Can advanced MXene-based membranes offer a sustainable solution for per- and poly-fluoroalkyl substances (PFAS)...

Per- and poly-fluoroalkyl substances (PFAS) can cause detrimental ecological and health impacts in water. Exploring cutting-edge water purification strategies to address this concern is essential for fostering sustainable global progress and ensuring a future for humanity. This work examines the potential of MXene-based membranes for removing PFAS in water. It discusses the unique properties of MXene materials, and key removal mechanisms, such as size exclusion, electrostatic interactions, adsorption, and nanoconfinement effect, which contribute to effective PFAS removal, are also investigated. These findings demonstrate the potential of MXene-based membranes for practical applications in addressing environmental issues related to emerging pollutant contamination. The MXene-carbon nanotube (CNT) membrane achieved over 91 % elimination of perfluorooctanoic acid (PFOA), demonstrating its potential applicability for effective PFAS removal. MXenes present an innovative alternative to traditional materials, creating novel opportunities for leading-edge and environmentally sustainable water solutions. With the incorporation of MXenes in commercial membrane applications, these materials offer advanced separation performance, increased durability, and boosted fouling resistance. Challenges, including membrane stability, fouling, and scalability, are highlighted alongside potential solutions that could contribute to developing MXene-based membrane technologies. Finally, prospects focus on advancements in MXene modifications and real-world applications for sustainable water treatment in support of the Sustainable Development Goals (SDGs). By supporting SDG 6 ("Clean water and sanitation") and SDG 14 ("Life below water") and impacting SDG 3 ("Good health and well-being") and SDG 12 ("Responsible consumption and production"), membrane-based solutions address the gap between research and industry in MXene-powered water purification. The outcomes of this research are meaningful for policymakers, environmental specialists, and educators as we collaboratively pursue a more responsible future.