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Download fileApplication of a Ti3C2TX MXene-Coated Membrane for Removal of Selected Natural Organic Matter and Pharmaceuticals
journal contribution
posted on 2021-09-10, 07:15 authored by Sewoon Kim, Farivash Gholamirad, Bora Shin, Nader Taheri-Qazvini, Jinwoo Cho, Miao Yu, Chang Min Park, Jiyong Heo, Yeomin YoonTi3C2TX MXene
was used for surface modification of membranes by vacuum-assisted
filtration. Owing to its higher hydrophilicity, negatively charged
surface, and lower molecular weight cutoff, the Ti3C2TX MXene-coated membrane showed
great performance for the treatment of organic contaminants. Humic
acid (HA)/tannic acid mixtures were selected as the target natural
organic matter (NOM). Owing to weakened hydrophobic interaction and
improved size exclusion upon using Ti3C2TX MXene, it was difficult for HA to pass through
the membrane. Membrane performance was tested for two different charged
pharmaceuticals (amitriptyline and ibuprofen) under three pH conditions.
The water permeabilities of pure water and both pharmaceuticals showed
similar trends. This indicates that separation is affected by electrostatic
interactions because the membrane surface is more negatively charged
after Ti3C2TX MXene
coating. Additionally, the reusability of the Ti3C2TX MXene-coated membrane was evaluated
in three filtration cycles for NOM. After the first and second cleanings,
recoveries of water permeabilities were 95.5% and 91.6% for HA. Although
NOM can act as a foulant, HA caused reversible fouling. These findings
indicate that the Ti3C2TX-coated membrane can be engineered to effectively treat
various organic contaminants with high water permeability, retention
performance, and antifouling capability.
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weakened hydrophobic interactionthree ph conditionsthree filtration cycleshigh water permeability3 sub2 sub>- coated membranenegatively charged surfacenegatively chargedx coated membraneassisted filtrationwater permeabilitiessurface modificationpure watermembrane surfacesub ><> sub>< subsecond cleaningsretention performanceorganic contaminantsmembrane performancehumic acidhigher hydrophilicityfindings indicateelectrostatic interactionsantifouling capability