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土壤中可生物降解塑料薄膜的降解:微塑料的形成和土壤微生物社区的动态

Yue Wang¹, Run-Hao Bai¹, Qi Liu¹

¹Key Laboratory of Prevention and Control of Residual Pollution in Agricultural Film, Ministry of Agriculture and Rural Affairs, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing 100081, China.

Journal of hazardous materials

|April 14, 2025

概括

可生物降解的聚乙烯基合甲基 (PBAT) 微塑料最初在土壤中增加,然后减少. 菌碎片PBAT,而细菌降解它,提供了关于微塑料命运的见解.

科学领域:

环境科学环境科学
微生物学微生物学
聚合物科学聚合物科学

背景情况:

人们对可生物降解塑料,如聚乙烯基酸盐-联合甲酸盐 (PBAT) 的微塑料释放存在担忧.
了解PBAT微塑料的环境命运和微生物相互作用对于风险评估至关重要.

研究的目的:

在180天内调查土壤中PBAT微塑料的时间变化.
确定土壤细菌和真菌在PBAT微塑料形成和降解中的作用.

主要方法:

在土壤中化PBAT塑料薄膜180天.
监测PBAT微塑料的演变 (大小,形状,数量).
分析土壤细菌和真菌社区的动态和功能.

主要成果:

在180天内,PBAT微塑料达到峰值,然后下降74.7%,主要尺寸小于10微米.
观察到三个阶段:初始释放 (0-30天),临界释放 (60-120天) 和临界降解 (150-180天).
(Humicola, Schizothecium) 促进了PBAT的碎片化,而细菌 (Verrucomicrobiota) 降解了PBAT作为碳来源.

结论:

土壤微生物群落显著影响PBAT微塑料的动态.
菌活动有助于微塑料的形成,而细菌活动驱动降解.
这些发现为加速土壤中可生物降解微塑料降解的战略提供了基础.

关键词:

可生物降解的微塑料微塑料的形成和降解.聚 (丁烯基酸盐-联合甲酸盐)土壤细菌是土壤中的细菌.土壤中的真菌.

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