• • The SNFM achieves 928% greater permeance and 92% bisphenol A rejection, with 89% Na2SO4 rejection, outperforming commercial nanofiltration membranes while maintaining low fouling (protein adsorption ≤12 μg cm−2) over 30 days, demonstrating that green materials do not compromise separation efficiency.
• • The membrane's carbon footprint is reduced by 62% compared to petrochemical-based membranes, as confirmed by life cycle assessment, offering a quantifiable environmental benefit for industrial adoption under carbon-neutral regulations.
• • Soil biodegradation tests confirm 90% breakdown within 6 months, driven by Delftia and Tissierella microbes that hydrolyze PLA and oxidize the selective layer, eliminating microplastic pollution at end-of-life—a critical advantage over nonbiodegradable polyamide membranes.
• • The use of low-hazard, renewable components (PLA, xylitol, dopamine, and oleic acid) and green solvents (dimethyl sulfoxide) avoids toxic aromatic monomers and volatile organic compound emissions, addressing occupational health and environmental safety concerns in membrane manufacturing.