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了解传统和可生物降解的微塑料对不同土壤聚合物的有机碳分解的影响

Jiaxin Wang¹, Minghua Song², Mengnan Lu³

¹College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China.

Environmental pollution (Barking, Essex : 1987)

|August 16, 2024

概括

像聚烯 (PP) 和聚乳酸 (PLA) 这样的微塑料改变了土壤的碳循环和微生物群落. 这些塑料颗粒显著影响土壤有机碳和二氧化碳排放,特别是在土壤聚合物中.

科学领域:

环境科学环境科学
土壤科学土壤科学
生态毒理学生态毒理学

背景情况:

土壤的生态功能,包括碳循环和结构,受到微塑料的影响.
微塑料对土壤碳转化和微生物群落在总体规模的影响机制尚不清楚.

研究的目的:

研究聚烯 (PP) 和聚乳酸 (PLA) 微塑料对土壤碳转化的影响和机制.
分析不同土壤聚合物大小 (宏聚合物,微聚合物,泥土和粘土) 的这些影响.

主要方法:

在土壤聚合物中对碳转化 (二氧化碳排放,土壤有机碳,溶解的有机碳) 的实验分析.
评估微塑料 (PP和PLA) 对土壤微生物群落,功能基因和酶活动的影响.
对不同微塑料类型,含量和土壤聚合物大小的影响进行比较.

主要成果:

无论是PP还是PLA都促进了二氧化碳排放,其影响因微塑料类型,含量和聚合物大小而异.
在宏观聚合物中,PP降低了土壤有机碳 (SOC) 和溶解有机碳 (DOC),而PLA在所有聚合物大小中增加了SOC和DOC.
微塑料暴露改变了土壤微生物社区结构,多样性和功能基因,这是碳转化变化的关键驱动因素.

结论:

微塑料对土壤碳转化和微生物群落在土壤总量层面产生重大影响.
微塑料诱导的功能性基因变异对于它们对土壤碳循环的影响的调解至关重要.
这项研究提供了关于微塑料对土壤碳循环造成的风险和干扰的见解.

关键词:

二氧化碳排放的二氧化碳排放量.功能性基因是指功能性的基因.微塑料是一种微塑料.土壤聚合物土壤聚合物土壤细菌群落土壤细菌群落

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