What Are The Reasons That Affect The Adsorption of Activated Carbon?

(1) conditions temperature affects the diffusion rate and Adsorption equilibrium, the diffusion rate is related to the viscosity rate, increasing the temperature will increase the diffusion rate, and reach equilibrium faster, but the final Adsorption amount is also lower.

Higher pressure increases the Adsorption of gases, especially gases with less Adsorption at atmospheric pressure, which is the basis of variable pressure Adsorption.

pH value affects the Adsorption of colored compounds in solution. Many colored compounds change their structure and color at different pH values, and change their structure and color at different pH values. Treating the same solution with the same Activated Carbon at different pH values generally results in better Adsorption at a more generational pH value. The pH value of Activated Carbon can be adjusted at the time of manufacture to match the application.

(2) The ideal Activated Carbon should have an inner surface and large pore capacity that can accommodate the maximum weight of adsorbed material in the porous. Activated Carbon with many micropores tends to adsorb small molecules, and Activated Carbon with many large pores tends to adsorb larger molecules. Therefore the data of total surface and pore volume cannot be used to evaluate the possible effectiveness of Activated Carbon.

(3) Adsorption of organic substances in general increases with the increase of molecular weight until the molecules are too large to enter the carbon pores. Non-polar organic substances are more easily adsorbed from aqueous solutions than polar organic substances, and the Adsorption of other organic substances will be affected when they are mixed. Easily liquefied or high boiling point gases are more easily adsorbed. In the gas mixture, the gases that are easily adsorbed in their pure state are adsorbed first.