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Characterization of Microplastics by Advanced Analytical Techniques
Summary
Researchers applied advanced analytical techniques — including Raman spectroscopy, synchrotron infrared spectroscopy, transmission electron microscopy, synchrotron X-ray diffraction, and nanoindentation — to characterize the structure and properties of polyolefin microplastics collected from Japanese coastal waters, elucidating mechanisms of formation, photo-oxidative degradation, and fragmentation.
プラスチックは現代社会においてさまざまな用途で使われており，持続可能な社会を形成するための重要な要素である．一方で，環境に誤って放出されたプラスチックが，マイクロプラスチック（MP）やナノプラスチックとなり，土壌，河川，海洋などで環境汚染を引き起こしていることも明らかになっている．本論文では，日本近海で採取したポリオレフィンMPを中心に，それらの構造と物性をラマン分光，放射光赤外吸収分光，透過電子顕微鏡観察，放射光X線回折，ナノインデンテーションなどの先端分析手法により評価し，MPの形成，光酸化による劣化と欠片化の機構を議論した．
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