Colloidal particles in water are particles with a size of 10-4 to 10-6 millimeters, which are very stable in water and not easy to settle. Its natural settling rate is only 0.154 * 10-6 millimeters per second, and settling 1 meter requires 200 years. This is because colloidal particles are generally produced by the precipitation of difficult to dissolve chemicals from aqueous solutions. When many positive ions or molecular structures gather to reach a certain amount, the surface of the generated particle chemical substance has the ability to adsorb work, which can then adsorb many positive ions in water. Alternatively, due to the hydrolysis of the particle surface, many positive ions are formed, and the particle surface has the characteristic of induced electrification. Therefore:

(1) Colloids contain a male like positive charge, which causes opposite attraction and hinders the contact and adhesion between colloidal particles, promoting the particles to maintain their state and float in water;

(2) The surface of the colloid is also firmly surrounded by a layer of water, and this solidified layer also blocks and blocks the contact between colloidal particles, promoting the stability of the particle situation during thermal motion, rather than being stuck together and floating in the water.

Due to the two reasons mentioned above, it is difficult for colloidal particles in water to settle naturally.

Blocking and blocking the contact between colloidal particles, promoting the stability of colloidal particles during thermal motion, and preventing them from sticking together and floating in water.

Due to the two reasons mentioned above, it is difficult for colloidal particles in water to settle naturally.

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