Synthesis, characterization, and performance analysis of carbon molecular sieve-embedded polyethersulfone mixed-matrix membranes for the removal of dissolved ions

Danial Qadir, Rizwan Nasir, Hilmi B. Mukhtar, Lau Kok Keong

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The asymmetric polyethersulfone (PES-15 wt.%) mixed-matrix membranes were prepared by incorporation of carbon molecular sieve (CMS) with varying concentrations (1, 3, and 5 wt.%). Physicochemical characterization of synthesized membranes was carried out using field emission scanning electron microscope, atomic force microscopy, contact angle, thermogravimetric analysis, zeta potential analyzer, porosity, and mean pore sizes. Performance analysis of synthesized mixed-matrix membranes was carried out by varying the operating parameters such as pressure (2–10 bar), feed concentration (100–1,000 mg/L), and cations type (Na+, Ca2+, Mg2+, and Sn2+). Effect of operating parameters and CMS concentration was investigated on pure water flux (PWF), permeate flux, and rejection of membranes. It was found that mixed-matrix membrane containing 15 wt.% PES with 1 wt.% CMS displayed the superior physicochemical characteristics in terms of hydrophilicity (37.9°), surface charge (−13.8 mV), mean pore diameter (6.04 nm), and thermal properties (Tg = 218.5°C), and overall performance. E5C1 membrane showed 1.5 times higher PWF (75.5 L m−2 hr−1) and incremented in rejection for all salts than the nascent membrane.
    Original languageEnglish
    Pages (from-to)306–1324
    JournalWater Environment Research
    Volume92
    Issue number9
    DOIs
    Publication statusPublished - 5 Apr 2020

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