The adsorption principle of powdered activated carbon
The adsorption principle of powdered activated carbon is mainly based on its unique physical and chemical properties. First of all, activated carbon has a huge specific surface area, which means that it has more surface to contact and adsorb with the surrounding substance. This large specific surface area is due to the microporous structure of activated carbon, which is usually between a few nanometers and tens of nanometers in size, allowing activated carbon to adsorb substances much larger than its own volume.
Secondly, the surface of activated carbon is highly chemically active. This means that the surface of the activated carbon can chemically react with the surrounding substance to form chemical adsorption. This chemical adsorption is usually stronger than physical adsorption because the chemical reaction usually requires less energy.
In addition, activated carbon has good physical and chemical stability. It is insoluble in solvents such as water, acids, alkalis, etc., and is highly resistant to many chemicals. This allows activated carbon to maintain its adsorption properties under a wide range of environmental conditions.
In applications, powdered activated carbon is commonly used in water treatment, air purification, decolorization, deodorization, and other fields. In water treatment, activated carbon can adsorb pollutants such as organic matter, heavy metal ions, and pesticides in water. In air purification, activated carbon can adsorb particulates, harmful gases, and odors in the air. In decolorization and deodorization, activated carbon can adsorb pigments and odor molecules, making the product more beautiful and comfortable.
In general, the adsorption principle of powdered activated carbon is based on its unique physical and chemical properties, which enable it to maintain its adsorption properties under various environmental conditions, bringing many conveniences to our life and technical applications.