The effect of synthesized Cu2O on the microbial corrosion inhibition of urban sewer systems

  • Zahra Khademmodaresi 1
  • Fereshteh Bakhtiari 2
  • Mohammadmehdi Azizi 3
  • 1 Department of Chemical Engineering, Shiraz University, Shiraz, Iran
  • 2 Department of Chemical Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
  • 3 Department of Chemistry and Biochemistry, the University of Texas at Arlington, USA

Abstract

The microbial corrosion of reinforced concrete sewers was inhibited by synthesized cuprous oxide (Cu2O) nanoparticles. The antibacterial characteristics of Cu2O on Acidithiobacillus thiooxidans were investigated by temporal variation of pH, turbidity, and bacterial counting. Three reinforced concrete samples with different weight percentages of electrodeposited Cu2O (0.06 wt%, 0.055 wt %, 0.05 wt %) were used. The bacterial counting showed that the number of bacteria in samples with 0.06, 0.055, and 0.05 wt% of Cu2O was 4.82, 4.42, and 2.94 times lower than the blank sample (BS), respectively. After bacterial growth, the optical density measurement showed that the percentage of turbidity enhancement for samples with 0.06, 0.055, and 0.05 wt% of Cu2O were 108%, 118%, 165%, respectively, while it was 412% for the BS. Moreover, the pilot stage's pH monitoring revealed that the electrodeposited Cu2O lowered the concentration of hydronium between 7 to 81 times compared to the BS. Experiments indicated that slight changes in the amount of electrodeposited Cu2O lead to significant changes in samples' ability to hinder bacterial growth and microbial-induced corrosion.    

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Keywords: Microbial corrosion, Acidithiobacillus thiooxidans, Concrete sewers, Synthesized cuprous oxide, Nanoparticles
The effect of synthesized Cu2O on the microbial corrosion inhibition of urban concrete sewer systems
Submitted
2021-06-05
Published
2021-06-22
How to Cite
Khademmodaresi, Z., Bakhtiari, F., & Azizi, M. (2021). The effect of synthesized Cu2O on the microbial corrosion inhibition of urban sewer systems. Synthesis and Sintering, 1(2), 92-98. https://doi.org/10.53063/synsint.2021.1233