利用导电材料重塑下水道微生物组,减轻硫化物和硫化形成的腐蚀
Gede Adi Wiguna Sudiartha1,2, Tsuyoshi Imai3
1Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi, 755-8611, Japan.
Scientific reports
|July 1, 2025
概括
使用 (Ni) 和磁石黑 (MTB) 的导电层显著提高了下水道混凝土反应堆的性能. 这些材料有效降解了硫酸盐,硫化物和硫化,减轻了下水道腐蚀.
科学领域:
- 环境工程 环境工程
- 微生物腐蚀 微生物腐蚀
- 材料科学 材料科学 材料科学
背景情况:
- 污水腐蚀是由微生物的硫化合物代谢驱动的,造成了严重的基础设施损坏.
- 这种情况的恶化与公共安全问题有关,例如沉坑和道路崩.
- 有效的缓解策略对于保持下水道系统完整性至关重要.
研究的目的:
- 调查 (Ni) 和铁基磁石黑 (MTB) 作为导电层材料的有效性.
- 为了提高硫酸盐,硫化物和硫化在下水道环境中的降解.
- 评估这些外对微生物活动和硫化物减少的影响.
主要方法:
- 实验室规模的混凝土反应堆 (CCR) 的建造有三个配置:5%的Ni线,MTB线和100%的波特兰水泥.
- 进行12个实验周期来评估材料性能.
- 监测硫酸盐,硫化物和硫化度以及微生物群落动态.
主要成果:
- 在Ni和MTB线的CCR中,分别在第10和第11个周期实现了完全的硫酸盐耗尽.
- 根据MTB规定的CCR显示了优异的硫化物和硫化去除 (99%的减少) 和较低的排放.
- 观察到增强的微生物活动,包括协同作用的细菌和甲硫化物消耗,由导电材料促进.
结论:
- 导电材料外 (Ni和MTB) 显示出缓解硫化物诱导的下水道腐蚀的巨大潜力.
- 这些材料增强了微生物降解硫化合物,提高了下水道基础设施的耐用性.
- 这种方法为延长下水道系统寿命提供了一个可持续的解决方案.
相关概念视频
Corrosion of Reinforcement
257
The corrosion of steel reinforcement within concrete is a process influenced by the material's inherent properties and external factors. The high pH level of around 13, provided by calcium hydroxide present in concrete, initially protects the steel reinforcement by promoting the formation of a passive iron oxide layer on its surface.
However, over time and under certain conditions like carbonation, chloride ingress, and cracking this protective state can be compromised. Steel has areas with...
However, over time and under certain conditions like carbonation, chloride ingress, and cracking this protective state can be compromised. Steel has areas with...
257
Waterproofing and Anti-Bacterial Admixtures in Concrete
114
Concrete's susceptibility to water absorption is due to the capillary action within the pores of its hydrated cement paste. This action draws water in, creating the need for waterproofing admixtures to prevent such penetration. The efficacy of these admixtures is contingent upon the water pressure, with variations arising from different conditions such as rain, capillary rise, or hydrostatic pressure in structures intended to hold water.
Waterproofing admixtures render concrete hydrophobic,...
Waterproofing admixtures render concrete hydrophobic,...
114
Corrosion
25.6K
The degradation of metals due to natural electrochemical processes is known as corrosion. Rust formation on iron, tarnishing of silver, and the blue-green patina that develops on copper are examples of corrosion. Corrosion involves the oxidation of metals. Sometimes it is protective, such as the oxidation of copper or aluminum, wherein a protective layer of metal oxide or its derivatives forms on the surface, protecting the underlying metal from further oxidation. In other cases, corrosion is...
25.6K
Bioremediation
20.2K
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.
20.2K
Sulfur Assimilation
79
Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...
79
Sulfate Attack on Concrete
312
Sulfate attack on concrete is a deterioration process characterized by a whitish discoloration beginning at the edges and corners, accompanied by cracking and spalling. This phenomenon occurs when sulfates react with the components of hardened concrete, forming compounds like calcium sulfate and calcium sulfoaluminate which occupy more space than the substances they replace, causing the concrete to expand and disrupt.
Sulfates from sources like soil, groundwater, or industrial effluents...
Sulfates from sources like soil, groundwater, or industrial effluents...
312


