[Research Progress on Removal of Microplastics by Filtration in Drinking Water Treatment].

Microplastics （MPs）， as an emerging contaminant， have garnered significant attention in the field of drinking water research because of their widespread distribution in the environment and potential for biological toxicity. Currently， varying levels of MPs have been detected in drinking water treatment plants （DWTPs）， and media filtration， as a key barrier in the effluent of DWTPs， offers advantages such as easy scalability， low operating costs， green and sustainable purification， and potential for improved removal efficiency of MPs. Moreover， plastic particles can be effectively removed through mechanisms such as screening， filtration， interception， adsorption， size exclusion， cake formation， and electrostatic attraction/repulsion. Therefore， to obtain a comprehensive understanding of the efficacy of media filtration in removing MPs in DWTPs， a thorough investigation of the sources and current status of MPs in DWTPs was initially conducted， an in-depth analysis of the contribution of media filtration in removing MPs was performed， and a brief overview of the mechanisms of media filtration removal of MPs was presented. Additionally， a comprehensive evaluation of the various factors affecting the effectiveness of media filtration in removing MPs was conducted. The results indicate that wastewater treatment plants （WWTPs） are a significant source of MPs in surface and groundwater， that media filtration is notably effective in removing MPs larger than 10 μm， and that its effectiveness is limited for MPs smaller than 10 μm. The efficiency of media filtration in removing MPs is influenced by the properties of the MPs themselves， the nature of the filter media， and the hydraulic and aqueous chemical properties. Finally， future research directions were prospected from several perspectives， including the quantification and analysis methods of MPs， the development and optimization of efficient media filtration technologies for small-sized MPs， and the impact of micro-interface behavior during media filtration on the migration and removal mechanisms of MPs， with the goal of providing a theoretical foundation and technical reference for optimizing media filtration processes to remove MPs.