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Effect of dope flow rate and post-treatment on the morphology, permeation and metal ion rejection from PES/LiBr-based UF hollow fiber membranes

Muhammad Irfan, Muhammad Irfan and Irfan, Masooma and Idris, Ani and Alsubaie, Abdullah Saad and Mahmoud, Khaled Hussein and Mohd. Yusof, Noordin and Muhammad, Nawshad (2022) Effect of dope flow rate and post-treatment on the morphology, permeation and metal ion rejection from PES/LiBr-based UF hollow fiber membranes. Membranes, 12 (3). pp. 1-14. ISSN 2077-0375

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Official URL: http://dx.doi.org/10.3390/membranes12030305

Abstract

This study investigated the influence of dope extrusion rate (DER) and post-treatment effect on the morphology, permeation, and metal ion rejection by polyethersulfone/lithium bromide (PES/LiBr)-based hollow fiber (HF) membranes. HF fibers were spun with 2.25, 2.5, and 3.1 ratios of DER to bore fluid rate (BFR), wherein DER varied from 11.35, 12.5, to 15.6 mL/min with a fixed BFR (5 mL/min). Molecular weight cutoff (MWCO), pore size, water flux, and flux recovery ratio were determined, whereas lake water was used to observe the rejection rate of dissolved metallic ions. Results showed that with the increase of the DER wall thickness (WT), HFs increased from 401.5 to 419.5 um, and furthermore by the post-treatments up to 548.2 um, as confirmed by field emission scanning electron microscope (FESEM) analysis. Moreover, MWCO, pore size, and the pure water permeation (PWP) of the HF membranes decreased, while the separation performance for polyethylene glycol (PEG) solute increased with increasing DER. Post-treated HFs from 11.35 mL/min of DER showed 93.8% of MWCO value with up to 90% and 70% rejection of the arsenic and chromium metallic ions, respectively, in comparison with all other formulated HFs.

Item Type:Article
Uncontrolled Keywords:dope extrusion, hollow fiber, lake water, PES, salt
Subjects:Q Science > QC Physics
Q Science > QD Chemistry
Divisions:Chemical and Energy Engineering
ID Code:103168
Deposited By: Yanti Mohd Shah
Deposited On:20 Oct 2023 02:05
Last Modified:20 Oct 2023 02:05

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