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微塑料从可生物降解和回收材料在人造海水中的微生物降解和加速老化

Leonardo Barlucchi¹, Greta Biale¹, Jacopo La Nasa²

¹Department of Chemistry and Industrial Chemistry, University of Pisa, Pisa, Italy.

The Science of the total environment

|October 11, 2024

概括

微塑料 (MPs) 通过水解降解,释放有害化学品和添加剂到海洋环境中. 本研究分析了可生物降解和回收塑料,以了解它们对环境的影响和降解途径.

科学领域:

环境科学环境科学
聚合物科学聚合物科学
化学工程是化学工程的重要组成部分.

背景情况:

微塑料 (MP) 是所有生态系统中普遍存在的全球污染物.
国会议员的环境退化释放出低分子量产品,添加剂和吸附的污染物.
了解MP降解对于评估它们的环境风险至关重要.

研究的目的:

研究可生物降解 (聚乳酸,Mater-Bi®) 和回收 (回收聚乙烯二甲) 微塑料的形态,化学和热变化.
确定主要降解途径,并在加速老化条件下对释放的物质进行表征.
为了阐明这些塑料在光氧化和热降解过程中的行为.

主要方法:

在合成海水中使用Solarbox系统和黑暗热处理加速老化.
热重力测量分析 (TGA),微分扫描热量测量 (DSC) 和进化气体分析质谱法 (EGA-MS) 用于测量热性能.
减弱总反射 - 里埃变换红外光谱学 (ATR-FTIR) 和热解气色谱 - 质谱学 (Py-GC-MS) 用于化学组成.
气色谱-质谱学 (GC-MS) 用于表征可浸分数和降解产品.

主要成果:

水解被确定为研究聚合物的主要降解途径.
氧化物,降解产品和塑料添加剂在释放的分数中具有特征.
在老化的微塑料中观察到显著的形态,化学和热变化.

结论:

该研究提供了模拟环境条件下的微塑料降解的全面描述.
这些发现有助于更好地了解可生物降解和回收塑料的行为和分解.
这项研究有助于评估微塑料污染对环境的命运和影响.

关键词:

分析性热解是一种分析性热解.生物塑料是生物塑料.质谱测量质量谱测量聚合物的降解降解.气候变化气候变化

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