Effect of MWCNTs on the Performance of Mixed-Matrix Membranes in Removing Cerium Ions from Aqueous Feed Solutions
Publication: Journal of Environmental Engineering
Volume 144, Issue 3
Abstract
This study investigates the effect of multiwalled carbon nanotubes (MWCNTs) on the performance of polyethersulfone membranes in cerium ion removal from aqueous solution. Neat polyethersulfone (PES) membrane and mixed-matrix membranes (MMMs) containing MWCNTs are fabricated by the wet phase inversion technique. The MWCNTs are functionalized by (3-aminopropyl)-trimethoxysilane (APTMS) to improve their adhesion to the polymeric matrix. The MWCNTs (before and after functionalization) are analyzed using Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, and thermogravimetric analysis (TGA). Morphological properties of the fabricated membranes are evaluated by scanning electron microscopy (SEM) and field emission scanning electron microscopy (FESEM) methods. Fabricated membranes are subjected to further experiments in order to evaluate cerium ion removal efficiency. Permeation test results show that permeate flux and cerium (Ce) ion rejection increase as MWCNT content increases in the polymer matrix. The results also show that permeate flux and cerium ion rejection increase as operating pressure and feed flow rate increase while inversely decreased by increasing the cerium ion concentration in the feed solution. Application of ethylenediaminetetraacetic acid disodium (EDTA) drastically increases cerium ion rejection.
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Acknowledgments
The authors acknowledge the University of Tehran’s financial support.
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Published In
Journal of Environmental Engineering
Volume 144 • Issue 3 • March 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Dec 22, 2016
Accepted: Sep 11, 2017
Published online: Jan 6, 2018
Published in print: Mar 1, 2018
Discussion open until: Jun 6, 2018
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