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Extraction of Microplastics from River Water in a Rotating Coiled Column Using a Water–Oil System
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Researchers demonstrated for the first time the use of a rotating coiled column with a water-oil system to continuously separate microplastics from river water samples. After separation, pyrolysis GC-MS was used to confirm polymer identity in extracted particles from Moscow River water, establishing proof of concept for this novel analytical approach.
Abstract Determination of the microplastics content of natural waters is an important task in assessing the degree of water body pollution, identifying pollution sources, and evaluating potential risks for aquatic ecosystem inhabitants and water consumers. Solving this problem primarily falls within the realm of analytical chemistry, with separation methods for particles playing a crucial role. This work for the first time presents a potential application of the method of continuous-flow microplastic separation in a rotating coiled column using a water–oil system for assessing the microplastics content in river water. Microplastics in the extracted particle samples were determined by pyrolytic gas chromatography with mass spectrometric detection (pyro-GC–MS). A water sample from the Moskva River was analyzed. Using a water–castor oil system, 1.8 mg/L of suspended particles were extracted from the river water. A procedure for the digestion of the organic matter of the sample (30% H 2 O 2 ) reduced the mass of the extracted particles to 0.4 mg/L. The residual fraction was analyzed by optical microscopy. According to the pyro-GC–MS data, the total microplastics content in the test water sample was 109 µg/L, accounting for 1.4% of the total suspended particle content of the sample. Five types of microplastics were identified: polyethylene, polypropylene, acrylonitrile butadiene styrene, acryl–butadiene rubber, and polyethylene terephthalate, with polyethylene being the predominant type (97 µg/L). The proposed method offers promise for assessing the microplastics content in natural waters.
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Scientists are developing a new way to filter out microplastics using a spinning device with water and oil, similar to methods already used to separate chemicals. While this technology is still in the theoretical and modeling stage, it could eventually lead to better tools for detecting and removing microplastics from water — an important step since we're still learning how these tiny plastic particles affect our bodies when we ingest them through food and water.
Erratum to: Extraction of Microplastics from River Water in a Rotating Coiled Column Using a Water–Oil System
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This is a published correction (erratum) to an earlier paper on a method for extracting microplastics from river water using a rotating coiled column system. It does not contain new scientific findings but corrects errors in the original publication.
Continuous-Flow Extraction of Microplastics in a Centrifugal Extractor Using a Water–Oil System
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Scientists have developed a fast, efficient method to pull microplastic particles out of water by spinning it together with oil in a specialized device—similar to how oil and water separate, but sped up and controlled. The technique captured 98% of microplastic particles, which is promising news for improving how we detect and remove these tiny pollutants from our water supply before they end up in what we drink. While this study focused on the extraction technology itself rather than health effects, better detection tools are a key step toward understanding and reducing our exposure to microplastics.
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