Novel antifouling nanofiltration PES membranes incorporating with C‐KIT‐6 for heavy metal ions removal

Abstract

The removal of Pb 2+ , Ni 2+ , and Zn 2+ from contaminated water was investigated using the curcumin functionalized KIT-6 (C-KIT-6) incorporated polyethersulfone (PES) nanofiltration (NF) membranes. The prepared C-KIT-6 was characterized by scanning electron microscope (SEM), X-ray powder diffraction (XRD), zeta potential, Energy dispersive X-Ray (EDX), and Fourier-transform infrared spectroscopy (FTIR).EDX mapping, SEM, and FTIR were used to show that C-KIT-6 mixed in the membrane. Zeta potential, mechanical properties, pore radius, pore radius distribution, and overall porosity were also studied to further characterize the prepared membranes. The hydrophilicity of the membranes was determined by the water contact angle and pure water flux study, and it was increased with respect to increasing C-KIT-6 loading. Atomic force microscopy (AFM) images of the C-KIT-6 incorporated membranes represented favorable alterations in surface roughness resulting in the amelioration of antifouling behavior. The maximum flux recovery ratio (FRR) and minimum irreversible permeability decay rate (DR ir ) were attained to be 95.2 and 4.8%, respectively, for the membrane with 0.3 wt% C-KIT-6 (M 2 -C-KIT-6). The rejection of all testing heavy metal ions was maximum (Pb 2+ = 91.4%, Ni 2+ = 93.1% and Zn 2+ = 98.0%) for M 2 -C-KIT-6. Moreover, M 2 -C-KIT-6 showed good long-term reusability performance. The obtained results prove the antifouling C-KIT-6 incorporated PES NF membranes are potential candidates for heavy metal ion removal.

Fabrication of the polyethersulfone/functionalized mesoporous carbon nanocomposite nanofiltration membrane for dyes and heavy metal ions removal: Experimental and quantum mechanical simulation method

“…The WCA was not further decreased when the nanofiller concentration was higher than 0.3 wt% ( M 0.5 membrane). The formation of nanofiller agglomerations can lead to a decrease in the availability of the hydrophilic functional groups on the membrane surface, which could also decrease the surface hydrophilicity of the membrane 22 . The effect of insertion of the F‐CMK‐5 nanofiller at different concentrations on the pure water flux of the fabricated membranes is presented in Figure 11.…”

“…The PWF of the cleaned membrane ( J w,2 ) was measured again at room temperature. The flux recovery ratio (FRR) was obtained as following given 22 : In order to explain the fouling attributes of the membranes in more detail, different fouling resistance ratios were calculated using the following equations: where R ir , R r , and R t refer to the irreversible, reversible, and total fouling resistances, respectively.…”

“…The formation of nanofiller agglomerations can lead to a decrease in the availability of the hydrophilic functional groups on the membrane surface, which could also decrease the surface hydrophilicity of the membrane. 22 The effect of insertion of the F-CMK-5 nanofiller at different concentrations on the pure water flux of the fabricated membranes is presented in Figure 11. The pure water flux of the nanocomposite membranes was higher than that of M 0 , which was probably due to a more hydrophilic surface.…”

New Hybrid Nanofiltration Membranes with Enhanced Flux and Separation Performances Based on Polyphenylene Ether-Ether-Sulfone/Polyacrylonitrile/SBA-15

“…The literature on ultrafiltration and nanofiltration membranes strongly suggests that the most widely-used polymers are polysulfone (PS), polyethersulfone (PES), polyacrylonitrile (PAN), polypropylene (PP), polytetrafluoroethylene (PTFE), polyamide (PA), and cellulose acetate (CA) [ 9 , 10 , 11 , 12 , 13 ].…”