Because of this, a large number of molecules on the pore wall of the activated carbon can produce a strong gravitational force, so as to achieve the purpose of attracting impurities in the medium to the aperture. It must be noted that the molecular diameter of these adsorbed impurities must be smaller than the aperture of the activated carbon, so that it is possible to ensure that the impurities are absorbed into the aperture. This is why we constantly change the raw materials and activation conditions to create activated carbon with different pore structures, so as to be suitable for various impurity absorption applications.  

The adsorption of activated carbon can be divided into physical adsorption and chemical adsorption. Physical adsorption mainly occurs in the process of removing impurities in the liquid and gas phases by activated carbon. The porous structure of activated carbon provides a large amount of surface area, which makes it very easy to absorb and collect impurities. Like magnetism, all molecules have an attraction to each other.

These surfaces contain ground oxides or complexes that can chemically react with adsorbed substances, thereby combining with adsorbed substances and aggregating on the surface of activated carbon. Take a typical example: in the process of water treatment, activated carbon can react with the chlorite in water to change the chlorite into the form of chloride ions, so as to achieve the purpose of removing the chlorite in water, so that the water no longer has an offensive taste and odor.

In addition to physical adsorption, chemical reactions often occur on the surface of activated carbon. Activated carbon not only contains carbon, but also contains a small amount of oxygen and hydrogen in the form of chemical binding and functional groups on its surface, such as carboxylic groups, hydroxyl groups, phenols, endolipids, quinones, ethers, etc.