The Adsorption Principle Of Dioxins By Activated Carbon

The adsorption of dioxins by activated carbon mainly depends on its unique pore structure. The pore structure of activated carbon includes specific surface area, pore volume and pore size distribution, which directly affect its adsorption performance for dioxins. After the dioxin molecules contact the surface of activated carbon through external diffusion, they diffuse into the pores through the pore channels on the surface of activated carbon. Therefore, the matching of pore size and dioxin molecule size is the key to effective adsorption.

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Principle of activated carbon adsorption of dioxins

The adsorption capacity of activated carbon is closely related to its specific surface area, pore volume and pore size distribution. The larger the specific surface area, the larger the contact area between activated carbon and dioxin molecules, and the stronger the adsorption capacity. Pore volume and pore size distribution also have an important influence on the adsorption effect. When the ratio of the pore size of activated carbon to the diameter of dioxin molecules is within a certain range, the adsorption effect is best. Studies have shown that the effective pore size range of activated carbon adsorbing dioxin molecules is 2.3~4.1nm, and if repeated regeneration is required, this range is 4.1~8.2nm.

In some environmental monitoring and dioxin control projects, activated carbon can be used for sampling and analysis of dioxins, enhancing detection capabilities through adsorption. The use of activated carbon in these applications effectively reduces the concentration of dioxins and reduces potential risks to the environment and human health.