Activated carbon is a specially treated carbon.

Organic materials such as wood are heated in an air-isolated condition to react with gas, leaving countless tiny pores on the surface of activated carbon. Activated carbon is usually powdered or granular. The carbon content of activated carbon increases with the increase of activation temperature. The higher the activation temperature, the more complete the volatilized substances will be, and the greater the adsorption activity will be.

Adsorption mechanism:

Activated carbon adsorption refers to the use of the solid surface of activated carbon to adsorb one or more substances in water to achieve the purpose of purifying water quality. The adsorption capacity of activated carbon is related to the pore size and structure of activated carbon. Generally speaking, the smaller the particles, the faster the pore diffusion rate, and the stronger the adsorption capacity of activated carbon.

Adsorption capacity and adsorption speed are the main indicators to measure the adsorption process. The adsorption capacity is measured by the adsorption amount, and the adsorption rate refers to the amount adsorbed by the unit weight of the adsorbent per unit time. In water treatment, the adsorption rate determines the contact time between the adsorbent and sewage.