在土壤中模拟塑料薄膜微塑料的时间演变,使用反向传播神经网络
Runhao Bai1, Wei Wang1, Jixiao Cui2
1Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Journal of hazardous materials
|November 5, 2024
概括
可生物降解 (PBAT) 和聚乙烯 (PE) 微塑料在土壤中发生不同的变化. 陈旧的PBAT微塑料在数量和尺寸上显示出最显著的变化,为塑料薄膜的命运提供了洞察力.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 聚合物科学 聚合物科学
背景情况:
- 塑料薄膜在中国农业中至关重要,但对农田微塑料污染作出了重大贡献.
- 对于在土壤中聚乙烯 (PE) 和聚乙烯基基合甲基 (PBAT) 微塑料的环境演变和命运的了解有限.
研究的目的:
- 调查土壤化期间新和老PE和PBAT微塑料的时间演变特征.
- 为了比较PE和PBAT微塑料在土壤环境中的降解模式.
主要方法:
- 使用准备好的PE和PBAT微塑料进行了受控的土壤化实验.
- 收集了形态和光谱数据,以分析微塑料丰富度,大小和形状的变化.
- 开发了一种反向传播神经网络模型,以确定化时间.
主要成果:
- 与PE微塑料相比,PBAT微塑料在数量,尺寸和形状上随着时间的推移表现出更显著的变化.
- 经过衰老的PBAT微塑料显示出最初的增加,其次是丰富度的减少,持续的尺寸减少到分别为初始值的21.9%和47.5%.
- 开发的神经网络模型在识别微塑料化时间方面取得了高准确性 (98.1%的PE,84.6%的PBAT).
结论:
- 该研究揭示了PE和PBAT微塑料在土壤中的独特环境行为和降解率.
- 这些发现为评估农业塑料薄膜中微塑料的持久性和命运提供了一种新的方法.
- 了解这些微塑料的动态对于减轻土壤污染和环境风险至关重要.
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