Colloidal systems - those systems in which one substance is in another in the form of fine particles.Often they are called colloidal disperse, since the formation of these systems - a chemical process of condensation and dissolution of one substance in another, in which the solute particles are in constant (Brownian) motion.A striking example of colloidal dispersions may serve as emulsions, suspensions, foams and various bulk materials.
Colloidal systems for humans are playing a big role.In fact, the human body - a common colloidal dispersion system.Because in the body almost all substances dissolved in each other and are in constant motion.Basic biological colloidal systems of the body - the blood and the cell.The cell consists of a nucleus, ribosomes, lysosomes, Golgi complex, the EPR - the substance, which unites into one cell, and hyaloplasm membrane.
kernel is a colloidal medium, which is responsible for the biosynthesis of protein and DNA stability.The membrane colloidal substances responsible for the elasticity of the shell and perform a protective function.Hyaloplasm - a complex compound of the colloids in the cell, they are involved in biochemical reactions since they can move independently from one substance to another.
Blood also an example of the body's tissues, which is the basis of colloidal dispersion system.The elements of blood which include red blood cells, platelets and white blood cells - is colloids, and blood plasma - a dispersion medium.In plasma, all organic matter can be called colloid.Plasma-derived is water, it creates a dispersion medium in which organic constituents of plasma are: large protein molecules, the molecules of amino acids, mono- and polysaccharides, and many others.
Colloidal systems play an important role not only in the life of the human body.They also have great practical significance.Based on the studies of colloid-disperse processes have created new materials invented many chemical processes that are used extensively in the production and purification of water (including wastewater).
use of biological water treatment is becoming increasingly important, as the supply of fresh and potable water are reduced.Water purification chemicals leads to more pollution.
Biological water purification is the use of specific micro-organisms that metabolize organic constituents of sewage.Colonies of bacteria specific form original colloidal systems in the form of fine suspensions.In the course of life a colony of bacteria in her inbox, clear water from contamination.
Biological water treatment is of two types: clearance in vivo, in which the microorganisms receive oxygen from the environment, and artificial, in which microorganisms are functioning in a closed system, and the oxygen supplied to them by mechanical aeration.
