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. 2023 Nov 12;15(22):4388.
doi: 10.3390/polym15224388.

Development of Novel PET-PAN Electrospun Nanocomposite Membrane Embedded with Layered Double Hydroxides Hybrid for Efficient Wastewater Treatment

Abdul Majeed Pirzada  1 , Imran Ali  1 , Nabi Bakhsh Mallah  2 , Ghulamullah Maitlo  3
Affiliations

Development of Novel PET-PAN Electrospun Nanocomposite Membrane Embedded with Layered Double Hydroxides Hybrid for Efficient Wastewater Treatment

Abdul Majeed Pirzada et al. Polymers (Basel). .

Abstract

Layered double hydroxides (LDHs) with their unique structural chemistry create opportunities to be modified with polymers, making different nanocomposites. In the current research, a novel PET-PAN embedded with Mg-AI-LDH-PVA nanocomposite membrane was fabricated through electrospinning. SEM, EDX, FTIR, XRD, and AFM were carried out to investigate the structure and morphology of the nanocomposite membrane. The characterization of the optimized nanocomposite membrane showed a beadless, smooth structure with a nanofiber diameter of 695 nm. The water contact angle and tensile strength were 16° and 1.4 Mpa, respectively, showing an increase in the hydrophilicity and stability of the nanocomposite membrane by the addition of Mg-Al-LDH-PVA. To evaluate the adsorption performance of the nanocomposite membrane, operating parameters were achieved for Cr(VI) and methyl orange at pH 2.0 and pH 4.0, respectively, including contact time, adsorbate dose, and pollutant concentration. The adsorption data of the nanocomposite membrane showed the removal of 68% and 80% for Cr(VI) and methyl orange, respectively. The process of adsorption followed a Langmuir isotherm model that fit well and pseudo-2nd order kinetics with R2 values of 0.97 and 0.99, respectively. The recycling results showed the membrane's stability for up to five cycles. The developed membrane can be used for efficient removal of pollutants from wastewater.

Keywords: adsorption; electrospinning; layered double hydroxides; nanocomposite membrane; wastewater treatment.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Schematic diagram of electrospinning setup with adsorption experiment.
Figure 2
Figure 2
The SEM images and nanofiber diameter histograms of: (a,f) PP, (b,g) PPLH1, (c,h) PPLH2, and (d,i) PPLH3 membranes, and (e) SEM image of Mg-Al-LDH.
Figure 2
Figure 2
The SEM images and nanofiber diameter histograms of: (a,f) PP, (b,g) PPLH1, (c,h) PPLH2, and (d,i) PPLH3 membranes, and (e) SEM image of Mg-Al-LDH.
Figure 3
Figure 3
EDX spectrum of: (a) PP, (b) PPLH1, (c) PPLH2, (d) PPLH3, and (e) Mg-Al-LDH.
Figure 3
Figure 3
EDX spectrum of: (a) PP, (b) PPLH1, (c) PPLH2, (d) PPLH3, and (e) Mg-Al-LDH.
Figure 4
Figure 4
FTIR spectra for PP and PPLH3 membranes.
Figure 5
Figure 5
AFM results of: PP membrane (a) 2D and (b) 3D images; and PPLH3 membrane: (c) 2D and (d) 3D images.
Figure 6
Figure 6
XRD patterns of PP and PPLH3 membranes.
Figure 7
Figure 7
Water contact angles of (a) PP and (b) PPLH3 membranes.
Figure 8
Figure 8
Basic adsorption experiment results for removal of (a) MO and (b) Cr(VI).
Figure 9
Figure 9
Effect of (a) pH, (b) contact time, (c) concentration, and (d) adsorbent dosage on MO adsorption using PPLH3 membrane.
Figure 10
Figure 10
The (a) Langmuir and (b) Freundlich isotherm models for MO adsorption. (c) pseudo-1st order and (d) pseudo-2nd order kinetic curves of MO adsorption.
Figure 10
Figure 10
The (a) Langmuir and (b) Freundlich isotherm models for MO adsorption. (c) pseudo-1st order and (d) pseudo-2nd order kinetic curves of MO adsorption.
Figure 11
Figure 11
Stress–strain curve of PP and PPLH3 membranes.
Figure 12
Figure 12
Recyclability test of PPLH3 membrane for MO adsorption.
Figure 13
Figure 13
Proposed adsorption mechanism of MO and Cr(VI) using PPLH3 membrane.
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