High flux membrane based on in-situ formation of zirconia layer coated the polyethersulfone substrate for ions separation

• Published in: Water science & technology. Water supply Vol. 21; no. 7; pp. 3344 - 3355
• Main Authors: Worou, Chabi Noël, Kang, Jing, Alamou, Eric A., Degan, Arcadius, Yan, Pengwei, Gong, Yingxu, Guene, Razack L., Chen, Zhonglin
• Format: Journal Article
• Language: English
• Published: London IWA Publishing 01-11-2021
• Subjects: Bicarbonates; Dopamine; Ferries; Ions; ions rejection; Membrane separation; Membranes; Microscopy; Nanofiltration; nanoparticle; Nanoparticles; Nanotechnology; organic-inorganic membrane; polyethersulfone; Polyethersulfones; Pore size; Rejection rate; Separation; Sodium; Sodium bicarbonate; Substrates; Thin films; Ultrafiltration; Zirconia; Zirconium; Zirconium dioxide; China
• ISSN: 1606-9749; 1607-0798
• DOI: 10.2166/ws.2021.092

Abstract
A flawless, extremely loose, membrane, efficient for multivalent ions separation, has been successfully synthesized by the in-situ formation approach. The as-synthesized nanofiltration (NF) membrane, NF_PES-Zr, proceeded from a thin film layer of nanoparticles (NPs) zirconium that coated the platform of the polyethersulfone (PES) ultrafiltration (UF) membrane through a bio-glue made from dopamine hydrochloric and sodium bicarbonate buffer. The estimation of the average pore size of the novel organic-inorganic NF membrane NF_PES-Zr using the filtration velocity approach of Guerout-Elford-Ferry was close to 0.9 nm. NF_PES-Zr membrane holds a record in permeate water flux release of about 62.5 and was revealed to be effective for multivalent ions separation. A 5 days-test performed on NF_PES-Zr demonstrated its long-term stability and showed a rejection rate of 93.4% and 37.8% respectively for and .