Treatment of Wastewater from Oil Refineries by a Combination of Electrocoagulation with Photocatalytic Processes Using Immobilized Nano-Zinc Oxide Photocatalyst

Hameed, Qasem Kadhum; Mohammed, Wadood Taher

doi:10.12911/22998993/192671

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Tytuł artykułu

Treatment of Wastewater from Oil Refineries by a Combination of Electrocoagulation with Photocatalytic Processes Using Immobilized Nano-Zinc Oxide Photocatalyst

Autorzy

Hameed Qasem Kadhum , Mohammed Wadood Taher

Treść / Zawartość

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Identyfikatory

DOI

10.12911/22998993/192671

Warianty tytułu

Języki publikacji

Abstrakty

The present work aimed to reduce the COD of petroleum refinery wastewater using individual and combined processes based on the electrocoagulation and photocatalytic process with immobilized nano-zinc oxide. Also, energy savings alongside performance improvements were evaluated within this conglomerated system. Results showed that the removal efficiency of COD was 72% after 120 min when using electrocoagulation process under the given conditions (15 mA/cm², pH of 7, and flow rate of 0.5 L/min). Regarding the process involving photocatalysis, the removal efficiency of COD was 76% after 120 min under the analyzed conditions (ZnO concentration of 80 g/m², pH of 7, power of irradiation equal to 65 W, and flow rate of 0.5 L/min). Several combined sequential and simultaneous systems were tested. Results confirmed that the simultaneous photo-EC system operated at 30 min is the best one and has the ability to achieve COD removal of 82% under the studied conditions (15 mA/cm², pH of 7, and flow rate of 0.5 L/ min, ZnO concentration of 80 g/m², and 65 W). Furthermore, the further notable features of the combined simultaneous photo-EC system were operating at shorter operation time and lowering dissolution rate of anode electrode (0.2 gram) that makes the system to be the most economic process with an energy consumption of 28.44 kWh/kg COD.

Słowa kluczowe

electrocoagulation nano bio-zinc oxide photocatalytic immobilization wastewater

Wydawca

Polskie Towarzystwo Inżynierii Ekologicznej
Lublin University of Technology

Czasopismo

Journal of Ecological Engineering

Rocznik

2024

Tom

Vol. 25, nr 11

Strony

109--123

Opis fizyczny

Bibliogr. 42 poz., rys., tab.

Twórcy

autor

Hameed Qasem Kadhum

qasem.kadhum2107m@coeng.uobaghdad.edu.iq

Chemical Engineering Department, College of Engineering, University of Baghdad, Baghdad, Iraq

https://orcid.org/0009-0006-5247-3530

autor

Mohammed Wadood Taher

dr.wadood@coeng.uobaghdad.edu.iq

Chemical Engineering Department, College of Engineering, University of Baghdad, Baghdad, Iraq

https://orcid.org/0000-0002-2769-8053

Bibliografia

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