Exploring the Application of Colloid

As seen in the video above, it discusses various aspects of colloids, including their properties and formation. To begin, I learned about colloid, which is a type of mixture with particle sizes similar to those found in solutions and suspensions that scatter light (Tyndall effect) and appear cloudy or opaque. Aside from that, the different types of colloids were discussed, with examples such as smoke (solid in gas), fog (liquid in gas), and mayonnaise (liquid in liquid). Colloids can also be created by combining smaller molecules or breaking down larger particles. In addition to their properties, colloidal particles may have an electrical charge that aids in their dispersion and can be used in processes such as electrostatic precipitation. I learned about the application that uses the colloid concept after I clarified the type of colloids, their properties, and more. To remove carbon and dust particles from smoke, an electrostatic precipitator was used, through which smoke passes and charge particles in the colloid are attracted to an electrode, where they are neutralised and deposited as dust. What I am most interested in is the colloid component. Instead of solute and solvent, the dispersed phase and the substance in which the particle is dispersed will be the dispersion medium. As previously stated, smoke is a solid dispersed in gas, clouds, fogs and mist are liquids dispersed in gas, milk, mayonnaise and butter are liquids dispersed in liquid, jellies and gels are liquids dispersed in solids and foams and whipped cream are gas dispersed in liquid. This indicates that a colloid concept is always on the surrounding. Having said that, it does make me aware of its application because, surprisingly, it is new to me. 

One example has been chosen from this video which is how colloid applies in water treatment where the colloid is removed from the water from the formation of coagulation by using alum. Let us go through on below:

The Making of Water Treatment by Using Alum

Its basic principle:

Theoretically, colloid in water treatment is the process of removing very small particles that are dispersed in water and cause it to become cloudy or coloured. Colloids are particles that have an electric charge that prevents them from settling down. A chemical called a coagulant is added to the water to neutralise the charge and cause the colloids to stick together. This results in larger clumps known as flocs, which can be separated through filtration or sedimentation. Because colloids can contain harmful substances or microorganisms, their removal is critical for improving water quality and safety.