Activated carbon is a black porous solid carbon that is produced by coal being pulverized, molded or carbonized and activated with uniform coal particles. The main ingredient is carbon, and contains a small amount of oxygen, hydrogen, sulfur, nitrogen, and other elements. The specific surface area of ordinary activated carbon is between 500 and 1700m²/g. It has strong adsorption performance and is an industrial adsorbent with a wide range of applications