Migration of Water-Soluble Substances in Rocks and Soils

2 Migration of Water-Soluble Substances in Rocks and Soils 

Advection the migration of dissolved components with flowing water 

Mixing of solutions in macropores, which is a consequence of different flowing rates of solutions in pores with different sizes 

In addition, the interactions of solid matrices and dissolved substances are as follows  

When the dissolved components are not sorbed by solid matrixes, the transport is determined by processes 1-3, that is, the dissolved components migrate together with water. The flux of flow can be described by different migration equations, for example, by Equation 1.127  

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In this chapter, the relationship of geological origins and interfacial properties of bentonite clay will be reviewed first. Then we will discuss the migration of water-soluble substances in rocks and soil, and the effect of sorption on the migration. A linear model will be derived by which the quantity of ion sorbed on rocks can be estimated when the mineral composition and sorption parameters of the mineral components are known. Surface acid-base properties of soils will be discussed, and the sorption of an anion (cyanide ion) will be shown on different soils and sediments. 

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