相关实验视频
Updated: Sep 11, 2025

04:35
Preparation of Free-Surface Hyperbolic Water Vortices
Published on: July 28, 2023
2.9K
揭示微生物机制,用于化物和营养物质的去除铁碳构建湿地在微氧调节下的微生物机制
Mingjun Li1, Shiyuan Wei1, Xin Zhao1
1Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Qingdao 266237, PR China.
Journal of hazardous materials
|August 16, 2025
概括
在建筑湿地 (CWs) 中的铁碳微电解有效地去除化物和,同时也影响了去除和微生物群落. 这种方法在压力条件下提高了污染物处理.
科学领域:
- 环境工程 环境工程
- 水处理技术水处理技术
- 微生物生态学 微生物生态学
背景情况:
- 化物 (F−) 和营养污染物 (,) 的同时存在,由于不同的物理化学性质,造成了复杂的废水处理挑战.
- 建筑湿地 (CWs) 为综合污染物清除提供基于自然的解决方案,但它们在联合污染物压力下的有效性需要优化.
- 铁-碳 (Fe-C) 微电解是CW的潜在增强,以改善污染物减弱.
研究的目的:
- 评估五个构造湿地 (CW) 配置在微氧调节下的不同基板的性能,重点是铁碳 (Fe-C) 微电解.
- 在连续流条件下评估化物 (F−),总 (TN) 和总 (TP) 的去除效率.
- 研究微生物社区结构和功能性基因表达,以应对受污染物压力下的Fe-C微电解.
主要方法:
- 评估五种不同基质的CW类型,包括Fe-C微电解配置 (CW-E和CW-D).
- 测量F−,TN和TP去除效率的连续流体实验.
- 使用高通量测序和功能性基因表达特征 (例如,电子转移,定数感应) 的微生物社区分析.
主要成果:
- 在F-压力下,Fe-C微电解CWs (CW-E) 实现了高F-去除 (40.14%) 和持续的TP去除 (高达99%) 在F-压力下,与中度TN去除 (72%).
- 与其他配置相比,CW-E显示出优异的同时多污染物去除,尽管CW-D显示出更稳定的去除.
- Fe-C微电解改变了微生物群落,丰富了电活性细菌 (例如,Bacillus,Desulfomicrobium) 并升级了电子转移和定数感应 (QS) 的功能基因,这与直接电子转移 (DET) 有正相关.
结论:
- 集成到CW中的Fe-C微电解显著提高了化物和的去除,即使在联合污染物压力下.
- 微生物社区的结构和功能通过Fe-C微电解重塑,促进关键细菌和污染物降解和积累的途径.
- 这项研究表明,Fe-C微电解是分散废水系统中多污染物处理的有希望的强化策略.
相关概念视频
Microbial Nutrition
292
Organisms exhibit remarkable metabolic diversity, categorized based on how they acquire energy and carbon. These strategies enable survival in various ecological niches and are essential for maintaining energy flow and nutrient cycling within ecosystems.Energy and Carbon SourcesOrganisms are classified as phototrophs or chemotrophs based on energy acquisition. Phototrophs use light as their energy source, while chemotrophs rely on oxidizing chemical compounds. Further differentiation arises...
292
Environmental Applications of Microorganisms
242
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
242
Oxygen Requirements and Growth Patterns
238
Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:● Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the...
238
Metabolism of Chemolithotrophs
168
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
168
Factors Affecting Solubility
33.9K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
33.9K
Physical Methods for Controlling Microbial Growth: Radiation and Filtration
218
Radiation and filtration are essential tools for microbial control, targeting microorganisms through distinct mechanisms. Radiation eliminates microbes by damaging their DNA, either killing them or inhibiting their growth. Based on wavelength, radiation is classified into two types: nonionizing and ionizing radiation.Non-ionizing radiation, such as UV radiation (200–400 nm), is absorbed by DNA, causing defects that effectively disinfect surfaces, air, and water, including safety cabinets.
218

