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表面修饰显著改变了纳米聚烯对沉积物微生物群落和代谢的影响

Jiaqi Zhao¹, Lingzhan Miao², Yu Yao³

¹Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, People's Republic of China; The Fu Foundation School of Engineering and Applied Science, Columbia University, 500 W. 120th Street, New York, NY 10027, USA.

Journal of hazardous materials

|August 29, 2023

概括

纳米塑料的表面修饰显著影响水生微生物群落和功能. 氨基基改性纳米塑料抑制了真菌,而所有纳米塑料改变了循环,影响了生态过程.

科学领域:

环境科学环境科学
微生物学微生物学
生态毒理学生态毒理学

背景情况:

纳米塑料是普遍存在的环境污染物,具有很大程度上未知的生态风险.
纳米塑料的表面特性极大地影响了它们的毒性和环境命运.
关于改性纳米塑料对水生微生物群落和生态系统功能的影响的研究有限.

研究的目的:

研究纳米聚烯 (nPS) 和其表面修饰形式 (nPS-NH2,nPS-COOH) 对沉积物细菌和真菌群落的影响.
评估这些纳米塑料对关键微生物功能的影响,特别是化和脱化.
确定表面修饰如何影响水生环境中的纳米塑料生态毒性.

主要方法:

在60天的潜伏期内,沉积物微生物群落暴露于nPS,nPS-NH2和nPS-COOH.
使用分子技术分析细菌和真菌社区结构.
测量化和脱率,包括关键酶的活性 (NAR,NIR,NOR,NOS).

主要成果:

菌群体被nPS-NH2显著抑制; 细菌多样性在治疗过程中保持稳定.
所有nPS治疗都抑制了化.
通过nPS-NH2和nPS-COOH增强了脱,酶活性增加,气产生,酸盐水平降低.

结论:

表面修饰是决定纳米塑料对水生微生物群落生态毒理学影响的关键因素.
纳米塑料可以显著改变沉积物中的循环过程,对生态系统健康产生影响.
需要进一步的研究才能充分了解表面修饰纳米塑料带来的生态风险.

关键词:

细菌社区的细菌社区脱化过程中的脱.菌社区的真菌社区.纳米塑料的纳米塑料沉积物沉积物是一种沉积物.

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