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The Use of Polymers in the Flotation Treatment of Wastewater
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This review covers how polymers (polyelectrolytes) are used in flotation-based wastewater treatment to remove suspended solids and organic matter. The findings are relevant to how plastics interact with water treatment processes.
The use of flotation for the treatment of wastewaters in general, but especially for the removal of oil, grease, general organic matter, and suspended solids, is well established as a low energy process. Polyelectrolytes (PEs) can enhance performance without adding to the solids load that occurs with inorganic additives such as alum. The bridging of pollutants and the attachment of the resulting aggregates to the air-water interface can be effectively carried out with most wastewaters. Hydrophobic modification of the PEs can be useful for difficult species. It should be applied to the flotation of polyfluoroalkyl substances, for example, as they are not amenable to economical conventional treatment. Similarly, the removal of microplastic particles from sewage effluents by flotation could be enhanced.
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Removal of Micro/Nano-Plastics from Water by Flotation Technology: A Review
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This review covers flotation technology as a method for removing micro- and nanoplastics from water, explaining how dissolved air flotation, electroflotation, and froth flotation work to separate plastic particles. The authors assess performance data across particle sizes and polymer types and identify remaining challenges for scaling these approaches.
Model analysis of electroflotation water treatment of wastewater containing microplastics
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This study developed a mathematical model describing how electroflotation can remove microplastics from wastewater, identifying key factors affecting efficiency. Better process models help optimize treatment systems for removing plastic particles before they enter waterways.
Is froth flotation a potential scheme for microplastics removal? Analysis on flotation kinetics and surface characteristics
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This study evaluated froth flotation as a method for removing microplastics from water, finding that surface hydrophobicity governs flotation efficiency and that the technique shows promise as a scalable treatment option for certain polymer types.
Research Trends in Flotation of Waste-plastics and Its Use as Functional Materials
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This review covers research trends in using flotation separation to sort and recycle mixed waste plastics. Researchers found that flotation is an effective physical method for separating polymers by type, enabling more efficient recycling and recovery of valuable plastic raw materials. The review also covers emerging approaches for upcycling recycled polymers into functional materials.
Removal of microplastics from wastewater through electrocoagulation-electroflotation and membrane filtration processes
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Researchers investigated electrocoagulation-electroflotation and membrane filtration for removing microplastics from wastewater, finding that combining these processes effectively recovers microplastic particles from treatment plant effluent.
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