Membrane Surface Modification via In Situ Grafting of GO/Pt Nanoparticles for Nitrate Removal with Anti-Biofouling Properties

Abstract

Nanofiltration processes for the removal of emerging contaminants such as nitrate are a focus of attention of research works as an efficient technique for providing drinking water for people. Polysulfone (PSF) nanofiltration membranes containing graphene oxide (GO)/Pt (0, 0.25, 0.5, 0.75, 1 wt%) nanoparticles were generated with the phase inversion pathway. The as-synthesized samples were characterized by FTIR, SEM, AFM, and contact angle tests to study the effect of GO/Pt on hydrophilicity and antibacterial characteristics. The results conveyed that insertion of GO/Pt dramatically improved the biofouling resistance of the membranes. Permeation experiments indicated that PSF membrane embracing 0.75 wt% GO/Pt nanoparticles had the highest nitrate flux and rejection ability. The membrane’s configuration was simulated using OPEN-MX simulating software indicating membranes maintaining 0.75 wt% of GO/Pt nanoparticles revealed the highest stability, which is well in accordance with experimental outcomes.

Performance evaluation of polyethersulfone membranes modified with poly (acrylic acid‐co‐N‐vinyl pyrrolidone) grafted mesoporous carbon nitride for effective removal of cadmium(II) from wastewater

“…After that, the rejection efficiency slightly declined until it reached 78.0% for M 5 and 79.3% for M 10 membranes. This observation can be attributed to the probable lack of accessible active sites for efficient interaction with cadmium ions, the occupation of adsorption sites, and the clogging of membrane pores which could be the significant factors of the reduction in Cd 2+ ion rejection for nano‐additive contents of higher than 1 wt% 62,63 . Figure 10 represents the Cd 2+ ion rejection as a function of time in both M 2 and M 7 membrane samples.…”

“…This observation can be attributed to the probable lack of accessible active sites for efficient interaction with cadmium ions, the occupation of adsorption sites, and the clogging of membrane pores which could be the significant factors of the reduction in Cd 2+ ion rejection for nanoadditive contents of higher than 1 wt%. 62,63 F I G U R E 1 1 Fouling resistance ratios of (A) poly (AA-co-VP)γ-MPS@MCN)/PES and (B) poly (AA-co-VP)@APTES@MCN/PES membranes in comparison to PES membrane.…”

Designing Versatile Superhydrophilic Structures via an Alginate-Based Hydrophilic Plasticene

“…In general, the microgroove structure of a superhydrophilic surface is able to generate the capillary force for rapid liquid delivery, and the nanoscale surface roughness can trap liquid molecules for lowering the hysteresis of liquid motion. Differing with the superior water repellency of superhydrophobic interfaces, superhydrophilic surfaces show promising functions such as liquid pumping [ 28 , 29 , 30 ], anti-fouling [ 31 , 32 , 33 ], directional floatability [ 34 ], etc.…”

A review of current developments in graphene oxide–polysulfone derived membranes for water remediation

“…Fig.8 (a and b) Side view and top view of the optimized position of Ptnanoparticles on the surface of GO, and (c) optimized nitrate-interaction with the GO/Pt surface and bond lengths (Å) 199. …”