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Analysis of Marine Microplastics for Assessing Pollution in Aquatic Environments
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This research analyzed marine microplastics collected from a specific location to assess the extent and nature of plastic pollution, using methods such as visual sorting and spectroscopic identification. The work contributes baseline data needed to monitor trends in marine plastic contamination over time.
Microplastics in environments is an important class of plastic litter that has attracted great attention as emerging pollutants in recent years. In this study, we conducted a preliminary field survey in aquatic environments. The identification and analysis of drifting microplastics residue in surface seawater collected from urban areas were performed. Drifting samples were taken from three stations in Tokyo Bay, using a plankton net. At first, samples on grass fiber filters were visually sorted to pick up substances supposed to be microplastics. The substances were then analyzed by FT-IR to identify the polymer of microplastics (polyethylene (PE), polypropylene (PP), and (polystyrene) propylene (PS)). As results, microplastics were found at all studied stations with the total number of 414 particles, which suggest that they ubiquitously distribute in aquatic environments. Secondary microplastics were frequently detected in samples. In addition, the size distributions of microplastic particles showed that relatively small sizes of particles (0.5–1 mm) were very abundant (51.4 %) compared to lager particles. These results suggest that the fragmentation of large plastic litter in environments is an important source of microplastic. As for the polymer composition microplastic, PE was predominantly detected, accounting for 60.1 % of the identified microplastics, followed by PP (27.3 %) and PS (12.6 %). The results in this study imply needs for investigating the environmental fates of microplastic particles as well as pollutants accumulated on drifting microplastics.
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This review covered the methods used to identify and characterize microplastics in marine environmental samples, evaluating the strengths and limitations of visual, spectroscopic, and chemical approaches for field and laboratory analysis.
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This review provides a systematic protocol for identifying and quantifying microplastics in water environments, covering sampling, extraction, and analytical techniques. Researchers evaluate the strengths and limitations of methods including visual sorting, spectroscopic analysis, and thermal techniques for characterizing microplastic pollution. The study emphasizes the urgent need for standardized methodologies to enable meaningful comparisons across different microplastic research studies.
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This review evaluates the various methods used to identify and characterize microplastics in water environments, from visual sorting to advanced spectroscopy and thermal analysis techniques. Researchers compared the strengths and limitations of each approach, noting that no single method can fully capture the diversity of microplastic pollution. The study recommends combining multiple analytical techniques and standardizing protocols to improve the reliability of microplastic monitoring worldwide.
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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.