Surface chemistry:
Ordinary activated carbon: mainly relies on its high specific surface area and microporous structure to adsorb substances. Its surface chemical properties are relatively neutral, with only some basic oxygen functional groups.
Impregnated activated carbon: The surface is treated with specific chemicals, which will attach or chemically combine in the pores and surface of the activated carbon to form new active sites, making it particularly suitable for adsorbing or catalyzing specific types of pollutants.
Application range:
Ordinary activated carbon: widely used in water treatment, gas purification, decolorization, deodorization and other common adsorption tasks.
Impregnated activated carbon: After impregnation treatment, it has specificity and is mainly used to remove acidic gases (such as SO₂, HCl), heavy metals (such as mercury, lead), organic sulfides or certain specific organic compounds. Its application is more targeted and specialized.
Performance:
Ordinary activated carbon: commonly used for general odor control, color removal and ordinary organic compound adsorption.
Impregnated activated carbon: Increased chemical activity or surface functionalization through impregnation can significantly improve its adsorption capacity or catalytic performance for certain pollutants or chemicals.
Regeneration and service life:
Ordinary activated carbon: It can usually be regenerated by high temperature or other physical and chemical methods, but the regeneration process may cause partial attenuation of performance.
Impregnated activated carbon: Because the specific chemicals impregnated may be removed or deactivated during the regeneration process, its regeneration is usually more complicated and may not be economical.
Cost:
Ordinary activated carbon: It is usually more economical and widely used in various general treatment needs.
Impregnated activated carbon: Due to the impregnation process and material costs, its manufacturing and use costs are high, and the application scenarios are mostly high-value professional treatment needs.
In summary, the main difference between impregnated activated carbon and ordinary activated carbon is the specificity of the surface chemistry, so they have obvious differences in treatment targets and application scenarios. It is very important to choose the right type of activated carbon according to the specific pollutant type and treatment needs.