Fabrication and characterization of PES based nanofiltration membrane using bio-inspired iron (III)-dopamine nanoparticles

This paper presents a study on the modification of nanofiltration membranes with bio-inspired iron (III)-dopamine nanoparticles in a polymer solution. The membranes were produced using the immersion precipitation technique with the incorporation of dopamine, polyvinyl pyrrolidone, and dimethylacetamide. The study evaluated the properties of the nanocomposite membranes, including water content, surface morphology, and their performance was characterized through SEM, contact angle goniometry, pure water flux, and rejection of NaCl and humic acid. The findings revealed that membranes containing 0.1 wt.% bio-inspired iron (III)-dopamine nanoparticles exhibited the best overall performance, with enhanced hydrophilicity, anti-fouling properties, and salt rejection efficiency. This optimal concentration also minimized fouling and improved the flux recovery ratio compared to other concentrations, highlighting its potential for water treatment applications