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Height Distribution Measurement of Environmental Particulate Matter at Setsunan University Neyagawa Campus Using Scanning Electron Microscopy — Microplastics and Asian Dust
Original title: 走査型電子顕微鏡を用いた 摂南大学寝屋川キャンパスにおける環境微粒子の高さ分布計測 ― マイクロプラスチック，黄砂 ー
Summary
This study measured height distribution of microplastics and yellow sand particles at Setsunan University's Neyagawa campus using scanning electron microscopy, finding that microplastic density was highest near roads and decreased exponentially with height. Larger particles (>20 µm) were only found below 20 m, while yellow sand fell uniformly across the campus, leading to recommendations for strategic placement of air purifiers in specific building floors.
Using a scanning electron microscope (SEM), we measured the height distribution of environmental particles (microplastics and yellow sand) at the Neyagawa campus of Setsunan University. Microplastics were denser in the area facing the road, and the density decreased exponentially and rapidly with height. Larger particles were more abundant at lower elevations, especially those larger than 20μm, which only increased to a height of about 20m. Yellow sand was found to fall uniformly over the entire campus, and the density increased exponentially and gradually with height. Based on these findings, we suggest installing air purifiers in rooms on the lower floors from the first to the fifth floor facing the street, and in rooms on the upper floors above the seventh floor.