How does powdered activated carbon achieve the decolorization effect?

The main function of powdered activated carbon in sewage treatment plants is to decolorize, deodorize, remove peculiar smell and assist coagulation. bulk activated carbon pellets It is suitable for the purification of water quality such as sugar, pharmaceuticals, beverages, wine, food, printing and dyeing, papermaking, chemicals, and industrial wastewater.

The difference in decolorization effect of powdered activated carbon is mainly affected by two factors:

(1) Decolorization value of methylene blue:

Activated carbon has three major indicators:

Iodine adsorption value—Iodine adsorption value is used to indicate the adsorption capacity of activated carbon for liquid substances.

Carbon tetrachloride (CTC) adsorption value-carbon tetrachloride adsorption value is used to express the adsorption capacity of activated carbon for gaseous substances.

Methylene blue adsorption value-methylene blue adsorption value is used to indicate the decolorization ability of activated carbon. Generally, the higher the value, the better the decolorization effect of powder activated carbon, generally this value is 8-12ml/g.

(2) Mesh size of powder activated carbon:

Another influencing factor is the mesh size of the powdered activated carbon itself.activated carbon suppliers The conventional mesh size is about 200 meshes, and the pass rate is 90%. If the powder activated carbon mesh number reaches 300, the decolorization speed per unit time will be much faster, but if the powder activated carbon mesh number is too small, it will cause the activated carbon defiltration process to become very difficult in water treatment.

(3) PH value:

The pH value has a greater influence on the decolorization effect. Generally, the powdered activated carbon manufacturers have a good decolorization effect under acidic conditions.

Therefore, powder activated carbon manufacturers can see that the higher the methylene blue number adsorption value of powder activated carbon, the better the decolorization effect of powder activated carbon; the finer the powder activated carbon mesh, the better the decolorization effect of powder activated carbon.