Application of a Ti₃C₂T_X MXene-Coated Membrane for Removal of Selected Natural Organic Matter and Pharmaceuticals

Abstract

Ti3C2T X 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 Ti3C2T X 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 Ti3C2T X 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 Ti3C2T X MXene coating. Additionally, the reusability of the Ti3C2T X 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 Ti3C2T X -coated membrane can be engineered to effectively treat various organic contaminants with high water permeability, retention performance, and antifouling capability.

Surface-Encapsulated Bismuth Molybdate-Layered Silicate Hybrids as Sorbents for Photocatalytic Filtration Membranes

“…22,23 end. Recent studies aimed toward decontaminating water polluted with atomic and molecular species have explored materials ranging from 2D systems like g-C 3 N 4 24 and MXenes 25 to carbon organic frameworks (COFs) 26 and metal organic frameworks (MOFs) 27 and have investigated their efficacy in a filtration setup. For instance, Ren et al used Fe-based MOFs (MIL-53(Fe)) in combination with polyvinyidene fluoride (PVDF) to fabricate a water filtration membrane and tested it by filtering dye-contaminated water, going on to show that the addition of H 2 O 2 further improves methylene blue (MB) removal due to the catalytic activity of MIL-53(Fe).…”

“…Filtration and reverse osmosis by polymer-based membranes represent one of the most thoroughly investigated material systems for water decontamination, mainly because of their high removal efficiency of small organic molecule, salt rejection, and high permeation flux. , Many different inorganic materials are now being explored toward the same end. Recent studies aimed toward decontaminating water polluted with atomic and molecular species have explored materials ranging from 2D systems like g-C 3 N 4 and MXenes to carbon organic frameworks (COFs) and metal organic frameworks (MOFs) and have investigated their efficacy in a filtration setup. For instance, Ren et al used Fe-based MOFs (MIL-53­(Fe)) in combination with polyvinyidene fluoride (PVDF) to fabricate a water filtration membrane and tested it by filtering dye-contaminated water, going on to show that the addition of H 2 O 2 further improves methylene blue (MB) removal due to the catalytic activity of MIL-53­(Fe) .…”

Layer-by-Layer-Assembled Loose Nanofiltration Membrane for Persulfate Activity Enhancement: Performance and Process Regulation

“…3 Therefore, developing an efficacious and stable technology or process for the removal of organic micropollutants is highly in demand and an ongoing pursuit. 4 Advanced oxidation processes (AOPs) capable of rapid production of reactive oxygen species (ROS) are considered as preeminent methods in view of their high micropollutant degradation efficiency. 5 Recently, hydroxyl ( • OH) and sulfate (SO 4…”

“…Besides, another challenge for the operation and processing of sewage treatment plants is that sewage discharge standards are becoming increasingly stringent . Therefore, developing an efficacious and stable technology or process for the removal of organic micropollutants is highly in demand and an ongoing pursuit …”

ZnOS+C adsorbent for the effective removal of Fast Green dye from synthetic and real wastewater

“…Industrial and municipal wastewater disposal without proper treatment into the environment causes contamination of pure water resources, which further leads to a number of health and environmental problems [1]. The contaminants present in the wastewater may include synthetic dyes [2], heavy metals [3], pesticides [4], pharmaceuticals [5], phenolic species [6], and veterinary products [7]. The wastewater produced from textile industries contains a variety of dyes.…”