一种新的微生物溶解-再沉途径用于生物水泥生产石灰岩的生物化
Raja Murugan1, Anant Aishwarya Dubey1, Navdeep K Dhami2
1School of Civil and Mechanical Engineering, Curtin University Bentley, Perth, WA, 6102, Australia.
Applied microbiology and biotechnology
|December 23, 2025
概括
这项研究介绍了生物烧结,一种新的微生物工艺,使用石灰岩来制造生物水泥. 乙菌 (Acetobacter aceti) 促进石灰岩溶解和石沉,为建筑材料提供了一个可持续的替代品.
科学领域:
- 地质学和微生物学
- 生物水泥化和可持续的建筑材料
背景情况:
- 自然生物凝固过程,如树脂岩石的形成,涉及CaCO3的溶解和沉.
- 现有的生物凝固方法通常依赖于尿素或合成添加剂,造成环境问题.
研究的目的:
- 通过使用石灰岩的新型生物烧结工艺模仿自然生物化.
- 为了研究由Acetobacter aceti.通过微生物调解石灰岩溶解和石沉的微生物调解.
- 探索生物水泥生产的可持续途径,以减少碳足迹.
主要方法:
- 在乙醇和石灰石粉末混合物中使用的Acetobacter aceti (ATCC 15973).
- 监测pH值变化以追踪石灰岩溶解和随后的生物水泥沉.
- 使用富里埃变换红外光谱学,扫描电子显微镜,X射线衍射和粒子大小分析来描述反应产物.
主要成果:
- 阿西托巴克特 (Acetobacter aceti) 诱导了pH值的快速下降,将石灰岩溶解成酸.
- 细菌酸盐的氧化导致了逐渐的pH值增加和生物水泥晶体的沉.
- 鉴定证实沉物主要是石,表明微生物烧结溶解的碳酸.
结论:
- 新的生物聚变工艺有效地使用石灰岩作为生物水泥生产的直接来源.
- 这种方法消除了对尿素或合成添加剂的需求,提供了一个环保的替代方案.
- 生产的生物水泥对土壤稳定和生态混凝土的应用非常有前途,促进了可持续建筑的发展.
相关概念视频
01:24Hydration of Cement
748
Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
748
04:01Factors Affecting Solubility
36.5K
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:
36.5K
01:08Sample Preparation for Analysis: Advanced Techniques
1.2K
Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
1.2K
01:30Environmental Applications of Microorganisms
890
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...
890
01:12Precipitation Processes
4.6K
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
4.6K
00:52Washing, Drying, and Ignition of Precipitates
5.0K
After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
5.0K