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Microplastics elutriation system
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This study developed and tested an improved elutriation system for extracting microplastics from sediment samples, using numerical modeling to optimize the column design and extraction protocol. The result is a more efficient tool for isolating microplastics in environmental research that can help improve consistency across studies.
Elutriation is an efficient process for extracting microplastics. The development of a numerical model has shown the need for optimizing aspects of the design of the actual elutriation protocol as well as the dimensioning of the column to increase its efficiency. The study aims to propose new dimensioning data and protocol elements for designing an efficient column. Using a numerical model, the filling velocity was calculated as a function of the size and the density of the particles to prevent sand suspension. The sieving protocol was adapted to increase the density limit for the extraction of plastic particles from 1460 to >1800 kg·m. The durations of the elutriation and the column height were calculated to improve the control of the particle suspension. These results contribute to the development of the next generation of elutriation system and will accelerate the study of plasticome in the context of sandy sediments.
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Microplastics elutriation system. Part A: Numerical modeling
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This study developed a numerical model to calculate the exact flow velocities needed to extract microplastics of different sizes and densities from sediment using elutriation. The model enables more precise and efficient laboratory extraction of microplastics from complex sediment samples.
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Researchers optimized an elutriation device — which uses upward water flow to separate particles by density — achieving high microplastic recovery rates from sediment by adjusting flow rate and column diameter. The optimized device provides a practical, low-cost tool for extracting microplastics from environmental sediment samples in research and monitoring programs.
Microplastics elutriation from sandy sediments: A granulometric approach
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This study optimized elutriation — a water-flow technique for separating particles by size — to more efficiently extract microplastics from sandy sediments while minimizing carry-over of sand. The granulometric (particle-size-based) approach improved extraction yields and provides a practical low-cost tool for environmental microplastic monitoring.
Viability of elutriation for the extraction of microplastics from environmental soil samples
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Researchers evaluated whether elutriation, a technique previously used for marine sediments, could effectively extract microplastics from freshwater and terrestrial soils. Testing across five different soil types in Oklahoma, they found that elutriation achieved substantial sample mass reduction without losing microplastic particles. The study demonstrates that elutriation is a viable and efficient preprocessing step for extracting microplastics from diverse soil types.
An optimized density-based approach for extracting microplastics from soil and sediment samples
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.