Columnar activated carbon also called pellet activated carbon is not only contains carbon elements, but also contains functional groups on its surface, which chemically react with the adsorbed substances, and thus often occur on the surface of the activated carbon with the adsorbed substances.



The impurities in the medium continuously enter the porous structure of the activated carbon through physical adsorption and chemical adsorption, so that the adsorption of the activated carbon is saturated and the adsorption effect is reduced.



The activated carbon after adsorption saturation needs to be activated and regenerated to restore its adsorption capacity and reuse it. granular carbon The main indicators for evaluating the adsorption performance of activated carbon include methylene blue value, iodine value and caramel adsorption value. The larger the adsorption capacity, the better the adsorption effect.



Pellet activated carbon can be used in air purification and water supply and wastewater treatment to separate or collect impurities in air and water media. Pellet activated carbon has the same function as powdered carbon, and both can be used for water treatment.



Granular charcoal is not easy to be lost, can be regenerated and reused, and is used in water treatment processes with light pollution and continuous operation. Powdered activated charcoal is not easy to recycle. It is generally used for one-time use and is used in intermittent water treatment processes with serious pollution.



The granular activated carbon for water treatment is generally well-developed with micropores and mesopores, which should meet three requirements: large adsorption capacity, fast adsorption speed, and good mechanical strength. Powder activated carbon requires that in addition to the above characteristics, the smaller the particle size, the better the adsorption effect.