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Membrane Technologies for Microplastics Removal from Wastewater: Recent Progress, Fouling Mechanisms, and Future Perspectives
Summary
Tiny plastic particles called microplastics are slipping through our wastewater treatment plants and ending up back in the environment—and potentially in our food and water—because standard filtering methods aren't fine enough to catch them. This review paper rounds up the latest research on advanced filter membranes that can trap these particles more effectively, while also tackling a key problem: the membranes tend to get clogged by the plastics they're filtering out. While these technologies aren't yet perfected or widely deployed, they represent a promising step toward cleaner water and reduced human exposure to microplastics, which have been linked to potential health concerns.
Microplastics have recently emerged as a widespread contaminant in wastewater, posing severe risks to the environment and human health due to their potential bioaccumulation and toxicity. Conventional wastewater treatment processes are generally inadequate for the complete removal of microplastics due to their modest scale. Interest has been garnered from academia and industry regarding their separation from wastewater. This review covers recent advances in the application of membrane processes for the removal of microplastics from wastewater. The principles of membrane separation, removal efficiency, and operational challenges are critically evaluated, along with the potential of the hybrid membrane systems. In the next section, the fouling mechanism induced by microplastics and their interaction with foulants, as well as cleaning and anti-fouling strategies, are discussed. Finally, future perspectives focus on the current unresolved research gaps, including the integration of digital monitoring and artificial intelligence-assisted optimization of membrane technology for microplastic removal. By consolidating current knowledge and identifying pathways for innovation, this review underscores the pivotal role of membranes in mitigating plastic pollution and advancing sustainable wastewater management.