Cetyl trimethyl ammonium bromide-modified magnetic biochar-integrated sand filter for microplastics removal from secondary-treated sewage effluents: Performance evaluation and mechanistic insights

Mechanistic Understanding of Microplastic Removal by Biochar and Sand Filtration System under Variable Hydraulic Loading

Spent Coffee Ground Biochar for enhanced removal of very small microplastics (1-5 μm) from polluted water: a quaternary treatment approach

Removal of microplastics from water by using magnetic sedimentation

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"Researchers demonstrated that magnetic Fe-C-NH2 nanoparticles added to water can attach to polyethylene and PET microplastics, forming heteroaggregates that are then removed by a gradient magnetic field, achieving effective extraction of both plastic types from model aqueous suspensions. This green magnetic sedimentation approach offers a scalable, chemical-free pathway for removing microplastics from drinking water or wastewater effluent, with direct implications for reducing human ingestion of plastic particles."

Effects of Sand Filters in Wastewater Treatment Plants on Microplastic Output

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Sand filters in wastewater treatment plants reduced the mass of microplastics in effluent but increased the count of smaller particles, suggesting filtration fragments larger pieces rather than eliminating microplastics entirely. This finding indicates that conventional sand filtration is insufficient for microplastic removal and may inadvertently increase the release of smaller, potentially more bioavailable particles into freshwater streams.

Enhanced removal of microplastics from wastewater treatment plants by a novel magnetic filter

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This study developed a novel magnetic adsorption approach to enhance microplastic removal in wastewater treatment plant effluents, achieving high removal efficiency across a range of particle sizes and polymer types.