经冷解的聚乙烯和聚烯微塑料改变了土壤中的酶活性和微生物群体组成
Yanjun Li1, Guanghui Xu2, Yong Yu2
1Key Laboratory of Wetland Ecology and Environment, State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Journal of hazardous materials
|April 11, 2024
概括
结冰解周期改变了寒冷地区土壤中的微塑料 (MP),影响了土壤酶活性和微生物群落结构. 特别是聚烯MP,尽管改变了土壤过程,但显示出污染物降解的潜力.
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 (MP) 是寒冷地区土壤中的持久污染物.
- 结冰解 (FT) 衰老对土壤结合的MP的影响及其生态影响在很大程度上是未知的.
研究的目的:
- 调查FT年龄的国会议员对土壤物理化学特性和微生物群落的影响.
- 评估不同MP类型 (聚乙烯和聚烯) 和尺寸 (50和500微米) 在FT老化后对土壤健康的影响.
主要方法:
- 用环境相关度的MPs处理的土壤样本经过了45天的冷解周期 (FTC).
- 分析了MP表面形态,疏水性和结晶性的变化.
- 测量了土壤尿素酶 (SUE) 活性和微生物群落结构 (香农指数,网络复杂性).
主要成果:
- FTCs改变了MP表面形态,疏水性和结晶性.
- 土壤尿素酶活性有显著的变化,与对照组相比,500微米PE和PPMP的活性增加了.
- 微生物社区分析显示,老年PP-MP中网络复杂性增加和与污染物降解相关的特定细菌生物标志物.
结论:
- 在寒冷的地区,FT年龄的MP,特别是聚烯,可以改变土壤酶活性和微生物社区结构.
- 陈旧的PP-MP可能在污染物降解中发挥作用,但也会破坏土壤代谢过程.
- 这项研究强调了MP在冷土壤环境中经过冷解老化后存在的潜在生态风险.
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