In this article we will discuss about:- 1. Meaning of Colloid 2. Properties of Colloid 3. Types 4. Soil Colloids. Meaning of Colloid: Graham (1861) divided the soluble substances into two classes—crystalloid and colloids depending on their power to diffuse through vegetable and animal membranes. Crystalline substances such as sugar, salt and urea which in solution diffused rapidly through animal [...]
After reading this article you will learn about the meaning and types of soil colloids. Meaning Soil Colloids: The colloidal state refers to a two-phase system in which one material (or materials) in a very finely divided state is dispersed through a second. Few examples of the colloidal state—milk and cheese; clouds and fog; starch, gelatin, rubber, proteins, blood, and [...]
This article throws light upon the eight important properties of colloidal particles present in soil. The properties are: 1. Adsorption 2. Brownian Movement 3. Electrical Charge 4. Flocculation 5. Plasticity 6. Cohesion and Adhesion 7. Swelling and Shrinkage 8. Non-Permeability. Property # 1. Adsorption: The surface adsorption is very large when large amount of colloidal materials are present in a [...]