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 [...]
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 [...]
After reading this article you will learn about:- 1. Definition of Ion-Exchange 2. Site for Ion Exchange 3. Kinds of Exchangeable Ions 4. Factors Affecting Ion-Exchange. Definition of Ion-Exchange: Ion-exchange is defined as a reversible process by which cations and anions are exchanged between solid and liquid phases, and between solid phases it in close contact with each other. For [...]