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微塑料的多样性通过改变微生物的相互作用和电子消耗,刺激N₂O排放在NO₃^--N转化过程中,在化的水中改变微生物的相互作用和电子消耗

Xiaoyan Liu¹, Guojia Xu¹, Tingting Pei¹

¹Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.

Journal of hazardous materials

|February 16, 2025

概括

水生生态系统中的微塑料多样性通过改变微生物群落和抑制N2O减少,显著增加氧化 (N2O) 排放,尽管对酸盐转化有很小的影响.

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:

微塑料混合物在水生环境中普遍存在,但它们对循环和温室气体排放的影响尚未完全理解.
型水体特别容易受到转化和相关排放的改变.

研究的目的:

为了研究微塑料多样性对酸盐- (NO3--N) 转化和氧化物 (N2O) 排放在环保水生系统中的影响.
阐明将微塑料多样性,微生物群落结构和N2O生产联系在一起的机制.

主要方法:

微观宇宙实验是用不同程度的微塑料多样性 (0,1,3和5种类型) 进行的.
测量包括NO3-N转化速率,N2O排放流,微生物群体组成,共发生网络和电子转移过程.
评估了氧化还原酶 (NOR) 和酸盐还原酶 (NIR) 的活性.

主要成果:

微塑料的多样性显著增加了N2O排放,而NO3 - - N转化率仅略有影响.
增加的微塑料多样性导致更复杂和更稳定的微生物网络,间接促进N2O排放.
微塑料的多样性抑制了氧化氧化 (NOS) 的活性,并增加了 (nirK+nirS) /nosZ比率,表明减少了N2O的减少.

结论:

微塑料的多样性是一个关键因素驱动N2O排放在缩的水生环境.
主要机制涉及通过微塑料诱导的微生物群落变化和电子转移来抑制N2O减少.
研究结果强调了微塑料污染,循环和温室气体生产之间的复杂相互作用.

关键词:

电子消耗电子消耗电子消耗微生物网络是微生物网络.微塑料的多样性微塑料的多样性排放量为N(2) O的排放量 NO(3)(−) -N 的转换过程.

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Bioremediation

Bioremediation

Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.

Primary Production

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The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.