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Papers
61,005 resultsShowing papers similar to Bidimensional Dynamic Magnetic Levitation: Sequential Separation of Microplastics by Density and Size
ClearMagnetism-Assisted Density Gradient Separation of Microplastics
Researchers developed a magnetism-assisted density gradient separation method using a specialized cell connected to a gradient pump and positioned between opposing neodymium magnets, through which increasing MnCl2 concentration gradients sequentially suspend and collect different microplastic types by density for efficient separation from complex particle mixtures.
Density-Based Characterization of Microplastics via Cross-Halbach Magnetic Levitation
Researchers developed a Cross-Halbach magnetic levitation device to characterise microplastics by density, successfully levitating common plastic samples varying in size and concentration and recording levitation times within 180 seconds. Characterised density values validated against theoretical data demonstrated that magnetic levitation provides a robust, accessible method for identifying microplastic types without the need for spectroscopic instrumentation.
Radial Magnetic Levitation and Its Application to Density Measurement, Separation, and Detection of Microplastics
Researchers developed a new radial magnetic levitation (MagLev) device using ring magnets that doubles the working distance compared to standard designs, enabling more accurate density-based measurement and separation of materials. The study demonstrates the system's direct application to detecting and sorting microplastic particles by density, offering a rapid, chemical-free method for identifying different polymer types in environmental samples. This technology could become a practical tool for field and laboratory microplastic analysis, helping researchers and regulators better quantify plastic contamination.
Biphasic Magnetic Levitation to Detect Organic Pollutants on Microplastics
Researchers developed a biphasic magnetic levitation system for detecting organic pollutants sorbed onto microplastics, using a paramagnetic aqueous donor phase containing mixed microplastics alongside a diamagnetic organic acceptor phase. Position-dependent trapping of microplastics in a magnetic field enabled density-based separation and quantification of co-occurring organic contaminants.
A Magnetic Levitation System for Range/Sensitivity-Tunable Measurement of Density
Researchers developed a magnetic levitation (MagLev) system capable of measuring the density of small objects across a tunable range of sensitivity. The system can identify materials by their density, which has applications for sorting and identifying microplastics by polymer type. A versatile density-measurement tool could streamline microplastic characterization in environmental samples.
Multidimensional Separation by Magnetic Seeded Filtration: Experimental Studies
Not directly relevant to microplastics — this study investigates magnetic seeded filtration as a multidimensional separation technique for particles based on size and surface charge.
Non-Destructive Extraction and Separation of Nano- and Microplastics from Environmental Samples by Density Gradient Ultracentrifugation
Researchers developed a non-destructive method using density gradient ultracentrifugation to extract and separate different types of nano- and microplastics from environmental samples. The study demonstrates that this approach can effectively separate various plastic polymer types from complex environmental matrices based on their density differences, offering a promising new tool for microplastic analysis.
Density-Based Multi-Stage Flotation Sorting of Microplastics in Beach Sand
Researchers developed a density-based multi-stage flotation sorting method for separating microplastics from beach sand, achieving high separation efficiency across multiple polymer types with different densities using sequential salt solutions of increasing concentration.
A new approach in separating microplastics from environmental samples based on their electrostatic behavior
Researchers developed a novel electrostatic separation method to isolate microplastics from environmental matrices based on differences in electrostatic behavior between plastic particles and natural materials. The technique offers a low-cost, chemical-free approach to microplastic extraction that could complement or replace existing density separation methods in some applications.
Validation of density separation for the rapid recovery of microplastics from sediment
Researchers validated a density separation method for rapidly recovering microplastics from sediment samples, confirming it as a reliable and efficient approach for routine environmental monitoring.
Enhanced density separation efficiency of microplastics in presence of nonionic surfactants
Scientists improved the density-separation technique for sorting mixed microplastics by adding nonionic surfactants, boosting the purity of separated polymer types from as low as 69% to up to 96%. Better sorting methods are essential for both accurately measuring microplastic contamination and enabling recycling of plastic waste streams.
Not all microplastics are created equal. Quantifying efficacy bias and validation of density separation methods
Researchers evaluated and validated density separation methods for extracting microplastics from environmental matrices, quantifying efficacy bias across different polymer types with varying densities. They found that recovery rates differ substantially depending on polymer density relative to the separation solution, introducing systematic bias in microplastic concentration estimates across studies.
