. Abbar; Abdullah Y. Ghjeer; Zaid H. Jabbar; Zainab T. Al‐Sharify

doi:10.1002/wer.70185

journal article Oct 01, 2025

Combining Electro Fenton With Adsorption Processes for Treatment of Petroleum Refinery Wastewater

Ali N. Kassob Ali H. Abbar

Abdullah Y. Ghjeer

Zaid H. Jabbar

Zainab T. Al‐Sharify

Water Environment Research Vol. 97 No. 10 · Wiley

View at Publisher Save 10.1002/wer.70185

Abstract

ABSTRACT

This study investigates the elimination of chemical oxygen demand (COD) from an Iraqi petroleum refinery effluent through a combined electro‐Fenton and adsorption process (EF+AC). Response surface methodology (RSM) with a Box–Behnken design (BBD) was employed to investigate the effects of FeSO
4
concentration, current density, and electrolysis time on the reduction of COD using the EF technique. According to the results of the analysis of variance (ANOVA) for the EF technique, FeSO
4
concentrations, with a contribution of 40.06%, and current density, with a contribution of 46.35%, exert a considerable influence. The optimum conditions for COD elimination rate (99.06%) and energy consumption (9.805 kWh/kg COD) were achieved using an electrolysis time of 85.12 min, a current density of 25 mA/cm
2
, and a concentration of 1.335 mM FeSO
4
. For the EF+AC process, a central composite design (CCD) was used to determine the influence of the packing level of activated carbon (AC) and the time on the reduction of COD at a constant current density of 5 mA/cm
2
and FeSO
4
concentration of 0.2 mM. The packing level of AC significantly influenced the elimination of COD, with time being the subsequent factor. The results showed that the optimal conditions led to a 98.77% removal of COD, requiring 0.91 kWh/kg COD. This efficiency and energy consumption were attained by using 92% packed AC and allowing the process to run for 85 min. EF+AC was found to have lower energy consumption and a smaller quantity of ferrous sulfate compared to EF. Notably, the current system offers a promising vision by combining the benefits of adsorption and electro‐Fenton for wastewater remediation.

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Details

Published: Oct 01, 2025
Vol/Issue: 97(10)
License: View

Authors

A

Ali N. Kassob

Chemical Engineering Department College of Engineering, University of Al‐Qadisiyah Al‐Diwaniyah Iraq

A

Ali H. Abbar

Department of Biochemical Engineering Al‐Khwarizmi College of Engineering, University of Baghdad Baghdad Iraq

A

Abdullah Y. Ghjeer

Chemical Engineering Department College of Engineering, University of Al‐Qadisiyah Al‐Diwaniyah Iraq

Z

Zaid H. Jabbar

Civil Engineering Department College of Engineering, University of Al‐Qadisiyah Al‐Qadisiyah, Al‐Diwaniyah Iraq

Z

Zainab T. Al‐Sharify

Department of Oil and Gas Refining Engineering Al Hikma University College Baghdad Iraq; School of Chemical Engineering University of Birmingham Birmingham UK; Department of Environmental Engineering, College of Engineering Mustansiriyah University Baghdad Iraq

Cite This Article

Ali N. Kassob, Ali H. Abbar, Abdullah Y. Ghjeer, et al. (2025). Combining Electro Fenton With Adsorption Processes for Treatment of Petroleum Refinery Wastewater. Water Environment Research, 97(10). https://doi.org/10.1002/wer.70185

Combining Electro Fenton With Adsorption Processes for Treatment of Petroleum Refinery Wastewater

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