Method for predicting saturated permeability coefficient of clay mineral in electrolyte solution

Abstract

The invention provides a method for predicting a saturated permeability coefficient of a clay mineral in an electrolyte solution. The method comprises: step one, establishing a relationship model between types and concentrations of electrolyte solutions and permeability coefficients of the clay minerals; step two, carrying out collection to obtain a physical parameter of the model and a clay surface charge density parameter; step three, calculating surface charge densities of different types of clay minerals in a polar solution; step three, carrying out fixed-water-head testing to obtain permeability coefficients of different types of clay minerals certain designated electrolyte solutions with different concentrations and calculating relevant parameters needed by the model based on the relationship model and the surface charge densities of the clay mineral in the polar solution; and step four, on the basis of the relationship model with relevant parameters introduced and an actually measured electrolyte solution concentration, predicting a permeability coefficient of a clay mineral in the electrolyte solution with the concentration. Compared with the prior art, the invention provides a method capable of predicting the permeability coefficient of the clay mineral accurately theoretically.

Description

technical field [0001] The invention relates to the field of environmental ecology, in particular to a method for predicting the saturated permeability coefficient of clay minerals in an electrolyte solution. Background technique [0002] Clay minerals generally refer to layered aluminosilicates (sometimes with other components such as iron, alkali metals and alkaline earth metals). Due to the isomorphic replacement effect commonly found in clay minerals, the silicon-alumina in the crystal structure of clay minerals will be replaced by low-priced metal ions, which will have a permanent negative charge, making it have the characteristics of attracting positive charges and further expandability. Due to its low permeability, it is widely used. At the same time, due to the permanent negative charge of clay minerals, its structure will change dramatically with the type and concentration of surrounding cations. [0003] The permeability coefficient, also known as the hydraulic c...

AI Technical Summary

Problems solved by technology

Since the determination of the soil permeability coefficient is a time-consuming and laborious work, and in the actual soil environment, the composition of the soil solution is very complex, even for soils with basically the same composition, especially for soils with more clay mineral content, the permeability Coefficients can also vary greatly

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