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降低性土壤消毒影响低密度聚乙烯和聚酸酸微塑料和塑料球中的微生物群落的微生物衰老

Jiahe Miao¹, Yining Zhu², Wen Li³

¹Key Laboratory of Environmental Biotechnology (XMUT), Fujian Province University, Xiamen University of Technology, Xiamen, 361024, China; Fujian Engineering and Research Center of Rural Sewage Treatment and Water Safety, Xiamen University of Technology, Xiamen, 361024, China.

Journal of environmental management

|November 25, 2024

概括

降低性土壤消毒 (RSD) 改变了微塑料 (MP) 的老化:它抑制了低密度聚乙烯 (LDPE) 的老化,但通过重塑土壤微生物群落来促进聚酸 (PHA) 的老化.

科学领域:

环境科学环境科学
土壤科学土壤科学
微生物学微生物学

背景情况:

农业土壤中微塑料 (MP) 的积累是一个日益严重的环境问题.
降低性土壤消毒 (RSD) 是一种对污染物的命运有潜在影响的土壤处理方法.
RSD对MP衰老和相关微生物群落的影响在很大程度上是未知的.

研究的目的:

研究RSD对低密度聚乙烯 (LDPE) 和聚酸 (PHA) 微塑料老化过程的影响.
阐明潜在的机制,包括微生物群落的转移,影响RSD条件下的MP衰老.

主要方法:

化实验来评估MP的衰老.
微生物社区分析 (包括功能基因预测).
土壤提取物的3D激发发射矩阵 (3DEEM) 分析.

主要成果:

RSD治疗抑制了LDPE衰老,但促进了PHA衰老.
RSD重塑了微生物群落,减少了LDPE塑料圈中的脂质代谢.
在PHA塑层中与聚3-基酸脱聚合酶 (phaZ) 相关的细菌的丰富与增加的PHA衰老相关.
在土壤中,PHA老化增加了与铁类物质的含量.

结论:

RSD显著影响土壤中不同类型的微塑料的老化.
微生物社区结构和功能是RSD下的MP衰老的关键驱动因素.
这些发现突出了RSD对微塑料命运和土壤微生物生态学的生态影响.

关键词:

衰老的衰老衰老的衰老可生物降解的微塑料.微生物社区的微生物社区.塑性球是指塑性球 (Plastisphere) 是指塑性球.减少性土壤消毒减少性土壤消毒

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