We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Papers
61,005 resultsShowing papers similar to Density-Based Characterization of Microplastics via Cross-Halbach Magnetic Levitation
ClearA 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.
Bidimensional Dynamic Magnetic Levitation: Sequential Separation of Microplastics by Density and Size
Researchers developed a two-dimensional dynamic magnetic levitation technique that simultaneously separates microplastics by both material density and particle size in a single step. The 2D-MagLev method addresses a key gap in microplastic sample preparation by resolving mixtures of plastics that differ in both polymer type and particle dimensions.
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.
Magnetism-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.
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.
An Environmentally Friendly Method for the Identification of Microplastics Using Density Analysis
This study developed an inexpensive, eco-friendly method for identifying microplastic polymer types using only safe liquids (water, ethanol, and salt solutions) for density-based separation. The approach is field-portable and avoids the hazardous chemicals used in current methods, making microplastic monitoring more accessible.
Laboratory Designed Portable Device for Density Separation and Characterization of Microplastics in Environmental Soil Samples
Scientists designed a small, portable device for extracting microplastics from soil and sediment samples using a density separation method with different salt solutions, successfully isolating PET, LDPE, PVC, and PP from samples collected in school yards, lakesides, and agricultural fields. A portable, low-cost device lowers the barrier to field-based microplastic monitoring and could enable wider participation in pollution surveys.
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.
Optimized microplastic analysis based on size fractionation, density separation and μ-FTIR
Researchers optimized a multi-step method for extracting and identifying microplastics from soil and sediment, combining grain size separation, density flotation, and infrared microscopy. The validated method achieved high recovery rates for eight common plastic polymers, contributing to more reliable monitoring of soil microplastic contamination.
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 simple method for the extraction and identification of light density microplastics from soil
This study developed and validated a simple method for extracting and identifying low-density microplastics from sediment samples, offering a practical and cost-effective approach for environmental monitoring.
Sorting microplastics from other materials in water samples by ultra-high-definition imaging
Researchers used a commercial particle analyzer with ultra-high-definition imaging to sort and identify microplastic particles in water samples. The device successfully distinguished between different plastic types based on how light scatters through or off their surfaces, and could separate microplastics from air bubbles and other non-plastic particles. The study demonstrates a relatively fast and accessible method for characterizing microplastic contamination in water.
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.
Microplastic extraction from sediments established? – A critical evaluation from a trace recovery experiment with a custom-made density separator
Scientists evaluated the accuracy of a custom density separator for extracting small microplastic particles from sediment, finding variable recovery rates across different polymer types. Standardized and validated extraction methods are essential for accurate measurements of microplastic contamination in sediment environments.
Separation of microplastics from deep-sea sediment using an affordable, simple to use, and easily accessible density separation device
Researchers developed an affordable, simple, and accessible density separation device for extracting microplastics from deep-sea sediment, addressing the lack of accuracy and reproducibility in existing extraction methods. The study included spike-recovery experiments as positive controls to validate extraction performance across different sediment matrices.
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.
Fluorescence polarimetry for microplastics identification
Researchers developed a novel fluorescence polarimetry approach using anisotropy measurements to identify and characterize microplastics, offering a faster and simpler alternative to conventional spectroscopy and chromatography methods that require complex sample preparation.
A new small device made of glass for separating microplastics from marine and freshwater sediments
Researchers developed a new compact glass device for extracting microplastics from marine and freshwater sediments via density separation, addressing shortcomings of existing apparatus such as poor recovery rates and time inefficiency.
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.
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.
Extraction and concentration of nanoplastic particles from aqueous suspensions using functionalized magnetic nanoparticles and a magnetic flow cell
Researchers developed a method using hydrophobic magnetic nanoparticles to capture and concentrate nanoplastics — plastic particles smaller than 1 micrometer — from water samples, achieving recovery rates of 57–85% across different water types including freshwater and seawater. This technique addresses a major gap in nanoplastic research by making it possible to detect and measure these nearly invisible particles in real environmental samples.
Analytical methods used in microplastics identification: A review
This review examines the range of analytical methods used to identify microplastics in environmental samples, evaluating the strengths and limitations of techniques including visual inspection, spectroscopy, and chromatography for accurate microplastic characterization.
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.