Superhydrophobic nanocarbon-based membrane with antibacterial characteristics

Area of Science:

• Materials Science
• Environmental Engineering
• Biotechnology

Background:

• Biofouling poses a significant challenge in membrane water treatment, reducing efficiency and lifespan.
• Antimicrobial strategies are crucial for mitigating biofouling and ensuring effective water purification.

Purpose of the Study:

• To develop and optimize a novel antimicrobial membrane using superhydrophobic carbon nanomaterials impregnated on powder activated carbon (CNMs/PAC).
• To investigate the impact of composite membrane fabrication parameters on Staphylococcus aureus growth.
• To evaluate the antibiofouling potential of the developed CNMs/PAC membranes.

Main Methods:

• Systematic design of experiments was employed to optimize composite membrane fabrication parameters.
• The antimicrobial efficacy was assessed by monitoring Staphylococcus aureus growth using spectrophotometry and Scanning Electron Microscopy (SEM).
• The influence of carbon nanomaterials' hydrophobicity on bacterial colonies was analyzed.

Main Results:

• Increasing hydrophobicity of CNMs/PAC significantly decreased Staphylococcus aureus abundance and altered bacterial structure.
• Optimum fabrication conditions were identified: 363.04 mg carbon loading, 22.64 g/100 g polymer concentration, and 133.91 μm casting knife thickness.
• These optimized conditions reduced bacterial colonies to approximately 7.56 CFU, demonstrating potent antibacterial activity.

Conclusions:

• The developed CNMs/PAC composite membranes exhibit strong antibacterial properties against Staphylococcus aureus.
• The superhydrophobic nature of CNMs/PAC contributes to the observed antimicrobial and antibiofouling effects.
• These findings highlight the potential of CNMs/PAC for advanced membrane water treatment applications to combat biofouling.