Nanoparticles Show Promise in Water Purification

Strategic Insights -

Researchers from King Faisal University in Saudi Arabia have developed a microfilter that uses silver-doped zinc oxide nanoparticles to degrade pollutants in water. The microfilter, made of cotton fabric loaded with Ag@ZnONPs, demonstrated excellent photocatalytic degradation of methylene blue dye molecules under visible light, with degradation efficiencies reaching 100% within 150-180 minutes of irradiation. The filter also exhibited significant antibacterial activity, forming inhibition zones with diameters ranging from 15±0.62 to 19±0.56 mm.

Key Takeaways:

  • The microfilter, made of cotton fabric loaded with Ag@ZnONPs, was shown to be effective in degrading methylene blue dye molecules under visible light, with degradation efficiencies reaching 100% within 150-180 minutes of irradiation.
  • The filter demonstrated significant antibacterial activity, forming inhibition zones with diameters ranging from 15±0.62 to 19±0.56 mm.
  • The biocompatibility and toxicity of the Ag@ZnONPs-loaded CF were assessed, showing no significant toxicity issues and indicating its safe use in environmental applications.
  • The research was supported by the Deanship of Scientific Research, Vice Presidency for Graduate Studies and Scientific Research at King Faisal University, Saudi Arabia.
  • The Ag@ZnONPs were characterized using TEM and DLS analysis, illustrating the formation of nanoparticles with nearly spherical small size (55.91 nm) and PdI (0.630).
  • The SEM analysis revealed the destructive effects of Ag@ZnONPs on the bacterial cells, further supporting its antibacterial efficacy.
  • The research concluded that the Ag@ZnONPs-loaded CF filter has shown great promise as a microfilter for the simultaneous removal of contaminants, degradation of organic dyes, and killing of pathogenic microbes from contaminated water.

The research was published in the journal Fibers and Polymers and the authors include Hany M. Abd El-Lateef, Mohamed Gouda, Mai. M. Khalaf, Manal F. Abou Taleb, and Mahmoud A. Abdelaziz.

Statistics:

  • Degradation efficiency of methylene blue dye molecules under visible light: 100% within 150-180 minutes of irradiation.
  • Inhibition zone diameters of the tested pathogenic bacteria: 15±0.62 to 19±0.56 mm.
  • Size of Ag@ZnONPs: 55.91 nm.
  • Polydispersity index (PdI) of Ag@ZnONPs: 0.630.

Sources:

  • NewsRx. Findings from King Faisal University Has Provided New Data on Nanoparticles (Development of Cotton Fabric Loaded With Ag@znonps As a Promising Reusable Antimicrobial Microfilter for Degrading the Methylene Blue Dye From Highly Polluted Water). Nanotechnology Weekly. June 9, 2025; p 1073.
  • Fibers and Polymers. Development of Cotton Fabric Loaded With Ag@znonps As a Promising Reusable Antimicrobial Microfilter for Degrading the Methylene Blue Dye From Highly Polluted Water. 2025.
  • Springer. Fibers and Polymers. www.springer.com; Fibers and Polymers. www.springerlink.com/content/1229-9197/