Granular activated carbon is a commonly used adsorbent, refined from raw materials such as coconut shells and coal through a special production process. It has large surface areas and microporous structures, so it has a strong adsorption capacity and can effectively adsorb and remove harmful substances from the environment, such as odors, colors, pollutants, etc. It is often used in the fields of water treatment, air purification, deodorization, etc.