阴离子类型对软粘土的物理化学参数和微观结构的影响,用于电化学处理
Guohui Yuan1,2,3, Xiaomeng Cao4, Ziyang Gao1,2
1College of Civil Engineering and Architecture, Wenzhou University, Wenzhou, China.
Scientific reports
|December 29, 2024
概括
阴离子价值显著影响电化学土壤强化. 像Ca2+和Fe3+这样的高价值子提高了土壤导电性,剪切强度和微观结构,优于Na+处理.
科学领域:
- 地质技术工程 地质技术工程
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 电化学增强是改善软粘土特性的一种有前途的技术.
- 了解阴子影响对于优化电化学接处理至关重要.
- 微观结构的变化决定了土壤增强的有效性.
研究的目的:
- 为了研究不同的 (Na+,Ca2+,Fe3+) 如何影响电化学增强软粘土的微观结构特征.
- 为了阐明在电化学接过程中受到子价值的影响的强化机制.
- 为了比较电化学处理的微观结构结果,使用不同的阴子注射.
主要方法:
- 进行了四组室内实验,使用NaCl,CaCl2和FeCl3盐溶液进行软粘土接.
- 采用电化学增强技术处理土壤样本.
- 分析了微观结构性质,包括毛孔体积,毛孔大小分布,电透性和导电性.
主要成果:
- 增加阴离子价值显著增强了电化学增强效应和土壤微观结构性质.
- 高价值 (Ca2+,Fe3+) 增加了电透性和导电性,从而提高了剪切强度.
- 电化学处理与阴离子导致孔积增加由于花,与更均的孔尺寸分布,特别是在阴极区域.
- 来自Ca2+和Fe3+的化学凝固减轻了花效应,与Na+相比,产生了优越的孔隙结构.
结论:
- 阴离子价值是电化学土壤强化中的关键因素,较高的价值值会产生更好的结果.
- 使用高价值离子的电化学接提供了一种优越的方法来改善软粘土的机械和微观结构性质.
- 该研究提供了对优化电化学增强的见解,通过为特定的土壤改善目标量身定制的阴子选择.
相关概念视频
01:17Ion Exchange
387
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
387
01:19Ionic Strength: Effects on Chemical Equilibria
1.2K
The addition of an inert ionic compound increases the solubility of a sparingly soluble salt. For example, adding potassium nitrate to a saturated solution of calcium sulfate significantly enhances the solubility of calcium sulfate. Le Châtelier's principle cannot predict this shift in the equilibrium. Instead, this could be explained in terms of changes in the effective concentration of the ions in solution in the presence of added inert salt.
In this solution, the primary...
In this solution, the primary...
1.2K
04:01Factors Affecting Solubility
32.8K
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:
32.8K
02:42Aqueous Solutions and Heats of Hydration
14.1K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
14.1K
01:08Electrodeposition
410
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
410
03:45Formation of Complex Ions
22.9K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
22.9K