微生物群落组合通过人工和铁酸盐的共沉降而改变:对碳固定路径转化的影响
Shuang Ai1, Xiaobin Wang1, Jiayu Zhu1
1College of Engineering, Northeast Agricultural University, Harbin, China; International Cooperation Joint Laboratory of Health in Cold Region Black Soil Habitat of the Ministry of Education, China.
The Science of the total environment
|July 19, 2024
概括
像人工富尔维酸 (A-FA) 和人工酸 (A-HA) 这样的人工化物 (A-HS) 通过影响微生物通路和碳固定,显著降低了土壤碳排放 (CO2和CH4). 这为缓解气候变化提供了潜力.
科学领域:
- 土壤科学 土壤科学
- 环境微生物学 环境微生物学
- 生物地质化学生物地质化学
背景情况:
- 众所周知,碳铁相互作用可以抑制土壤碳矿化.
- 人工酸 (A-HS),如人工酸 (A-FA) 和人工酸 (A-HA) 与铁酸盐在这个过程中的特定作用尚不清楚.
- 了解这些机制对于土壤碳捕获和气候变化缓解至关重要.
研究的目的:
- 为了研究A-FA和A-HA与铁酸盐结合在无氧条件下对碳矿物化的影响,在水洪水条件下.
- 分析碳排放 (CO2和CH4) 的趋势.
- 确定相关的微生物社区结构和功能途径.
主要方法:
- 建立了模拟的无氧水泛滥条件.
- 应用了人工化物质 (A-FA,A-HA) 和铁化物.
- 监测了碳排放 (CO2,CH4) 的情况.
- 使用16S rDNA测序分析了微生物社区结构.
- 功能性途径通过基因分析来预测.
主要成果:
- 无论是A-HA还是A-FA,都显著减少了CO2和CH4的排放.
- A-FA对碳固定产生显著影响,使二氧化碳度减少了一半.
- 低Fe (II) 度表明,A-FA和A-HA可能会阻碍非模拟性铁还原 (DIR).
- 微生物分析揭示了社区结构和功能的转变,其中甲细菌被确定为主要的性甲原体.
- 用于Clostridium carboxidivorans的还原性酸循环被确定为主要的碳固定途径.
结论:
- 在模拟的田条件下,A-HS,特别是A-FA,加上化,有效抑制土壤碳矿化,减少温室气体排放.
- 这些A-HS影响微生物群落和碳固定途径,特别是还原性酸循环.
- 这些发现突出了A-HS在增强土壤碳储存,提高土壤肥力和为减缓气候变化努力做出贡献方面的潜力.
更多相关视频
07:22Author Spotlight: Unraveling the Role of Earthworms in Enhancing Mineral Weathering for CO2 Removal
Published on: November 10, 2023
3.4K
06:52Experimental Column Setup for Studying Anaerobic Biogeochemical Interactions Between Iron OxyHydroxides, Trace Elements, and Bacteria
Published on: December 19, 2017
7.8K
相关概念视频
01:17Precipitation and Co-precipitation
1.7K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
1.7K
01:10Types of Coprecipitation
589
Coprecipitation is the contamination of a precipitate by otherwise soluble species and occurs via different processes. In colloidal precipitates, coprecipitation occurs via surface adsorption. For instance, barium sulfate has a primary layer of adsorbed barium ions and a secondary layer of nitrate counterions. This results in contamination of the precipitate by barium nitrate.
Sometimes, ions in a crystal lattice can undergo isomorphous replacement by inclusions of similar charge and size. For...
Sometimes, ions in a crystal lattice can undergo isomorphous replacement by inclusions of similar charge and size. For...
589
01:06Coagulation
280
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
280
01:09Colloidal precipitates
544
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
544
01:12Precipitation Processes
442
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
442