相关实验视频

Updated: Sep 12, 2025

Experimental Column Setup for Studying Anaerobic Biogeochemical Interactions Between Iron OxyHydroxides, Trace Elements, and Bacteria

Experimental Column Setup for Studying Anaerobic Biogeochemical Interactions Between Iron OxyHydroxides, Trace Elements, and Bacteria

Published on: December 19, 2017

三价瓦纳沉在Siderite-Dependent Vanadate生物还原中,通过在地下水中使细菌脱化

Baogang Zhang¹, Yangmei Fei¹, Muhe Diao²

¹State Key Laboratory of Geomicrobiology and Environmental Changes, Frontiers Science Center for Deep-time Digital Earth, School of Water Resources and Environment, China University of Geosciences Beijing, Beijing 100083, P. R. China.

Environmental science & technology

|August 11, 2025

概括

无化细菌使用 siderite 将危险的 vanadate [V ((V)) ] 降低为稳定的三价 [V ((III)) ] 沉. 这种微生物过程增强了的生物修复和水层中的稳定性.

科学领域:

环境科学环境科学
地质化学地质化学
微生物学微生物学

背景情况:

(V) 在环境中存在多个价值状态 (+3,+4,+5).
微生物减少危险的酸[V(V) ]对于地化学和排毒至关重要.
四价瓦纳[V ((IV)) ]是减少后常见的,但容易发生再氧化.

研究的目的:

通过使用 siderite 对细菌进行非化来研究自性 V(V) 减少.
描述由此产生的沉及其稳定性.
阐明涉及的微生物机制和电子转移途径.

主要方法:

使用了先进的表征技术:TEM,XPS,XRD,XANES,EXAFS和莫斯巴乌尔光谱学.
使用的非化细菌是Acidovorax sp. 菌株 BoFeN1 和伪古尔本基亚尼亚 sp. 2002年菌株. 这种菌株是 2002.
分析的基因表达与V (V) 减少和Fe (II) 氧化有关 (napA,nirS,mtoA).

主要成果:

证实了三价V [V(III) ]沉物形成为库尔索尼特 (FeV₂O₄) 和V(IV) 形成为VO(OH) ₂.
显示V(III) 融入磁铁网,形成稳定的FeV₂O₄,耐再氧化.
确定了电子转移媒介 (细胞C, рибофлавин,) 和关键基因.

结论:

通过使用 siderite 的特定无化细菌进行自性 V(V) 减少,导致稳定的 V(III) 沉物.
微生物V(V) 减少通过引入和本地细菌与 siderite 之间的协同相互作用而得到增强.
这一过程提供了对的生态化学循环和有效的生物修复策略的见解.

关键词:

生物修复是一种生物修复.脱的细菌可以使其脱.减少微生物的减少.这是一种Siderite.瓦纳是一种.

更多相关视频

A Dual-Functional Electroactive Filter Towards Simultaneously SbIII Oxidation and Sequestration

A Dual-Functional Electroactive Filter Towards Simultaneously SbIII Oxidation and Sequestration

Published on: December 5, 2019

Laboratory Simulation of an IronII-rich Precambrian Marine Upwelling System to Explore the Growth of Photosynthetic Bacteria

Laboratory Simulation of an IronII-rich Precambrian Marine Upwelling System to Explore the Growth of Photosynthetic Bacteria

Published on: July 24, 2016

相关概念视频

Precipitation and Co-precipitation

Precipitation and Co-precipitation

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...

Gravimetry: Inorganic And Organic Precipitating Agents

Gravimetry: Inorganic And Organic Precipitating Agents

In gravimetry, the precipitant is chosen carefully to obtain a pure solid that can be easily filtered. Common inorganic precipitants can be used to determine several cations and anions. In some cases, the formation of the same precipitate can be used to determine the cation and the anion. For example, the reaction of barium and chromate ions to give barium chromate is used to determine both barium and chromate. However, precipitates such as hydroxides, oxalates, and metal ammonium phosphates...

Precipitation Gravimetry

Precipitation Gravimetry

Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...

Precipitation of Ions

Precipitation of Ions

Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:

Voltammetry: Stripping Methods

Voltammetry: Stripping Methods

Anodic Stripping Voltammetry (ASV), Cathodic Stripping Voltammetry (CSV), and Adsorptive Stripping Voltammetry (AdSV) are electrochemical techniques used to determine trace amounts of analytes in solution. These methods involve applying a potential to an electrode and measuring the resulting current.
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...

Metabolism of Chemolithotrophs

Metabolism of Chemolithotrophs

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.