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拉曼和ATR-FTIR揭示了自然耐候聚烯微塑料中的晶度变化和碳酸盐组和乙烯基组积累

Raihan Anshari¹, Motohiro Tsuboi², Harumi Sato³

¹Department of Applied Chemistry for Environment, Graduate School of Science and Technology, Kwansei Gakuin University, Gakuen-Uegahara, Sanda, Hyogo, 669-1330, Japan.

Scientific reports

|January 20, 2025

概括

来自日本海的自然耐候聚烯 (NWPP) 微塑料显示出显著的降解. 拉曼和FTIR光谱检测显示了结晶性,方向和碳酸盐基团的存在变化,表明了高降解水平.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
聚合物化学聚合物化学

背景情况:

自然耐候聚烯 (NWPP) 提供了超越实验室模拟的降解过程的见解.
微塑料是普遍存在的环境污染物,需要了解它们的降解途径.

研究的目的:

使用光谱方法分析NWPP微塑料的组成,结晶性,方向和降解.
为了研究NWPP由于自然气候变化的化学变化和结构变化.

主要方法:

从日本的海沉积物中提取NWPP样本. 在日本的阿希亚,兵庫.
使用拉曼光谱法进行分析,以评估结晶性和分子方向.
使用减弱总反射-里埃转换红外光谱 (ATR-FTIR) 分析以确定化学变化和功能组.

主要成果:

拉曼光谱揭示了特定频段的强度变化 (1150和842厘米-1),与改变的结晶度和分子方向有关.
ATR-FTIR光谱显示了新的特征,特别是强大的碳酸盐带 (1750-1500厘米−1) 显得比碳酸带更突出.
乙烯基和碳酸基团的存在表明显著的降解,可能受到海水或氧化的影响.

结论:

ATR-FTIR光谱对于监测NWPP降解,特别是碳酸盐群的形成是有效的.
拉曼光谱对于检查NWPP结晶度和分子方向的变化是有价值的.
该研究强调了在海洋环境中发现的NWPP微塑料的高级降解状态.

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