在无氧被动柱中使用含有土著降低的细菌的废弃铁泥去除氧介导的Cr (VI)
1Department of Earth Resources Engineering, Kyushu University, Fukuoka 819-095, Japan.
Water research
|December 22, 2025
概括
废铁污泥有效地弥补了Cr (VI) 的污染. 添加有机废弃物可以增强微生物的减少,长期固定,并满足处理限制,以提高水的安全性.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 微生物生态学 微生物生态学
背景情况:
- 六价 (Cr(VI)) 对环境和健康构成重大风险.
- 传统的整治方法经常面临长期稳定性和成本效益方面的挑战.
研究的目的:
- 评估Cr (VI) 补救的被动柱系统的长期性能.
- 评估废弃物Fe-sludge的有效性,加上有机电子捐赠者,用于Cr(VI) 排毒和固定.
主要方法:
- 使用Fe-sludge和有机修正品 (堆肥, sake lees) 的连续流动柱实验.
- 批量吸附试验和深度解析固态分析.
- Cr K-边缘X射线吸收近边缘结构 (XANES) 和 Fe K-边缘XANES,X射线衍射 (XRD).
- 有毒性特征泄漏程序 (TCLP) 用于评估可泄漏性.
主要成果:
- 铁/堆肥柱在200多天内保持了废水Cr (VI) 在0.2毫克/升以下.
- (VI) 减少到 (III) 随着深度的增加,在Fe/堆肥列中达到高达93%.
- 固定式Cr在处理的污泥段中达到美国的处置限制 (≤5 mg/L).
- 铁泥的性能是碳有限的,没有有机修订,突出显示微生物活动.
结论:
- 废弃物Fe-sludge与废弃物衍生有机物相结合,为Cr (VI) 污染的水提供了可持续和有效的被动处理.
- 通过本地细菌进行的氧化转化介导的固定是长期Cr排毒的关键机制.
- 这种方法为处理酸性Cr污染的工业废水提供了一个实际的解决方案.
更多相关视频
15:19Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
Published on: October 15, 2015
10.1K
05:52Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal
Published on: June 2, 2022
3.3K
相关概念视频
Redox Titration: Other Oxidizing and Reducing Agents
1.3K
Besides iodine, other oxidizing or reducing agents can serve as titrants in redox titrations. Common oxidizing titrants include KMnO4, cerium(IV), and K2Cr2O7. The choice of oxidizing titrants depends on factors like stability, cost, analyte strength, and reaction rate between the analyte and titrant. KMnO4 is a strong oxidizing titrant that reduces from Mn(VII) to Mn(II) in a highly acidic solution, simultaneously oxidizing the analyte to a higher oxidation state. In this case, KMnO4 acts as a...
1.3K
Redox Reactions
58.1K
Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
58.1K
Redox Reactions
832
Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
832
Bioremediation
22.0K
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.
22.0K
Microbial Nutrition
1.0K
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...
1.0K
Metabolism of Chemolithotrophs
712
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.
712