A novel approach to extract, purify, and fractionate microplastics from environmental matrices by isopycnic ultracentrifugation
Researchers developed a novel isopycnic ultracentrifugation method for simultaneously extracting and fractionating microplastics from complex environmental matrices such as soil, demonstrating that diffusion-based density gradients enable separation of mixed polymer types according to their specific buoyant densities, overcoming limitations of conventional saturated salt density extraction.
Rapid extraction of high- and low-density microplastics from soil using high-gradient magnetic separation
High-gradient magnetic separation was developed as a method to extract both high- and low-density microplastics from soil, overcoming the limitation of conventional density-based separation that often misses heavier plastic types. The approach improved overall microplastic recovery and offers a more complete picture of soil contamination.
Comparison between two methods for microplastic separation from sandy sediments
Researchers compared two density-based methods for separating microplastics from sandy sediments, evaluating their performance on beach sand and mangrove soil samples. The study assessed the advantages and disadvantages of each approach to identify the most suitable method for large-scale in-situ monitoring programs.
An optimized density-based approach for extracting microplastics from soil and sediment samples
Researchers optimized a density-based extraction method for isolating microplastics from soil and sediment samples, testing different density solutions and separation steps to maximize recovery efficiency. The improved protocol reduces contamination risks and particle loss, enabling more accurate quantification of microplastics in terrestrial and freshwater sediment matrices.
Controlling Small Particles for Two-Step Density Sorting of Simulated Microplastics: Overcoming Surface Tension Effects with Surfactants
Researchers developed a two-step density-based floatation sorting protocol for separating simulated microplastics from sediment samples, addressing the challenge of surface tension effects that cause particles to float regardless of density. By applying surfactants to overcome surface tension, the method provides a lower-cost alternative to infrared spectrometry for estimating the ratio of floating to sinking microplastics in environmental samples.
Microplastic Collection With Ultra-High Magnetic Field Magnet by Magnetic Separation
Ultra-high magnetic field magnets were evaluated for collecting microplastics from ocean water through magnetic separation, offering a high-throughput processing approach that could complement existing microplastic cleanup technologies targeting the SDG goal of reducing ocean pollution.
A novel, highly efficient method for the separation and quantification of plastic particles in sediments of aquatic environments
Researchers improved a density separation method for isolating microplastics from aquatic sediments, achieving higher recovery rates and reducing processing time compared to earlier approaches. The validated method was designed to be reproducible and cost-effective, addressing the need for reliable standardized protocols in microplastic monitoring.
Study on Harnessing Ferrofluid Technology for Efficient Microplastic Extraction from Ocean Water and Optimization of Manufacturing Materials
Researchers developed a ferrofluid-based method for extracting microplastics from ocean water, using magnetic attraction to selectively capture plastic particles mixed with ferrofluid. The technique offers a novel, efficient approach for ocean microplastic remediation and sample collection.
Recent Advances on Density Separation Techniques for Microplastic Recovery from Sediments
This review summarises recent advances in density separation techniques for extracting microplastics from sediments, evaluating the effectiveness of different salt solutions and comparing novel approaches such as electrostatic separation and pressurised fluid extraction against conventional methods.
Comparison of Different Procedures for Separating Microplastics from Sediments
Researchers compared three different methodologies for separating dense microplastics from fine sediments, finding significant differences in recovery rates and identifying contamination risks during the separation procedures.
Enhanced microplastic removal using a mini-hydrocyclone with microbubbles
Researchers improved microplastic separation from water by combining mini-hydrocyclones with microbubble injection, finding that the microbubbles reduced apparent microplastic density and substantially improved separation efficiency for particles with densities similar to water.
Hydrophobicity–water/air–based enrichment cell for microplastics analysis within environmental samples: A proof of concept
Researchers developed a new microplastic separation device that uses the hydrophobic properties of plastic particles combined with fine air bubbles to quickly and effectively extract microplastics from sediment and soil samples. The new method avoids harsh solvents that can degrade microplastic particles and offers a faster alternative to existing separation techniques.