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土壤的生物化学特性和生态系统功能对微塑料污染的反应

Yanan Cheng¹, Fei Wang², Wenwen Huang²

¹School of Resources and Environment, Henan Institute of Science and Technology, 90 Eastern Hualan Avenue, Xinxiang, 453003, China. yncheng@hist.edu.cn.

Scientific reports

|November 16, 2024

概括

聚乙烯微塑料 (MPs) 对土壤健康产生负面影响. 较小的MP降低了呼吸和酶活性,而较大的MP改变了营养水平,表明对土壤生态系统的风险取决于剂量和大小.

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:

微塑料污染在陆地生态系统中越来越令人担忧.
了解微塑料对土壤营养循环和微生物活动的影响,对于评估土壤健康至关重要.

研究的目的:

研究不同尺寸和度的聚乙烯微塑料 (PE MPs) 对土壤生化特性和生态系统功能的影响.
确定受微塑料污染影响的土壤生态系统功能的关键指标.

主要方法:

土壤暴露于PE MPs (13微米和130微米) 的不同度 (0-10% w/w).
测量土壤呼吸速率,酶活性 (尿酶,β-葡萄糖酶,催化酶),pH值和营养含量 (可用的,溶解的活性,溶解的有机碳,可用的,总溶解的).

主要成果:

13微米的MP降低了土壤呼吸,β-葡萄糖酶和酶活性,同时增加了尿酶活性和降低了pH,可用的,溶解的活性,溶解的有机碳和可用的.
130微米的MP对溶解的有机碳和溶解的活性的影响很小,但降低了pH值,总溶解,可用的和可用的在高度下,同时增加了土壤呼吸.
土壤生态系统功能被MP显著减少,呼吸速率,可用的,溶解的活性和β-葡萄糖酶活性是关键预测因素.

结论:

微塑料污染对土壤生态系统功能构成重大风险,改变营养循环和微生物活动.
微塑料对土壤健康的影响取决于颗粒大小和度 (剂量依赖和大小依赖).
需要进一步的研究来了解微塑料在农业生态系统中的长期行为和后果.

关键词:

微塑料是一种微塑料.聚乙烯聚乙烯的使用方法土壤的生物化学特性土壤生态系统的功能

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