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微塑料衍生溶解有机物在环境相关度对土壤溶解有机物转化的多种影响

Yiping Luo¹, Yong Shi¹, Yufan Wang¹

¹College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China.

Environmental science & technology

|August 21, 2025

概括

来自农业的微塑料溶解有机物 (MPs-DOM) 改变了土壤的DOM动态. 不同的浸出条件和土壤类型影响了MPs-DOM的生物可用性及其对土壤碳循环的影响.

科学领域:

环境化学
土壤科学
微生物学

背景情况:

溶解有机物对土壤生态系统功能至关重要.
农业可以释放微塑料 (MPs) 衍生的溶解有机物 (MPs-DOM).
在环境相关度下,MPs-DOM对土壤DOM动态的影响尚不清楚.

研究的目的:

研究由MPs-DOM影响的土壤DOM的转变.
为了比较不同条件下 (紫外线和黑暗) 和不同类型的覆盖物中出的MP-DOM的影响.
评估土壤微生物群落在这些转变中扮演的角色.

主要方法:

在黄色 (YS) 和黑色 (BS) 土壤中添加MPs-DOM (来自可生物降解和不可生物降解的土壤).
在紫外线照射和黑暗条件下对DOM成分和生物可用性的分析.
微生物社区分析,专注于蛋白质细菌的作用.

主要成果:

提取条件,而不是覆盖物类型,主要确定MPs-DOM生物可用性.
用紫外线处理的MP-DOM,富含脂质和蛋白质/氨基糖,增强了DOM转化和可变性,特别是在低多样性的YS中.
在高多样性的BS中,UV-MPs-DOM被快速代谢,增加了DOM复原性,而黑暗处理的MPs-DOM则累积,增加了DOM可变性.

结论:

在环境相关的度下,MPs-DOM通过不同的途径显著改变了土壤DOM的动态.
MPs-DOM的生物可用性和土壤微生物群落结构是控制其命运和影响的关键因素.
这些发现凸显了土壤中微塑料污染带来的长期生态风险.

关键词:

里叶变换离子环子共振质谱不稳定性微生物群落来自微塑料的溶解有机物土壤中溶解的有机物

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