通过铁碳微电解来增强硫酸盐的降解:微电解和微生物之间的相互作用机制
Hanzhe Li1, Junzhen Di2, Yanrong Dong1
1College of Civil Engineering, Liaoning Technical University, Fuxin, 123000, China.
Environmental science and pollution research international
|April 18, 2024
概括
铁碳微电解与减少硫酸盐的细菌相结合,有效地去除高度的硫酸盐废水,即使在低pH值. 这种增强的生物反应器技术促进了减少硫酸盐的细菌的生长,为工业废水处理提供了可持续的解决方案.
科学领域:
- 环境工程 环境工程
- 微生物学 微生物学
- 电化学 电化学 电化学
背景情况:
- 硫酸盐废水对水,土壤和植物生命构成重大环境风险.
- 铁碳微电解 (IC-ME) 是一种可持续的方法来处理硫酸盐废水.
- 减少硫酸盐的细菌 (SRB) 对于废水处理中减少硫酸盐至关重要.
研究的目的:
- 评估铁碳微电解增强生物反应器的性能,用于高度硫酸盐废水处理.
- 为了研究不同硫酸盐度,液压保留时间 (HRT) 和COD/SO比对处理效率的影响.
- 阐明硫酸盐去除的机制和SRB丰富在IC-ME系统中的作用.
主要方法:
- 四个上流柱生物反应堆的建造和运行:IC-ME (R1),分层IC-ME (R2),活性炭 (R3) 和废铁 (R4).
- 硫酸盐度,HRT和COD/SO比率的实验操纵.
- 监测硫酸盐去除速率,氧化降低潜力 (ORP) 和微生物群体分析 (SRB丰度).
主要成果:
- 在最佳条件下,R1反应堆实现了98.08%的硫酸盐去除率 (HRT=12小时,COD/SO=1.4).
- IC-ME系统在低pH下保持稳定的运行,ORP值有利于SRB活动 (-350至-450mV).
- 生物分析证实R1反应堆中SRB的丰度明显更高,这表明SRB的缩和竞争优势有所提高.
结论:
- 铁碳微电解显著提高了废水处理中的减少硫酸盐细菌的硫酸盐去除效率.
- IC-ME与生物过程之间的协同作用提高了硫酸盐的生物降解性,并允许在具有挑战性的低pH条件下运行.
- IC-ME生物反应器是有效处理高度硫酸盐废水的有希望和可持续的技术.
相关概念视频
Bioremediation
18.3K
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.
18.3K
Precipitation and Co-precipitation
1.8K
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...
1.8K
The Sulfur Cycle
44.1K
Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...
44.1K
Electrolysis
26.3K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
26.3K
Oxidation and Reduction of Organic Molecules
6.5K
Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
The removal of an electron from a molecule, results in a...
6.5K
Preparation and Reactions of Thiols
6.2K
Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
6.2K


