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Cellulose acetate based Complexation-NF membranes for the removal of Pb(II) from waste water

Authors
  • Idress, H.1
  • Zaidi, S. Z. J.2
  • Sabir, A.1
  • Shafiq, M.1
  • Khan, R. U.1
  • Harito, C.3
  • Hassan, S.4
  • Walsh, F. C.4
  • 1 University of the Punjab, Lahore, 54590, Pakistan , Lahore (Pakistan)
  • 2 University of the Punjab, Lahore, Pakistan , Lahore (Pakistan)
  • 3 Bina Nusantara University, Jakarta, 11480, Indonesia , Jakarta (Indonesia)
  • 4 University of Southampton, Highfield, Southampton, SO17 1BJ, UK , Southampton (United Kingdom)
Type
Published Article
Journal
Scientific Reports
Publisher
Springer Nature
Publication Date
Jan 19, 2021
Volume
11
Issue
1
Identifiers
DOI: 10.1038/s41598-020-80384-0
Source
Springer Nature
License
Green

Abstract

This study investigates the removal of Pb(II) using polymer matrix membranes, cellulose acetate/vinyl triethoxysilane modified graphene oxide and gum Arabic (GuA) membranes. These complexation-NF membranes were successfully synthesized via dissolution casting method for better transport phenomenon. The varied concentrations of GuA were induced in the polymer matrix membrane. The prepared membranes M-GuA2–M-GuA10 were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, atomic force microscope and bio-fouling studies. Thermal stability of the membranes was determined by thermogravimetric analysis under nitrogen atmosphere. Dead end nanofiltration was carried out to study the perm- selectivity of all the membranes under varied pressure and concentration of Pb(NO3)2. The complexation-NF membrane performances were significantly improved after the addition of GuA in the polymer matrix membrane system. M-GuA8 membrane showed optimum result of permeation flux 8.6 l m−2 h−1. Rejection of Pb(II) ions was observed to be around 97.6% at pH 9 for all the membranes due to electrostatic interaction between CA and Gum Arabic. Moreover, with the passage of time, the rate of adsorption was also increased up to 15.7 mg g−1 until steady state was attained. Gum Arabic modified CA membranes can open up new possibilities in enhancing the permeability, hydrophilicity and anti-fouling properties.

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