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碳纳米材料在一次性和重复性暴露下对土壤微生物群体的功能多样性和结构的影响
Wenjuan Liu1, Zihan Wang1, Guoli Chai1
1Institute of Loess Plateau, Shanxi University, Taiyuan, 030006, China.
Environmental science and pollution research international
|October 28, 2023
概括
对像石墨烯和富勒伦这样的碳纳米材料 (CNM) 的重复暴露会比单次暴露更加强土壤微生物的活动和多样性. 暴露场景,而不是CNM类型,最受影响的土壤微生物.
科学领域:
- 环境科学 环境科学
- 土壤微生物学 土壤微生物学
- 纳米毒理学研究
背景情况:
- 碳纳米材料 (CNM) 被广泛使用,引发了人们对其环境影响的担忧.
- 现有的研究往往侧重于单个CNM暴露,而不是现实的,重复的低度场景.
研究的目的:
- 调查多壁碳纳米管 (MWCNTs),石墨烯 (GR) 和烯 (C60) 对土壤微生物群落结构和代谢功能的单次或重复暴露的影响.
- 为了比较不同的CNM类型和暴露场景对土壤微生物的影响.
主要方法:
- 使用Biolog EcoPlates评估了土壤微生物社区的代谢功能.
- 通过高通量测序来分析社区结构.
- 对MWCNTs,GR和C60.0的单次和重复暴露效应进行比较分析.
主要成果:
- 与一次性暴露相比,重复的CNM暴露显著增强了土壤微生物的代谢活性和多样性.
- 石墨烯 (GR) 对土壤微生物多样性的影响比C60和MWCNT更强.
- 土壤微生物的代谢活动更多地受到暴露场景 (单次 vs 重复) 的影响,而不是特定类型的CNM.
结论:
- 对CNM的重复,低度暴露可以刺激土壤微生物群落.
- 暴露场景是决定CNM对土壤微生物生态的影响的关键因素.
- 这些发现为环境环境中纳米材料风险评估提供了新的视角.
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